Re: [time-nuts] Serial port server .. any interest in a write up on using ?
On 05/22/2012 07:08 AM, Don Latham wrote: I'm also interested. Maybe a group buy? For strange reason I seem to see the same issue. Cheers, Magnus Don Jerry Mulchin Ditto for me.. Jerry At 08:16 PM 5/21/2012, you wrote: I would be interested in some more information. I've got quite a few RS232 devices as well and not nearly enough ports even if I used all my computers. Alan On Mon, May 21, 2012 at 8:55 PM, Pete Lancashire p...@petelancashire.comwrote: Like many time-nuts I have quite a few devices that communicate to the outside world with a serial port. And like many I have more then one. In a past life I use to have to connect to sometimes a 100 RS232 in one location. A popular device is called a terminal server or concentrator. They would take from 1 to 48 RS232 ports on one side and let you talk to them via an Ethernet interface. I so far have twelve RS232 ports in use. ... So if this is of interest to anyone I'll go into more detail, models, setup etc. -pete -pete ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. Jerry Mulchin ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Serial port server .. any interest in a write up on using ?
Another thread where the first mail never got to me ... I too am interested - I wonder why I have this problem too?! Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Jerry Mulchin Sent: 22 May 2012 04:51 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Serial port server .. any interest in a write up on using ? Ditto for me.. Jerry At 08:16 PM 5/21/2012, you wrote: I would be interested in some more information. I've got quite a few RS232 devices as well and not nearly enough ports even if I used all my computers. Alan On Mon, May 21, 2012 at 8:55 PM, Pete Lancashire p...@petelancashire.comwrote: Like many time-nuts I have quite a few devices that communicate to the outside world with a serial port. And like many I have more then one. In a past life I use to have to connect to sometimes a 100 RS232 in one location. A popular device is called a terminal server or concentrator. They would take from 1 to 48 RS232 ports on one side and let you talk to them via an Ethernet interface. I so far have twelve RS232 ports in use. ... So if this is of interest to anyone I'll go into more detail, models, setup etc. -pete -pete ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. Jerry Mulchin ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Serial port server .. any interest in a write up on using ?
Hi I'm interested as well. The USB gizmos are fine for close stuff. They aren't quite so nice for gizmos in the attic when the computer is in the basement… Bob On May 21, 2012, at 10:55 PM, Pete Lancashire wrote: Like many time-nuts I have quite a few devices that communicate to the outside world with a serial port. And like many I have more then one. In a past life I use to have to connect to sometimes a 100 RS232 in one location. A popular device is called a terminal server or concentrator. They would take from 1 to 48 RS232 ports on one side and let you talk to them via an Ethernet interface. I so far have twelve RS232 ports in use. Now that the need for such devices has diminished, these terminal servers are showing up, sometimes for pennies. One brand and model Digi's TS family of models I and have verified they work with Lady Heather and Trimble Studio on a Windows XP PC. Digi offers for free a program that makes each RS232 Port look like a COM port, and after configuring the terminal server, and this driver, you just just fire up Lady Heather pointing to the correct COM Port. Other RS232 ports on the terminal server can either be COM ports, or one can be connected to via Telnet of for security SSH. For example I have an Odetics on one port and I just enter telnet ts4a (the DNS name I gave one of the terminal servers) 2003 (the IP port associated with the third RS232 port). So if this is of interest to anyone I'll go into more detail, models, setup etc. -pete -pete ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Serial port server .. any interest in a write up onusing ?
Pete, I would like to hear more about this. Consider me an infant in 'network' and use really simple terms. I have an old Dell computer that runs Win2KPro with two serial ports built in that was discarded by my office. I use it to communicate with a TBolt and a Z3816A. The ability to communicate with several other serial ports would be beneficial but the thought of getting several PCI/Serial cards for the computer seemed like the only option. I would love to hear of other options, particularly for 'pennies'. Joe -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Pete Lancashire Sent: Monday, May 21, 2012 9:55 PM To: Discussion of precise time and frequency measurement Subject: [time-nuts] Serial port server .. any interest in a write up onusing ? Like many time-nuts I have quite a few devices that communicate to the outside world with a serial port. And like many I have more then one. In a past life I use to have to connect to sometimes a 100 RS232 in one location. A popular device is called a terminal server or concentrator. They would take from 1 to 48 RS232 ports on one side and let you talk to them via an Ethernet interface. I so far have twelve RS232 ports in use. Now that the need for such devices has diminished, these terminal servers are showing up, sometimes for pennies. One brand and model Digi's TS family of models I and have verified they work with Lady Heather and Trimble Studio on a Windows XP PC. Digi offers for free a program that makes each RS232 Port look like a COM port, and after configuring the terminal server, and this driver, you just just fire up Lady Heather pointing to the correct COM Port. Other RS232 ports on the terminal server can either be COM ports, or one can be connected to via Telnet of for security SSH. For example I have an Odetics on one port and I just enter telnet ts4a (the DNS name I gave one of the terminal servers) 2003 (the IP port associated with the third RS232 port). So if this is of interest to anyone I'll go into more detail, models, setup etc. -pete -pete ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Serial port server .. any interest in a write up onusing ?
For the maximum software compatibility, I'd go for the multiple port serial card. Next step up would be a PCI expansion chasis like a Magma using multiple serial cards. I got one on ebay and PCI slots work like the real thing under both linux and windows. I use it for multiple soundcards, but it works for any PCI card. The only trick is to power the PCI expansion chassis before booting. -Original Message- From: J. L. Trantham jlt...@att.net Sender: time-nuts-boun...@febo.com Date: Tue, 22 May 2012 06:54:02 To: 'Discussion of precise time and frequency measurement'time-nuts@febo.com Reply-To: Discussion of precise time and frequency measurement time-nuts@febo.com Subject: Re: [time-nuts] Serial port server .. any interest in a write up onusing ? Pete, I would like to hear more about this. Consider me an infant in 'network' and use really simple terms. I have an old Dell computer that runs Win2KPro with two serial ports built in that was discarded by my office. I use it to communicate with a TBolt and a Z3816A. The ability to communicate with several other serial ports would be beneficial but the thought of getting several PCI/Serial cards for the computer seemed like the only option. I would love to hear of other options, particularly for 'pennies'. Joe -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Pete Lancashire Sent: Monday, May 21, 2012 9:55 PM To: Discussion of precise time and frequency measurement Subject: [time-nuts] Serial port server .. any interest in a write up onusing ? Like many time-nuts I have quite a few devices that communicate to the outside world with a serial port. And like many I have more then one. In a past life I use to have to connect to sometimes a 100 RS232 in one location. A popular device is called a terminal server or concentrator. They would take from 1 to 48 RS232 ports on one side and let you talk to them via an Ethernet interface. I so far have twelve RS232 ports in use. Now that the need for such devices has diminished, these terminal servers are showing up, sometimes for pennies. One brand and model Digi's TS family of models I and have verified they work with Lady Heather and Trimble Studio on a Windows XP PC. Digi offers for free a program that makes each RS232 Port look like a COM port, and after configuring the terminal server, and this driver, you just just fire up Lady Heather pointing to the correct COM Port. Other RS232 ports on the terminal server can either be COM ports, or one can be connected to via Telnet of for security SSH. For example I have an Odetics on one port and I just enter telnet ts4a (the DNS name I gave one of the terminal servers) 2003 (the IP port associated with the third RS232 port). So if this is of interest to anyone I'll go into more detail, models, setup etc. -pete -pete ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Serial port server .. any interest in a write up onusing ?
There are Lantronix CoBox, XPort too and the TIBBO. Something like ebay 370532038785, 290714846432 for those of you in the States or 270711839584 for the Europe. They are one_serial_port-to-ethernet adapter based on the telnet protocol but Lantronix has a virtual COM port driver to translate the ethernet attached serial port into a normal COM port on your PC. On Tue, May 22, 2012 at 2:14 PM, li...@lazygranch.com wrote: For the maximum software compatibility, I'd go for the multiple port serial card. Next step up would be a PCI expansion chasis like a Magma using multiple serial cards. I got one on ebay and PCI slots work like the real thing under both linux and windows. I use it for multiple soundcards, but it works for any PCI card. The only trick is to power the PCI expansion chassis before booting. -Original Message- From: J. L. Trantham jlt...@att.net Sender: time-nuts-boun...@febo.com Date: Tue, 22 May 2012 06:54:02 To: 'Discussion of precise time and frequency measurement' time-nuts@febo.com Reply-To: Discussion of precise time and frequency measurement time-nuts@febo.com Subject: Re: [time-nuts] Serial port server .. any interest in a write up onusing ? Pete, I would like to hear more about this. Consider me an infant in 'network' and use really simple terms. I have an old Dell computer that runs Win2KPro with two serial ports built in that was discarded by my office. I use it to communicate with a TBolt and a Z3816A. The ability to communicate with several other serial ports would be beneficial but the thought of getting several PCI/Serial cards for the computer seemed like the only option. I would love to hear of other options, particularly for 'pennies'. Joe -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Pete Lancashire Sent: Monday, May 21, 2012 9:55 PM To: Discussion of precise time and frequency measurement Subject: [time-nuts] Serial port server .. any interest in a write up onusing ? Like many time-nuts I have quite a few devices that communicate to the outside world with a serial port. And like many I have more then one. In a past life I use to have to connect to sometimes a 100 RS232 in one location. A popular device is called a terminal server or concentrator. They would take from 1 to 48 RS232 ports on one side and let you talk to them via an Ethernet interface. I so far have twelve RS232 ports in use. Now that the need for such devices has diminished, these terminal servers are showing up, sometimes for pennies. One brand and model Digi's TS family of models I and have verified they work with Lady Heather and Trimble Studio on a Windows XP PC. Digi offers for free a program that makes each RS232 Port look like a COM port, and after configuring the terminal server, and this driver, you just just fire up Lady Heather pointing to the correct COM Port. Other RS232 ports on the terminal server can either be COM ports, or one can be connected to via Telnet of for security SSH. For example I have an Odetics on one port and I just enter telnet ts4a (the DNS name I gave one of the terminal servers) 2003 (the IP port associated with the third RS232 port). So if this is of interest to anyone I'll go into more detail, models, setup etc. -pete -pete ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Serial port server .. any interest in a write up onusing ?
My solution is 100% compatible with the OS. That is, no special drivers. I have had issues with some programs using virtual ports. Magma boxes were common in digital audio recording prior to really wide (multichannel) sound cards. I've run 5 soundcards at a time under linux with the Magma box. Any kernel 2.6 or higher can use the Magma scheme. It also runs on win2k and win7. Mac too in theory, but I don't use Apple hardware so I can't verify this. -Original Message- From: Azelio Boriani azelio.bori...@screen.it Sender: time-nuts-boun...@febo.com Date: Tue, 22 May 2012 14:19:38 To: Discussion of precise time and frequency measurementtime-nuts@febo.com Reply-To: Discussion of precise time and frequency measurement time-nuts@febo.com Subject: Re: [time-nuts] Serial port server .. any interest in a write up onusing ? There are Lantronix CoBox, XPort too and the TIBBO. Something like ebay 370532038785, 290714846432 for those of you in the States or 270711839584 for the Europe. They are one_serial_port-to-ethernet adapter based on the telnet protocol but Lantronix has a virtual COM port driver to translate the ethernet attached serial port into a normal COM port on your PC. On Tue, May 22, 2012 at 2:14 PM, li...@lazygranch.com wrote: For the maximum software compatibility, I'd go for the multiple port serial card. Next step up would be a PCI expansion chasis like a Magma using multiple serial cards. I got one on ebay and PCI slots work like the real thing under both linux and windows. I use it for multiple soundcards, but it works for any PCI card. The only trick is to power the PCI expansion chassis before booting. -Original Message- From: J. L. Trantham jlt...@att.net Sender: time-nuts-boun...@febo.com Date: Tue, 22 May 2012 06:54:02 To: 'Discussion of precise time and frequency measurement' time-nuts@febo.com Reply-To: Discussion of precise time and frequency measurement time-nuts@febo.com Subject: Re: [time-nuts] Serial port server .. any interest in a write up onusing ? Pete, I would like to hear more about this. Consider me an infant in 'network' and use really simple terms. I have an old Dell computer that runs Win2KPro with two serial ports built in that was discarded by my office. I use it to communicate with a TBolt and a Z3816A. The ability to communicate with several other serial ports would be beneficial but the thought of getting several PCI/Serial cards for the computer seemed like the only option. I would love to hear of other options, particularly for 'pennies'. Joe -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Pete Lancashire Sent: Monday, May 21, 2012 9:55 PM To: Discussion of precise time and frequency measurement Subject: [time-nuts] Serial port server .. any interest in a write up onusing ? Like many time-nuts I have quite a few devices that communicate to the outside world with a serial port. And like many I have more then one. In a past life I use to have to connect to sometimes a 100 RS232 in one location. A popular device is called a terminal server or concentrator. They would take from 1 to 48 RS232 ports on one side and let you talk to them via an Ethernet interface. I so far have twelve RS232 ports in use. Now that the need for such devices has diminished, these terminal servers are showing up, sometimes for pennies. One brand and model Digi's TS family of models I and have verified they work with Lady Heather and Trimble Studio on a Windows XP PC. Digi offers for free a program that makes each RS232 Port look like a COM port, and after configuring the terminal server, and this driver, you just just fire up Lady Heather pointing to the correct COM Port. Other RS232 ports on the terminal server can either be COM ports, or one can be connected to via Telnet of for security SSH. For example I have an Odetics on one port and I just enter telnet ts4a (the DNS name I gave one of the terminal servers) 2003 (the IP port associated with the third RS232 port). So if this is of interest to anyone I'll go into more detail, models, setup etc. -pete -pete ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to
Re: [time-nuts] Serial port server .. any interest in a write up onusing ?
I use the lantronix serial to ethernet converters and I use Xylogix terminal servers. I've not had much luck getting either to work with classic windows based applications, though I'd love to do so as I have a plethora of both. I use a 64 port xylogix in the basement to connect to all the serial ports of various servers, routers, and other old or embedded gear without ethernet. It does that job very very well. On Tue, May 22, 2012 at 11:37 AM, li...@lazygranch.com wrote: My solution is 100% compatible with the OS. That is, no special drivers. I have had issues with some programs using virtual ports. Magma boxes were common in digital audio recording prior to really wide (multichannel) sound cards. I've run 5 soundcards at a time under linux with the Magma box. Any kernel 2.6 or higher can use the Magma scheme. It also runs on win2k and win7. Mac too in theory, but I don't use Apple hardware so I can't verify this. -Original Message- From: Azelio Boriani azelio.bori...@screen.it Sender: time-nuts-boun...@febo.com Date: Tue, 22 May 2012 14:19:38 To: Discussion of precise time and frequency measurement time-nuts@febo.com Reply-To: Discussion of precise time and frequency measurement time-nuts@febo.com Subject: Re: [time-nuts] Serial port server .. any interest in a write up onusing ? There are Lantronix CoBox, XPort too and the TIBBO. Something like ebay 370532038785, 290714846432 for those of you in the States or 270711839584 for the Europe. They are one_serial_port-to-ethernet adapter based on the telnet protocol but Lantronix has a virtual COM port driver to translate the ethernet attached serial port into a normal COM port on your PC. On Tue, May 22, 2012 at 2:14 PM, li...@lazygranch.com wrote: For the maximum software compatibility, I'd go for the multiple port serial card. Next step up would be a PCI expansion chasis like a Magma using multiple serial cards. I got one on ebay and PCI slots work like the real thing under both linux and windows. I use it for multiple soundcards, but it works for any PCI card. The only trick is to power the PCI expansion chassis before booting. -Original Message- From: J. L. Trantham jlt...@att.net Sender: time-nuts-boun...@febo.com Date: Tue, 22 May 2012 06:54:02 To: 'Discussion of precise time and frequency measurement' time-nuts@febo.com Reply-To: Discussion of precise time and frequency measurement time-nuts@febo.com Subject: Re: [time-nuts] Serial port server .. any interest in a write up onusing ? Pete, I would like to hear more about this. Consider me an infant in 'network' and use really simple terms. I have an old Dell computer that runs Win2KPro with two serial ports built in that was discarded by my office. I use it to communicate with a TBolt and a Z3816A. The ability to communicate with several other serial ports would be beneficial but the thought of getting several PCI/Serial cards for the computer seemed like the only option. I would love to hear of other options, particularly for 'pennies'. Joe -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Pete Lancashire Sent: Monday, May 21, 2012 9:55 PM To: Discussion of precise time and frequency measurement Subject: [time-nuts] Serial port server .. any interest in a write up onusing ? Like many time-nuts I have quite a few devices that communicate to the outside world with a serial port. And like many I have more then one. In a past life I use to have to connect to sometimes a 100 RS232 in one location. A popular device is called a terminal server or concentrator. They would take from 1 to 48 RS232 ports on one side and let you talk to them via an Ethernet interface. I so far have twelve RS232 ports in use. Now that the need for such devices has diminished, these terminal servers are showing up, sometimes for pennies. One brand and model Digi's TS family of models I and have verified they work with Lady Heather and Trimble Studio on a Windows XP PC. Digi offers for free a program that makes each RS232 Port look like a COM port, and after configuring the terminal server, and this driver, you just just fire up Lady Heather pointing to the correct COM Port. Other RS232 ports on the terminal server can either be COM ports, or one can be connected to via Telnet of for security SSH. For example I have an Odetics on one port and I just enter telnet ts4a (the DNS name I gave one of the terminal servers) 2003 (the IP port associated with the third RS232 port). So if this is of interest to anyone I'll go into more detail, models, setup etc. -pete -pete ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Serial port server .. any interest in a write up on using ?
Terminal servers are simple boxes. You just Telnet to the port. Not much you need to know to use one. But the question is Where to buy one cheap? Is someone on eBay or the like trying to unload a bunch of these? On Tue, May 22, 2012 at 4:26 AM, Bob Camp li...@rtty.us wrote: Hi I'm interested as well. The USB gizmos are fine for close stuff. They aren't quite so nice for gizmos in the attic when the computer is in the basement… Bob On May 21, 2012, at 10:55 PM, Pete Lancashire wrote: Like many time-nuts I have quite a few devices that communicate to the outside world with a serial port. And like many I have more then one. In a past life I use to have to connect to sometimes a 100 RS232 in one location. A popular device is called a terminal server or concentrator. They would take from 1 to 48 RS232 ports on one side and let you talk to them via an Ethernet interface. I so far have twelve RS232 ports in use. Now that the need for such devices has diminished, these terminal servers are showing up, sometimes for pennies. One brand and model Digi's TS family of models I and have verified they work with Lady Heather and Trimble Studio on a Windows XP PC. Digi offers for free a program that makes each RS232 Port look like a COM port, and after configuring the terminal server, and this driver, you just just fire up Lady Heather pointing to the correct COM Port. Other RS232 ports on the terminal server can either be COM ports, or one can be connected to via Telnet of for security SSH. For example I have an Odetics on one port and I just enter telnet ts4a (the DNS name I gave one of the terminal servers) 2003 (the IP port associated with the third RS232 port). So if this is of interest to anyone I'll go into more detail, models, setup etc. -pete -pete ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- Chris Albertson Redondo Beach, California ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Serial port server .. any interest in a write up on using ?
I buy them on ebay. Usually $30+SH for 32 ports. 64 port units are harder to find as are self booting units. (Most xylogics boot from the network, which is easy enough to make work) On Tue, May 22, 2012 at 11:46 AM, Chris Albertson albertson.ch...@gmail.com wrote: Terminal servers are simple boxes. You just Telnet to the port. Not much you need to know to use one. But the question is Where to buy one cheap? Is someone on eBay or the like trying to unload a bunch of these? On Tue, May 22, 2012 at 4:26 AM, Bob Camp li...@rtty.us wrote: Hi I'm interested as well. The USB gizmos are fine for close stuff. They aren't quite so nice for gizmos in the attic when the computer is in the basement… Bob On May 21, 2012, at 10:55 PM, Pete Lancashire wrote: Like many time-nuts I have quite a few devices that communicate to the outside world with a serial port. And like many I have more then one. In a past life I use to have to connect to sometimes a 100 RS232 in one location. A popular device is called a terminal server or concentrator. They would take from 1 to 48 RS232 ports on one side and let you talk to them via an Ethernet interface. I so far have twelve RS232 ports in use. Now that the need for such devices has diminished, these terminal servers are showing up, sometimes for pennies. One brand and model Digi's TS family of models I and have verified they work with Lady Heather and Trimble Studio on a Windows XP PC. Digi offers for free a program that makes each RS232 Port look like a COM port, and after configuring the terminal server, and this driver, you just just fire up Lady Heather pointing to the correct COM Port. Other RS232 ports on the terminal server can either be COM ports, or one can be connected to via Telnet of for security SSH. For example I have an Odetics on one port and I just enter telnet ts4a (the DNS name I gave one of the terminal servers) 2003 (the IP port associated with the third RS232 port). So if this is of interest to anyone I'll go into more detail, models, setup etc. -pete -pete ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- Chris Albertson Redondo Beach, California ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Serial port server .. any interest in a write up onusing ?
On Tue, May 22, 2012 at 11:46 PM, Bob Bownes bow...@gmail.com wrote: I use the lantronix serial to ethernet converters and I use Xylogix terminal servers. I've not had much luck getting either to work with classic windows based applications, though I'd love to do so as I have a plethora of both. Further OT, but the best use of the word plethora is in The Three Amigos: http://www.imdb.com/title/tt0092086/quotes -- Sanjeev Gupta +65 98551208 http://www.linkedin.com/in/ghane ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Datum ExacTime 6000
Hi, I have just acquired a Datum ExacTime 6000 GPS Time Code And Frequency Generator. So far, I am impressed how fast this unit has stabilized into the low 10e-11 accuracy range... I verify this against the CHU station carrier (located 15 Km away) . The version of ExacTime 6000 I have is equipped with an OCXO mounted on the motherboard. The former owner told me that the unit had been upgraded to fix an IRIG B format issue. I cannot find the info on that upgrade. So I have the following questions: - What is the general impression on the performance of this ExacTime 6000 box? - The SELECT MODE menu shows possible selections as AUTO, 1SV4, 2SV4, 3SV4, FW or something close to that (I go by memory)... but the manual provided by Symmetricom suggests selections as Auto, STATIONARY, DYNAMIC, FW... I would like to set it to stationary. What selection should I make? - The latest manual provided by Symmetricom is version 8500-0105. Is there a newer manual available? - I saw a claim that there is a Windows software to manage the device. Where can I get it? - I tried to output the 1PPS signal throught he rear BNCs. I can set all rates from 10MHz down to 0.1Hz, but I don't see anything triggering on the scope when I set it to 1PPS. Am I missing something here? I hope this is not too much work. I would appreciate any assistance, even partial, with these questions. Thanks in advance, Bert, VE2ZAZ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Re Serial Port Server
Serial Port Servers provide many advantages over serial port cards installed in a computer. More than one computer on the network can access a serial port, though not simultaneously, and access can occur over a wireles network. Two serial port servers I have and use are the Digi Portserver TS 16 and the Comtrol Devicemaster. Each of these Serial Port Servers utilize an ethernet connection, are 1 rack unit (RU), appear as installed serial ports on each installed computer, have 16 serial ports, and require no installed operating system. These can be obtained at reasonable prices on auction sites. I would not recommend building up a computer with numerous serial cards, as this solution is not as flexible. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Datum ExacTime 6000
Hi; It has been a while, I think in Auto Mode it will determine it's location in Survey Mode 1SW4?, and if stationary will switch to Stationary Mode 3SW4? as a Freq Standard. FW is Free Wheel Mode where the oscillator is undisciplined. These units with the Ovenized Quartz option have Phase Noise usally about -85/90 dB @1Hz with a floor of about 155/160dB max which is pretty good, but not quite as good as a units based on a 10811 for example. But quartz unit to unit vary widely and like the 10811 the datum oscillator is quite common. You most likely can find a premium one with far better specs. Where the ET6000 shines is features such as programmable inputs and outputs. The manual should be easy to find on line. Best Wishes; Thomas Knox Date: Tue, 22 May 2012 09:15:45 -0700 From: ve2...@yahoo.ca To: time-nuts@febo.com Subject: [time-nuts] Datum ExacTime 6000 Hi, I have just acquired a Datum ExacTime 6000 GPS Time Code And Frequency Generator. So far, I am impressed how fast this unit has stabilized into the low 10e-11 accuracy range... I verify this against the CHU station carrier (located 15 Km away) . The version of ExacTime 6000 I have is equipped with an OCXO mounted on the motherboard. The former owner told me that the unit had been upgraded to fix an IRIG B format issue. I cannot find the info on that upgrade. So I have the following questions: - What is the general impression on the performance of this ExacTime 6000 box? - The SELECT MODE menu shows possible selections as AUTO, 1SV4, 2SV4, 3SV4, FW or something close to that (I go by memory)... but the manual provided by Symmetricom suggests selections as Auto, STATIONARY, DYNAMIC, FW... I would like to set it to stationary. What selection should I make? - The latest manual provided by Symmetricom is version 8500-0105. Is there a newer manual available? - I saw a claim that there is a Windows software to manage the device. Where can I get it? - I tried to output the 1PPS signal throught he rear BNCs. I can set all rates from 10MHz down to 0.1Hz, but I don't see anything triggering on the scope when I set it to 1PPS. Am I missing something here? I hope this is not too much work. I would appreciate any assistance, even partial, with these questions. Thanks in advance, Bert, VE2ZAZ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Re Serial Port Server
bdsy...@yahoo.com said: I would not recommend building up a computer with numerous serial cards, as this solution is not as flexible. One advantage of serial cards is much better timing. It's also one less box that has to be working in order to get data. -- These are my opinions. I hate spam. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Re Serial Port Server
Not to mention a PC with a real hardware serial port is how much consumer software is tested. --Original Message-- From: Hal Murray Sender: time-nuts-boun...@febo.com To: Discussion of precise time and frequency measurement ReplyTo: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Re Serial Port Server Sent: May 22, 2012 1:16 PM bdsy...@yahoo.com said: I would not recommend building up a computer with numerous serial cards, as this solution is not as flexible. One advantage of serial cards is much better timing. It's also one less box that has to be working in order to get data. -- These are my opinions. I hate spam. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Serial port server .. any interest in a write up on using ?
Some comments The make and model I'm using is Digi www.digi.com http://www.digi.com/products/serialservers/portserverts#overview I've used the 1, 4 and 16 port. The 1 and 4 are the same design. USB There are USB serial port servers, I have one that is 4 ports. But like anything USB it requires the computer to be close. For me I have two locations where my gizmo's are not near the PC. The other is at times I want to be able to run Lady Heather or Trimble Studio from my Laptop which maybe out on the porch while having a beer and operating the BBQ :-) Group buy The model I've been using is still made but even the 1 port model is over $100. The 4 port model shows up on the E quite often and I've been able to get them for as little as $20. The 16 port model was $5 at a local used PC store. Cards (Internal) For me pretty much the same as USB, and the other for me is the PC I have on the bench has only 2 short length PCI slots. One is taken up with a GPIB card an the other a data acquisitions card. Another is I have two benches. With a network attached setup I can access my serial stuff from either bench. This is my setup your mileage may very like in many setups. Also past experience has not been pleasant with these things. If your 100% Microsoft and never update past XP you may be OK Other makes, Lantronix, Cyclades, etc. Other then Cyclades 48 port servers, Digi is the only other vendor I've worked work. Hence not disqualifying anyone else just what I've used. Terminal servers are simple boxes. You just Telnet to the port. Some are, some like the current generation Digi's go beyond that. For example the software that makes a port on the Digi look like a COM (uSoft) or TTY (*nix) port. They even do things like create port tunnels, where a serial port on two box 'look' like the same port. One thing I like with the ones I have is you can for example set port 1 to emulate a COM port, port 2 to respond as a telnet session, port3 to only use SSL so you can safely use it over the Internet, etc. And if you really careful, you can have multiple network sessions telnet for example to one serial port. Something I've not yet tried. Cost Pretty much how good you are at finding stuff, where you live, etc. My 16 port unit was $5, the most I've paid is something like $40 (1/3 of it shipping) for a 4 port models. I will be adding a wiki to my yet to be developed website and will make a page on what I've implemented, I'd love to see what others have done with different makes and models, specially in emulating COM/TTY ports. Before that I'll write up a short summery for this weekend. -pete On Mon, May 21, 2012 at 7:55 PM, Pete Lancashire p...@petelancashire.com wrote: Like many time-nuts I have quite a few devices that communicate to the outside world with a serial port. And like many I have more then one. In a past life I use to have to connect to sometimes a 100 RS232 in one location. A popular device is called a terminal server or concentrator. They would take from 1 to 48 RS232 ports on one side and let you talk to them via an Ethernet interface. I so far have twelve RS232 ports in use. Now that the need for such devices has diminished, these terminal servers are showing up, sometimes for pennies. One brand and model Digi's TS family of models I and have verified they work with Lady Heather and Trimble Studio on a Windows XP PC. Digi offers for free a program that makes each RS232 Port look like a COM port, and after configuring the terminal server, and this driver, you just just fire up Lady Heather pointing to the correct COM Port. Other RS232 ports on the terminal server can either be COM ports, or one can be connected to via Telnet of for security SSH. For example I have an Odetics on one port and I just enter telnet ts4a (the DNS name I gave one of the terminal servers) 2003 (the IP port associated with the third RS232 port). So if this is of interest to anyone I'll go into more detail, models, setup etc. -pete -pete ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Serial port server .. any interest in a write up on using ?
BB sent me an email today advertising optically isolated USB to serial but the price awfully high for personal use: http://www.bb-elec.com/product_multi_family.asp?MultiFamilyId=133Trail=45TrailType=Main I have yet to be happy with any USB to serial conversion in legacy applications. They always end up less than transparent so instead I end up building a legacy PC from old and new parts. On Tue, 22 May 2012 04:48:35 +, Poul-Henning Kamp p...@phk.freebsd.dk wrote: In message 20120522035119.lqwt4155.fed1rmfepo102.cox@fed1rmimpo305.cox.net These days multiport USB-serial converters is a relevant low-cost alternative to port-servers, but there are some features of port-servers which don't seem to migrate over there, most notably optically isolated ports. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Serial port server .. any interest in a write up on using ?
I've played with a Lantronix single port server and a Digi 16 port server with no problems for simple COM port emulation. But I wonder if they would work well with an NTP server. Has anyone tested that? Is the network delay a problem due to either amount of delay or variation in the delay? Ed On 5/22/2012 12:51 PM, Pete Lancashire wrote: Some comments The make and model I'm using is Digi www.digi.com http://www.digi.com/products/serialservers/portserverts#overview I've used the 1, 4 and 16 port. The 1 and 4 are the same design. USB There are USB serial port servers, I have one that is 4 ports. But like anything USB it requires the computer to be close. For me I have two locations where my gizmo's are not near the PC. The other is at times I want to be able to run Lady Heather or Trimble Studio from my Laptop which maybe out on the porch while having a beer and operating the BBQ :-) Group buy The model I've been using is still made but even the 1 port model is over $100. The 4 port model shows up on the E quite often and I've been able to get them for as little as $20. The 16 port model was $5 at a local used PC store. Cards (Internal) For me pretty much the same as USB, and the other for me is the PC I have on the bench has only 2 short length PCI slots. One is taken up with a GPIB card an the other a data acquisitions card. Another is I have two benches. With a network attached setup I can access my serial stuff from either bench. This is my setup your mileage may very like in many setups. Also past experience has not been pleasant with these things. If your 100% Microsoft and never update past XP you may be OK Other makes, Lantronix, Cyclades, etc. Other then Cyclades 48 port servers, Digi is the only other vendor I've worked work. Hence not disqualifying anyone else just what I've used. Terminal servers are simple boxes. You just Telnet to the port. Some are, some like the current generation Digi's go beyond that. For example the software that makes a port on the Digi look like a COM (uSoft) or TTY (*nix) port. They even do things like create port tunnels, where a serial port on two box 'look' like the same port. One thing I like with the ones I have is you can for example set port 1 to emulate a COM port, port 2 to respond as a telnet session, port3 to only use SSL so you can safely use it over the Internet, etc. And if you really careful, you can have multiple network sessions telnet for example to one serial port. Something I've not yet tried. Cost Pretty much how good you are at finding stuff, where you live, etc. My 16 port unit was $5, the most I've paid is something like $40 (1/3 of it shipping) for a 4 port models. I will be adding a wiki to my yet to be developed website and will make a page on what I've implemented, I'd love to see what others have done with different makes and models, specially in emulating COM/TTY ports. Before that I'll write up a short summery for this weekend. -pete On Mon, May 21, 2012 at 7:55 PM, Pete Lancashire p...@petelancashire.com wrote: Like many time-nuts I have quite a few devices that communicate to the outside world with a serial port. And like many I have more then one. In a past life I use to have to connect to sometimes a 100 RS232 in one location. A popular device is called a terminal server or concentrator. They would take from 1 to 48 RS232 ports on one side and let you talk to them via an Ethernet interface. I so far have twelve RS232 ports in use. Now that the need for such devices has diminished, these terminal servers are showing up, sometimes for pennies. One brand and model Digi's TS family of models I and have verified they work with Lady Heather and Trimble Studio on a Windows XP PC. Digi offers for free a program that makes each RS232 Port look like a COM port, and after configuring the terminal server, and this driver, you just just fire up Lady Heather pointing to the correct COM Port. Other RS232 ports on the terminal server can either be COM ports, or one can be connected to via Telnet of for security SSH. For example I have an Odetics on one port and I just enter telnet ts4a (the DNS name I gave one of the terminal servers) 2003 (the IP port associated with the third RS232 port). So if this is of interest to anyone I'll go into more detail, models, setup etc. -pete ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Serial port server .. any interest in a write up on using ?
ed_pal...@sasktel.net said: I've played with a Lantronix single port server and a Digi 16 port server with no problems for simple COM port emulation. But I wonder if they would work well with an NTP server. Has anyone tested that? Is the network delay a problem due to either amount of delay or variation in the delay? I haven't done the experiment. If your network is lightly loaded, there shouldn't be much jitter. All bets are off if your network is overloaded. I think it depends upon your goal. If your target is a few 10s of ms, I'd expect them to work. If your target is a few microseconds, I'd expect problems. -- These are my opinions. I hate spam. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Serial port server .. any interest in a write up on using ?
Hi I'd bet at least a cold order of french fries that you would be below 1 ms on a modern home wired LAN. Certainly everything I ping locally is sub 1 ms unless wireless is involved. Bob On May 22, 2012, at 4:44 PM, Hal Murray wrote: ed_pal...@sasktel.net said: I've played with a Lantronix single port server and a Digi 16 port server with no problems for simple COM port emulation. But I wonder if they would work well with an NTP server. Has anyone tested that? Is the network delay a problem due to either amount of delay or variation in the delay? I haven't done the experiment. If your network is lightly loaded, there shouldn't be much jitter. All bets are off if your network is overloaded. I think it depends upon your goal. If your target is a few 10s of ms, I'd expect them to work. If your target is a few microseconds, I'd expect problems. -- These are my opinions. I hate spam. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Serial port server .. any interest in a write up on using ?
I've never though about using one to distribute the 1PPS for NTP. Its a pity there isn't enough umph inside one of these little Linux boxes to implement NTP. -pete On Tue, May 22, 2012 at 12:39 PM, Ed Palmer ed_pal...@sasktel.net wrote: I've played with a Lantronix single port server and a Digi 16 port server with no problems for simple COM port emulation. But I wonder if they would work well with an NTP server. Has anyone tested that? Is the network delay a problem due to either amount of delay or variation in the delay? Ed On 5/22/2012 12:51 PM, Pete Lancashire wrote: Some comments The make and model I'm using is Digi www.digi.com http://www.digi.com/products/serialservers/portserverts#overview I've used the 1, 4 and 16 port. The 1 and 4 are the same design. USB There are USB serial port servers, I have one that is 4 ports. But like anything USB it requires the computer to be close. For me I have two locations where my gizmo's are not near the PC. The other is at times I want to be able to run Lady Heather or Trimble Studio from my Laptop which maybe out on the porch while having a beer and operating the BBQ :-) Group buy The model I've been using is still made but even the 1 port model is over $100. The 4 port model shows up on the E quite often and I've been able to get them for as little as $20. The 16 port model was $5 at a local used PC store. Cards (Internal) For me pretty much the same as USB, and the other for me is the PC I have on the bench has only 2 short length PCI slots. One is taken up with a GPIB card an the other a data acquisitions card. Another is I have two benches. With a network attached setup I can access my serial stuff from either bench. This is my setup your mileage may very like in many setups. Also past experience has not been pleasant with these things. If your 100% Microsoft and never update past XP you may be OK Other makes, Lantronix, Cyclades, etc. Other then Cyclades 48 port servers, Digi is the only other vendor I've worked work. Hence not disqualifying anyone else just what I've used. Terminal servers are simple boxes. You just Telnet to the port. Some are, some like the current generation Digi's go beyond that. For example the software that makes a port on the Digi look like a COM (uSoft) or TTY (*nix) port. They even do things like create port tunnels, where a serial port on two box 'look' like the same port. One thing I like with the ones I have is you can for example set port 1 to emulate a COM port, port 2 to respond as a telnet session, port3 to only use SSL so you can safely use it over the Internet, etc. And if you really careful, you can have multiple network sessions telnet for example to one serial port. Something I've not yet tried. Cost Pretty much how good you are at finding stuff, where you live, etc. My 16 port unit was $5, the most I've paid is something like $40 (1/3 of it shipping) for a 4 port models. I will be adding a wiki to my yet to be developed website and will make a page on what I've implemented, I'd love to see what others have done with different makes and models, specially in emulating COM/TTY ports. Before that I'll write up a short summery for this weekend. -pete On Mon, May 21, 2012 at 7:55 PM, Pete Lancashire p...@petelancashire.com wrote: Like many time-nuts I have quite a few devices that communicate to the outside world with a serial port. And like many I have more then one. In a past life I use to have to connect to sometimes a 100 RS232 in one location. A popular device is called a terminal server or concentrator. They would take from 1 to 48 RS232 ports on one side and let you talk to them via an Ethernet interface. I so far have twelve RS232 ports in use. Now that the need for such devices has diminished, these terminal servers are showing up, sometimes for pennies. One brand and model Digi's TS family of models I and have verified they work with Lady Heather and Trimble Studio on a Windows XP PC. Digi offers for free a program that makes each RS232 Port look like a COM port, and after configuring the terminal server, and this driver, you just just fire up Lady Heather pointing to the correct COM Port. Other RS232 ports on the terminal server can either be COM ports, or one can be connected to via Telnet of for security SSH. For example I have an Odetics on one port and I just enter telnet ts4a (the DNS name I gave one of the terminal servers) 2003 (the IP port associated with the third RS232 port). So if this is of interest to anyone I'll go into more detail, models, setup etc. -pete ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe,
Re: [time-nuts] Serial port server .. any interest in a write up on using ?
On Tue, May 22, 2012 at 3:37 PM, Pete Lancashire p...@petelancashire.com wrote: I've never though about using one to distribute the 1PPS for NTP. Its a pity there isn't enough umph inside one of these little Linux boxes to implement NTP. How little is the linux box? NTP runs fine on my 1.8Ghz Atom powered box. It even runs on the ARM powered router. I've never seen a box to small. Even a smart phone is over kill But, no, you can't distribute PPS over the network. It will be so poor that NTP will reject it. Or to put it another way it will bee so poor that you may as well not use it, just connect to another NTP server. In fact, an NTP to NTP connection over the same network would be better then a PPS connection over the same network because with the NTP to NTP case the delay is measured -- Chris Albertson Redondo Beach, California ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Serial port server .. any interest in a write up on using ?
On 5/22/2012 3:39 PM, Ed Palmer wrote: I've played with a Lantronix single port server and a Digi 16 port server with no problems for simple COM port emulation. But I wonder if they would work well with an NTP server. Has anyone tested that? Is the network delay a problem due to either amount of delay or variation in the delay? I use a Moxa NPort 5610 with a Thunderbolt for NTP. Only the serial goes through the Moxa, the PPS goes direct to DCD on a local serial port. I do that because the Moxa allows multiple access to the attached serial device, so I can run both NTP and Lady Heather against the Thunderbolt. Since NTP locks to the PPS, and only uses the serial for TOD, latency isn't an issue. The Linux drivers are, um, interesting, but they do work, once you get them configured and running. It appears as a serial device under /dev/. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Serial port server .. any interest in a write up on using ?
li...@rtty.us said: I'd bet at least a cold order of french fries that you would be below 1 ms on a modern home wired LAN. Certainly everything I ping locally is sub 1 ms unless wireless is involved. The delay doesn't matter much. You can correct for it. I can measure sub ms even over a wifi link. The jitter will be the problem. That will depend upon the load and your setup. Here is an interesting sample: 64 bytes from xo-c2 (192.168.1.105): icmp_seq=7 ttl=64 time=1.66 ms 64 bytes from xo-c2 (192.168.1.105): icmp_seq=8 ttl=64 time=1.63 ms 64 bytes from xo-c2 (192.168.1.105): icmp_seq=9 ttl=64 time=1.58 ms 64 bytes from xo-c2 (192.168.1.105): icmp_seq=10 ttl=64 time=49.2 ms 64 bytes from xo-c2 (192.168.1.105): icmp_seq=11 ttl=64 time=67.9 ms 64 bytes from xo-c2 (192.168.1.105): icmp_seq=12 ttl=64 time=1.59 ms 64 bytes from xo-c2 (192.168.1.105): icmp_seq=13 ttl=64 time=1.58 ms 64 bytes from xo-c2 (192.168.1.105): icmp_seq=14 ttl=64 time=63.6 ms 64 bytes from xo-c2 (192.168.1.105): icmp_seq=15 ttl=64 time=50.0 ms 64 bytes from xo-c2 (192.168.1.105): icmp_seq=16 ttl=64 time=1.64 ms 64 bytes from xo-c2 (192.168.1.105): icmp_seq=17 ttl=64 time=1.71 ms Note that 4 samples are way off scale. The target machine is idle, but the packets are going over a wifi link that has other traffic but is far from overloaded. Yes, this is wifi rather than a simple ethernet switch. I suspect I could make similar problems with a pair of ethernet switches. p...@petelancashire.com said: I've never though about using one to distribute the 1PPS for NTP. Its a pity there isn't enough umph inside one of these little Linux boxes to implement NTP. If it's smart enough to run Linux, it should be able to run NTP. If you have an example that doesn't work, please contact me off list. The usual problem is that there isn't a handy way to get a PPS into the box. Depending on your goals, PPS over USB might work. gpsd uses an ioctl to wakeup on modem signal change. It works for some USB serial chips. So a box with only USB can probably keep time in the low ms range. (Beware of hanging bridges.) -- These are my opinions. I hate spam. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Serial port server .. any interest in a write up on using ?
On 05/22/2012 06:37 PM, Pete Lancashire wrote: I've never though about using one to distribute the 1PPS for NTP. Its a pity there isn't enough umph inside one of these little Linux boxes to implement NTP. Don't get too excited because this is many months out, but I'm working towards designing a single-board ARM linux computer to run a NTP server. It'll connect to a GPS receiver via UART and PPS, using a hardware timer peripheral in input capture mode to compensate the PPS for interrupt latency (maybe overkill), and the CPU can be clocked by your favorite GPSDO or OCXO. I've seen this done by hacking up x86 hardware, but purpose-built will do even better and will consume very ltitle power. Your OCXO on the other hand, well I can't do anything about that :) I also need to look into whether there's specialty ethernet hardware needed to make an ideal PTP source, I barely know anything about it. Hopefully it's available for a reasonable cost. As it is the board should be 40 USD, but I'm still working on the schematic and there's always room to bloat the project with more features. But first I need to finish the Resolution SMT interface boards I've promised to make. Sent for 9 PCBs yesterday, should arrive in 2-3 weeks. Here's to feature creep, -- m. tharp ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] NTP latency monitoring
Hi guys, About 40 minutes in ESR talks about bufferbloat and NTP skew issues; https://plus.google.com/118131797905622113230/posts/FBTdvYhR8qS Anyone tinkered with measuring GPSd, NTPd and network delay tomography? regards, Kim -- http://vk5fj.blogspot.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Serial port server .. any interest in a writeup onusing ?
I used to run a multi-line BBS (Wildcat!) and may still have two multi-port serial interfaces. I know that one has eight com ports and the other can support 64 but only has 32 ports installed. Give me a day or two to dig them out (if I still have them) -- they were both working fine when removed from service and Drivers are available (just checked their website). PCI bus. DB-25 connectors. http://www.digi.com/ Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of li...@lazygranch.com Sent: Tuesday, May 22, 2012 05:14 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Serial port server .. any interest in a writeup onusing ? For the maximum software compatibility, I'd go for the multiple port serial card. Next step up would be a PCI expansion chasis like a Magma using multiple serial cards. I got one on ebay and PCI slots work like the real thing under both linux and windows. I use it for multiple soundcards, but it works for any PCI card. The only trick is to power the PCI expansion chassis before booting. -Original Message- From: J. L. Trantham jlt...@att.net Sender: time-nuts-boun...@febo.com Date: Tue, 22 May 2012 06:54:02 To: 'Discussion of precise time and frequency measurement'time-nuts@febo.com Reply-To: Discussion of precise time and frequency measurement time-nuts@febo.com Subject: Re: [time-nuts] Serial port server .. any interest in a write up onusing ? Pete, I would like to hear more about this. Consider me an infant in 'network' and use really simple terms. I have an old Dell computer that runs Win2KPro with two serial ports built in that was discarded by my office. I use it to communicate with a TBolt and a Z3816A. The ability to communicate with several other serial ports would be beneficial but the thought of getting several PCI/Serial cards for the computer seemed like the only option. I would love to hear of other options, particularly for 'pennies'. Joe -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Pete Lancashire Sent: Monday, May 21, 2012 9:55 PM To: Discussion of precise time and frequency measurement Subject: [time-nuts] Serial port server .. any interest in a write up onusing ? Like many time-nuts I have quite a few devices that communicate to the outside world with a serial port. And like many I have more then one. In a past life I use to have to connect to sometimes a 100 RS232 in one location. A popular device is called a terminal server or concentrator. They would take from 1 to 48 RS232 ports on one side and let you talk to them via an Ethernet interface. I so far have twelve RS232 ports in use. Now that the need for such devices has diminished, these terminal servers are showing up, sometimes for pennies. One brand and model Digi's TS family of models I and have verified they work with Lady Heather and Trimble Studio on a Windows XP PC. Digi offers for free a program that makes each RS232 Port look like a COM port, and after configuring the terminal server, and this driver, you just just fire up Lady Heather pointing to the correct COM Port. Other RS232 ports on the terminal server can either be COM ports, or one can be connected to via Telnet of for security SSH. For example I have an Odetics on one port and I just enter telnet ts4a (the DNS name I gave one of the terminal servers) 2003 (the IP port associated with the third RS232 port). So if this is of interest to anyone I'll go into more detail, models, setup etc. -pete -pete ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Serial port server .. any interest in a write up on using ?
I've played with a Lantronix single port server and a Digi 16 port server with no problems for simple COM port emulation. But I wonder if they would work well with an NTP server. Has anyone tested that? Is the network delay a problem due to either amount of delay or variation in the delay? Ed I've tried one serial-USB converter for NTP. The box passed the DCD line, which was essential to get the PPS signal through. Performance was not as good as a direct connection, but better than LAN sync alone. See: http://www.satsignal.eu/ntp/NTP-on-Windows-serial-port.html#usb I haven't tried an Ethernet connected terminal server - I would hope it was better than USB, but I don't know. Cheers, David -- SatSignal software - quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
