Re: OT: FXO FXS terminology - comments? [7:54331]
On Feb 17, 1:09pm, "Priscilla Oppenheimer" wrote: } Bruce Enders wrote: } > } > The simplest way I know of to explain these is to take the last } > letter } > (O or S) and associate that to where it will connect TO. So, an } > FXO } > connects to an Office (PBX or CO) and an FXS connects to a } > Station device } > (Telephone, Fax, or answering machine). This is correct. } The problem with that way of remembering it is that it contradicts what you No, there is no contradiction. A port is named for the type of device that connects to it. It is actually the opposite type of device. } say below. FXS connects TO FXO, not to a station. If you remember that a An FXS port connects to an FXO port. Don't confuse port with device. } phone is not a station, in fact it's an FXO, then you won't get in trouble. No, a phone is a Station. You must remember that a port is named for the type of device that connects to it. } > As Chuck suggests, if you are connecting from an "O" it will connect to } > an "S", and vice versa, just like DTE and DCE. (Remembering it this way } > comes in handy when you are connecting two PBXs, or PBX to CO, or voice } > gateway to PBX or CO). OBTW, that voice gateway is a microscopic size } > PBX. Correct. }-- End of excerpt from "Priscilla Oppenheimer" Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=55672&t=54331 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: OT: FXO FXS terminology - comments? [7:54331]
On Feb 17, 1:19pm, "Priscilla Oppenheimer" wrote: } John Neiberger wrote: } > } > So, the FXS or FXO port on the router is labeled from the } > perspective of } > the device that connects to it? Yes, it is. } NO. It's labelled as what it IS. NO! It is labelled as the opposite (i.e. the type of device that connects to it). } In other words, a station } > connects to } > an FXS port? And a PBX connects to an FXO port? } } NO. YES! Actually, a PBX could connect to either type of port depending on what kind of interface you are using. } > This would be the opposite perspective from what they use when } > labelling their cabling, which is always from the perspective } > of the router. Think of ports, not cables. An ethernet port connects to an ethernet device. A serial port connects to a serial device. Etc. } > This is all very confusing. :-( Either I'm continually } > misunderstanding the examples or several of us have a major You seem to have it right. } > misunderstanding when it comes to this stuff. Neither Yes, several people seem to be misunderstanding it. Given that most people here are data people, not voice people that is quite understandable. I did voice (started with ISDN, which is really data) before I did data. I still do a moderate amount of voice. } > situation is good. I'll agree with this point. }-- End of excerpt from "Priscilla Oppenheimer" Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=55673&t=54331 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: OT: FXO FXS terminology - comments? [7:54331]
On Feb 17, 11:35am, "Priscilla Oppenheimer" wrote: } } I learned voice from Randy Fischer, a brilliant engineer and helpful teacher } who works for Advanced Network Information, a Cisco training partner. Well, } at least he used to work there. I haven't talked to him in ages. } } His way to help us remember what goes into what is to always remember that } FXS talks to FXO and a telephone is office equipment. Look at your desk. Yes, you can connect an FXS port directly to an FXO port. } You have a computer, a telephone. It's office equipment. So it plugs into an This is extremely silly. Telephones are found in all sorts of places: houses, cars, offices, outdoors, etc. Does this mean that the type of device that a telephone is depends on where it is physically located? In any case, this is telephony terminology. A telephone is most definitely not an Office device. An Office is what the telco has (i.e. CO -- Central Office). A telephone is a Station. }-- End of excerpt from "Priscilla Oppenheimer" Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=55674&t=54331 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: OT: FXO FXS terminology - comments? [7:54331]
On Feb 17, 11:30am, "Chuck's Long Road" wrote: } } The "Cisco Call Manager Fundamentals" book makes the rather brief assertion } that "FXS ports provide connection to loop-start or ground-start telephone } lines, ... ( PBX ) ports, and other analogue telephone devices. FXO ports } provide connection to central office ports or PBX extensions" } } Interesting wording, and seems to apply to what I was told. It would be better worded as "FXS ports provide telephone lines...". Note that he says that FXS ports connect to analogue telephone devices, which is the opposite of what you said in your previous e-mail. }-- End of excerpt from "Chuck's Long Road" Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=55675&t=54331 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: OT: FXO FXS terminology - comments? [7:54331]
On Feb 17, 10:46am, "Chuck's Long Road" wrote: } } In other words, an analog telephone set is an FXO device, and therefore No, an analogue telephone is an FXS device (an Office is what the telco has). The ports are named for the type of device that plugs into them. } Similarly, a PBX, or a CO switch, for that matter, is an FXS device that } provides signaling, and therefore plugs into an FXO port. No, CO = Central Office, i.e. it is most definitely an Office device. Stations do not provide signalling. A PBX sits between a CO and Station devices and therefore has both types of ports on it. Where you plug it in depends on what you are trying to do with it. } Any comments? Reasonable way to think of things? Nope. The ports are named for the type of devices that plug into them, similar to ethernet, serial, GBIC, etc. }-- End of excerpt from "Chuck's Long Road" Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=55679&t=54331 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: OT: FXO FXS terminology - comments? [7:54331]
On Feb 17, 2:01pm, "Priscilla Oppenheimer" wrote: } Priscilla Oppenheimer wrote: } > John Neiberger wrote: } > > } > > So, the FXS or FXO port on the router is labeled from the } > > perspective of the device that connects to it? } > } > NO. It's labelled as what it IS. } > } > > In other words, a station connects to } > > an FXS port? And a PBX connects to an FXO port? } > } > NO. } } The large NO might be a bit mis-placed. ;-) Yep. } Yes, you connect a phone to a router's FXS port. That's not because the } phone is a station, however. (That's what the NO referred to.) It's becaue Yes, a phone is a station. } the phone is an FXO device. No, it is most definitely not an FXO device. } FXS goes to FXO and vice versa. Yes. } Yes a PBX connects to a router's FXO port. The PBX uses an FXS port in this A PBX can connect to either type of port. } right? What do PBXes connect? Phones. From the router's point of view, the PBXs are switches that connect between COs and Stations. (Usually there are more Stations then trunk lines.) } router is getting dial tone, etc. from the PBX. The router is an FXO in this It can happen either way. } case. The router interface is labeled with what it is, as mentioned. No, the router interface is labelled for the type of device that connects to it. }-- End of excerpt from "Priscilla Oppenheimer" Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=55681&t=54331 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: OT: FXO FXS terminology - comments? [7:54331]
On Feb 17, 4:46pm, "Chuck's Long Road" wrote: } } so far as I know, this will not work. Cisco's IP phones are ethernet } devices, and must connect to a switch port. Well, you could use a hub if Yes. } IP phones are more akin to PC's, servers, etc, and you can't plug a PC into } either an FXO or FXS port either. at least not and get it to do anything } useful. Yes. } FXS and FXO are for telco connections only. FXS for analogue phone or fax. } FXO for connection to PBX or telco CO. Yes (with the caveat that PBXs have both types of ports). } Have we settled this question - that an FXS port provides telco signaling to } an FXO device? No. An FXS port provides telco signalling (i.e. it acts an Office) to an FXS (Station) device. }-- End of excerpt from "Chuck's Long Road" Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=55683&t=54331 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: OT: FXO FXS terminology - comments? [7:54331]
That sounds great and makes more sense now! I always like reading your posts :-) I always confuse which device plugs into which port. I remember it like this: Plug phone or "Station" into FXS (where Station=S) Plug PBX/CO into FXO (where Office=0) - Jennifer Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=54332&t=54331 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: OT: FXO FXS terminology - comments? [7:54331]
This has always been confusing to me. I think that the phone would be considered a station and should be an FXS device, while the upstream connection (thinking of Central OFFICE here) should be an FXO. :-) But that would be backwards from how it really is. I think. If I were to install Cisco VoIP gear right now for someone I'd probably order the wrong modules and have everything connected incorrectly. John >>> "Chuck's Long Road" 9/27/02 10:11:09 AM >>> Someone smarter than I made the following statements about FXO / FXS, in order to help me understand real world connectivity. That person said to think of FXO / FXS as something analogous to DTE / DCE. That is, DTE connects to DCE ( and visa versa ) and that FXO connects to FXS ( and visa versa ) In other words, an analog telephone set is an FXO device, and therefore plugs into an FXS port. The FXS port provides the signaling to the FXO device. Similarly, a PBX, or a CO switch, for that matter, is an FXS device that provides signaling, and therefore plugs into an FXO port. This seems to fit in with what I know - that you connect a router to a PBX or to the telco CO switch via an FXO port, and you connect an analogue fax or telephone into a router FXS port. Any comments? Reasonable way to think of things? Thanks. Chuck Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=54333&t=54331 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: OT: FXO FXS terminology - comments? [7:54331]
I did some quick looks into a couple of books I have to see what they say. Scott Keagy's book "Integrating Voice and Data Networks" has nothing to say about FXO and FXS in particular. The "Cisco Call Manager Fundamentals" book makes the rather brief assertion that "FXS ports provide connection to loop-start or ground-start telephone lines, ... ( PBX ) ports, and other analogue telephone devices. FXO ports provide connection to central office ports or PBX extensions" Interesting wording, and seems to apply to what I was told. Learn something new, some better way to think about things, every day. Chuck ""Jennifer Mellone"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > That sounds great and makes more sense now! I always like reading your posts > :-) > > I always confuse which device plugs into which port. I remember it like this: > > Plug phone or "Station" into FXS (where Station=S) > Plug PBX/CO into FXO (where Office=0) > > - Jennifer Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=54335&t=54331 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: OT: FXO FXS terminology - comments? [7:54331]
Yes, I think that's a great way to explain it. It helps with the telephony example as well as helps newbies learning DTE/DCE. There's a discussion about DTE/DCE going on right now in the Associates group. I was thinking about using a telephone example to try to help. I learned voice from Randy Fischer, a brilliant engineer and helpful teacher who works for Advanced Network Information, a Cisco training partner. Well, at least he used to work there. I haven't talked to him in ages. His way to help us remember what goes into what is to always remember that FXS talks to FXO and a telephone is office equipment. Look at your desk. You have a computer, a telephone. It's office equipment. So it plugs into an FXS port. He says it better. It helped me anyway. ;-) ___ Priscilla Oppenheimer www.troubleshootingnetworks.com www.priscilla.com Chuck's Long Road wrote: > > Someone smarter than I made the following statements about FXO > / FXS, in > order to help me understand real world connectivity. > > That person said to think of FXO / FXS as something analogous > to DTE / DCE. > > That is, DTE connects to DCE ( and visa versa ) and that FXO > connects to FXS > ( and visa versa ) > > In other words, an analog telephone set is an FXO device, and > therefore > plugs into an FXS port. The FXS port provides the signaling to > the FXO > device. > > Similarly, a PBX, or a CO switch, for that matter, is an FXS > device that > provides signaling, and therefore plugs into an FXO port. > > This seems to fit in with what I know - that you connect a > router to a PBX > or to the telco CO switch via an FXO port, and you connect an > analogue fax > or telephone into a router FXS port. > > Any comments? Reasonable way to think of things? > > Thanks. > > Chuck > > Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=54337&t=54331 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: OT: FXO FXS terminology - comments? [7:54331]
In Ciscoland FXS provides line voltage, ring etc., where as FXO is leading you out to the PSTN or to a PBX -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Jennifer Mellone Sent: Friday, September 27, 2002 12:27 PM To: [EMAIL PROTECTED] Subject: RE: OT: FXO FXS terminology - comments? [7:54331] That sounds great and makes more sense now! I always like reading your posts :-) I always confuse which device plugs into which port. I remember it like this: Plug phone or "Station" into FXS (where Station=S) Plug PBX/CO into FXO (where Office=0) - Jennifer Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=54339&t=54331 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: OT: FXO FXS terminology - comments? [7:54331]
You can also connect DTE to DTE, as well as DCE to DCE, via null-modem cable. So, analogy with FXO/FSO is not correct. Sasa Chuck's Long Road wrote: > > Someone smarter than I made the following statements about FXO / FXS, in > order to help me understand real world connectivity. > > That person said to think of FXO / FXS as something analogous to DTE / DCE. > > That is, DTE connects to DCE ( and visa versa ) and that FXO connects to FXS > ( and visa versa ) > > In other words, an analog telephone set is an FXO device, and therefore > plugs into an FXS port. The FXS port provides the signaling to the FXO > device. > > Similarly, a PBX, or a CO switch, for that matter, is an FXS device that > provides signaling, and therefore plugs into an FXO port. > > This seems to fit in with what I know - that you connect a router to a PBX > or to the telco CO switch via an FXO port, and you connect an analogue fax > or telephone into a router FXS port. > > Any comments? Reasonable way to think of things? > > Thanks. > > Chuck Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=54340&t=54331 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: OT: FXO FXS terminology - comments? [7:54331]
Chuck, check out the voice over ip, frame and atm press book..its covered in there.. Chuck's Long Road wrote: >I did some quick looks into a couple of books I have to see what they say. > >Scott Keagy's book "Integrating Voice and Data Networks" has nothing to say >about FXO and FXS in particular. > >The "Cisco Call Manager Fundamentals" book makes the rather brief assertion >that "FXS ports provide connection to loop-start or ground-start telephone >lines, ... ( PBX ) ports, and other analogue telephone devices. FXO ports >provide connection to central office ports or PBX extensions" > >Interesting wording, and seems to apply to what I was told. > >Learn something new, some better way to think about things, every day. > >Chuck > > > > >""Jennifer Mellone"" wrote in message >[EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > >>That sounds great and makes more sense now! I always like reading your >> >posts > >>:-) >> >>I always confuse which device plugs into which port. I remember it like >> >this: > >>Plug phone or "Station" into FXS (where Station=S) >>Plug PBX/CO into FXO (where Office=0) >> >>- Jennifer -- Larry Letterman Network Engineer Cisco Systems Inc. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=54343&t=54331 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: OT: FXO FXS terminology - comments? [7:54331]
Sasa Milic wrote: > > You can also connect DTE to DTE, as well as DCE to DCE, via > null-modem > cable. So, analogy with FXO/FSO is not correct. I can connect two telephones together too, with a telephone line simulator. Also, to connect two routers back-to-back, you have to configure one to be DCE. My point? The analogy is still "correct" even if there are a few "yes, buts" that you can add to it. Anyone can add "yes buts." Coming up with the good idea to start with is the hard part. :-) Priscilla > > Sasa > > Chuck's Long Road wrote: > > > > Someone smarter than I made the following statements about > FXO / FXS, in > > order to help me understand real world connectivity. > > > > That person said to think of FXO / FXS as something analogous > to DTE / DCE. > > > > That is, DTE connects to DCE ( and visa versa ) and that FXO > connects to FXS > > ( and visa versa ) > > > > In other words, an analog telephone set is an FXO device, and > therefore > > plugs into an FXS port. The FXS port provides the signaling > to the FXO > > device. > > > > Similarly, a PBX, or a CO switch, for that matter, is an FXS > device that > > provides signaling, and therefore plugs into an FXO port. > > > > This seems to fit in with what I know - that you connect a > router to a PBX > > or to the telco CO switch via an FXO port, and you connect an > analogue fax > > or telephone into a router FXS port. > > > > Any comments? Reasonable way to think of things? > > > > Thanks. > > > > Chuck > > Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=54351&t=54331 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: OT: FXO FXS terminology - comments? [7:54331]
The simplest way I know of to explain these is to take the last letter (O or S) and associate that to where it will connect TO. So, an FXO connects to an Office (PBX or CO) and an FXS connects to a Station device (Telephone, Fax, or answering machine). As Chuck suggests, if you are connecting from an "O" it will connect to an "S", and vice versa, just like DTE and DCE. (Remembering it this way comes in handy when you are connecting two PBXs, or PBX to CO, or voice gateway to PBX or CO). OBTW, that voice gateway is a microscopic size PBX. Bruce Chuck's Long Road wrote: I did some quick looks into a couple of books I have to see what they say. Scott Keagy's book "Integrating Voice and Data Networks" has nothing to say about FXO and FXS in particular. The "Cisco Call Manager Fundamentals" book makes the rather brief assertion that "FXS ports provide connection to loop-start or ground-start telephone lines, ... ( PBX ) ports, and other analogue telephone devices. FXO ports provide connection to central office ports or PBX extensions" Interesting wording, and seems to apply to what I was told. Learn something new, some better way to think about things, every day. Chuck ""Jennifer Mellone"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED] ... That sounds great and makes more sense now! I always like reading your posts :-) I always confuse which device plugs into which port. I remember it like this: Plug phone or "Station" into FXS (where Station=S) Plug PBX/CO into FXO (where Office=0) - Jennifer -- Bruce Enders Email: [EMAIL PROTECTED] Chesapeake NetCraftsmeno:(410)-757-3050, c:(443)-994-0678 1290 Bay Dale Drive, Suite 312 WWW: http://www.netcraftsmen.net Arnold, MD 21012-2325 Cisco CCSI# 96047 Efax 443-331-0651 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=54352&t=54331 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: OT: FXO FXS terminology - comments? [7:54331]
Bruce Enders wrote: > > The simplest way I know of to explain these is to take the last > letter > (O or S) and associate that to where it will connect TO. So, an > FXO > connects to an Office (PBX or CO) and an FXS connects to a > Station device > (Telephone, Fax, or answering machine). The problem with that way of remembering it is that it contradicts what you say below. FXS connects TO FXO, not to a station. If you remember that a phone is not a station, in fact it's an FXO, then you won't get in trouble. > As Chuck suggests, if you are connecting from an "O" it will > connect to > an "S", and vice versa, just like DTE and DCE. (Remembering it > this way > comes in handy when you are connecting two PBXs, or PBX to CO, > or voice > gateway to PBX or CO). OBTW, that voice gateway is a > microscopic size > PBX. > Bruce > > Chuck's Long Road wrote: > > I did some quick looks into a couple of books I have to see > what they say. > > Scott Keagy's book "Integrating Voice and Data Networks" has > nothing to say > about FXO and FXS in particular. > > The "Cisco Call Manager Fundamentals" book makes the rather > brief assertion > that "FXS ports provide connection to loop-start or > ground-start telephone > lines, ... ( PBX ) ports, and other analogue telephone > devices. FXO ports > provide connection to central office ports or PBX extensions" > > Interesting wording, and seems to apply to what I was told. > > Learn something new, some better way to think about things, > every day. > > Chuck > > ""Jennifer Mellone"" wrote in message > [EMAIL PROTECTED]">news:[EMAIL PROTECTED] ... > > That sounds great and makes more sense now! I always like > reading your > > posts > > :-) > > I always confuse which device plugs into which port. I > remember it like > > this: > > Plug phone or "Station" into FXS (where Station=S) > Plug PBX/CO into FXO (where Office=0) > > - Jennifer > -- > > Bruce Enders Email: > [EMAIL PROTECTED] Chesapeake NetCraftsmen > o:(410)-757-3050, c:(443)-994-0678 > 1290 Bay Dale Drive, Suite 312 WWW: > http://www.netcraftsmen.net Arnold, MD 21012-2325 > Cisco CCSI# 96047 > Efax 443-331-0651 > > Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=54354&t=54331 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: OT: FXO FXS terminology - comments? [7:54331]
John Neiberger wrote: > > So, the FXS or FXO port on the router is labeled from the > perspective of > the device that connects to it? NO. It's labelled as what it IS. In other words, a station > connects to > an FXS port? And a PBX connects to an FXO port? NO. > > This would be the opposite perspective from what they use when > labelling their cabling, which is always from the perspective > of the > router. > > This is all very confusing. :-( Either I'm continually > misunderstanding the examples or several of us have a major > misunderstanding when it comes to this stuff. Neither > situation is > good. > > John > > >>> "Bruce Enders" 9/27/02 12:23:28 > PM >>> > The simplest way I know of to explain these is to take the last > letter > (O or S) and associate that to where it will connect TO. So, an > FXO > connects to an Office (PBX or CO) and an FXS connects to a > Station > device > (Telephone, Fax, or answering machine). > As Chuck suggests, if you are connecting from an "O" it will > connect > to > an "S", and vice versa, just like DTE and DCE. (Remembering it > this > way > comes in handy when you are connecting two PBXs, or PBX to CO, > or > voice > gateway to PBX or CO). OBTW, that voice gateway is a > microscopic size > PBX. > Bruce > > Chuck's Long Road wrote: > > I did some quick looks into a couple of books I have to see > what they > say. > > Scott Keagy's book "Integrating Voice and Data Networks" has > nothing > to say > about FXO and FXS in particular. > > The "Cisco Call Manager Fundamentals" book makes the rather > brief > assertion > that "FXS ports provide connection to loop-start or > ground-start > telephone > lines, ... ( PBX ) ports, and other analogue telephone > devices. FXO > ports > provide connection to central office ports or PBX extensions" > > Interesting wording, and seems to apply to what I was told. > > Learn something new, some better way to think about things, > every > day. > > Chuck > > ""Jennifer Mellone"" wrote in message > [EMAIL PROTECTED]">news:[EMAIL PROTECTED] ... > > That sounds great and makes more sense now! I always like > reading > your > > posts > > :-) > > I always confuse which device plugs into which port. I > remember it > like > > this: > > Plug phone or "Station" into FXS (where Station=S) > Plug PBX/CO into FXO (where Office=0) > > - Jennifer > -- > > Bruce Enders Email: > [EMAIL PROTECTED] > Chesapeake NetCraftsmeno:(410)-757-3050, > c:(443)-994-0678 > 1290 Bay Dale Drive, Suite 312 WWW: > http://www.netcraftsmen.net > Arnold, MD 21012-2325 Cisco CCSI# 96047 > Efax 443-331-0651 > > Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=54358&t=54331 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: OT: FXO FXS terminology - comments? [7:54331]
So, the FXS or FXO port on the router is labeled from the perspective of the device that connects to it? In other words, a station connects to an FXS port? And a PBX connects to an FXO port? This would be the opposite perspective from what they use when labelling their cabling, which is always from the perspective of the router. This is all very confusing. :-( Either I'm continually misunderstanding the examples or several of us have a major misunderstanding when it comes to this stuff. Neither situation is good. John >>> "Bruce Enders" 9/27/02 12:23:28 PM >>> The simplest way I know of to explain these is to take the last letter (O or S) and associate that to where it will connect TO. So, an FXO connects to an Office (PBX or CO) and an FXS connects to a Station device (Telephone, Fax, or answering machine). As Chuck suggests, if you are connecting from an "O" it will connect to an "S", and vice versa, just like DTE and DCE. (Remembering it this way comes in handy when you are connecting two PBXs, or PBX to CO, or voice gateway to PBX or CO). OBTW, that voice gateway is a microscopic size PBX. Bruce Chuck's Long Road wrote: I did some quick looks into a couple of books I have to see what they say. Scott Keagy's book "Integrating Voice and Data Networks" has nothing to say about FXO and FXS in particular. The "Cisco Call Manager Fundamentals" book makes the rather brief assertion that "FXS ports provide connection to loop-start or ground-start telephone lines, ... ( PBX ) ports, and other analogue telephone devices. FXO ports provide connection to central office ports or PBX extensions" Interesting wording, and seems to apply to what I was told. Learn something new, some better way to think about things, every day. Chuck ""Jennifer Mellone"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED] ... That sounds great and makes more sense now! I always like reading your posts :-) I always confuse which device plugs into which port. I remember it like this: Plug phone or "Station" into FXS (where Station=S) Plug PBX/CO into FXO (where Office=0) - Jennifer -- Bruce Enders Email: [EMAIL PROTECTED] Chesapeake NetCraftsmeno:(410)-757-3050, c:(443)-994-0678 1290 Bay Dale Drive, Suite 312 WWW: http://www.netcraftsmen.net Arnold, MD 21012-2325 Cisco CCSI# 96047 Efax 443-331-0651 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=54357&t=54331 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: OT: FXO FXS terminology - comments? [7:54331]
Priscilla Oppenheimer wrote: > > John Neiberger wrote: > > > > So, the FXS or FXO port on the router is labeled from the > > perspective of > > the device that connects to it? > > NO. It's labelled as what it IS. > > In other words, a station > > connects to > > an FXS port? And a PBX connects to an FXO port? > > NO. The large NO might be a bit mis-placed. ;-) Yes, you connect a phone to a router's FXS port. That's not because the phone is a station, however. (That's what the NO referred to.) It's becaue the phone is an FXO device. FXS goes to FXO and vice versa. Yes a PBX connects to a router's FXO port. The PBX uses an FXS port in this case. From the PBX point of view, it's connecting a phone. Makes sense right? What do PBXes connect? Phones. From the router's point of view, the router is getting dial tone, etc. from the PBX. The router is an FXO in this case. The router interface is labeled with what it is, as mentioned. OK, I will stop writing messages on this topic. I should just turn my computer off. ;-) Priscilla > > > > > This would be the opposite perspective from what they use when > > labelling their cabling, which is always from the perspective > > of the > > router. > > > > This is all very confusing. :-( Either I'm continually > > misunderstanding the examples or several of us have a major > > misunderstanding when it comes to this stuff. Neither > > situation is > > good. > > > > John > > > > >>> "Bruce Enders" 9/27/02 12:23:28 > > PM >>> > > The simplest way I know of to explain these is to take the > last > > letter > > (O or S) and associate that to where it will connect TO. So, > an > > FXO > > connects to an Office (PBX or CO) and an FXS connects to a > > Station > > device > > (Telephone, Fax, or answering machine). > > As Chuck suggests, if you are connecting from an "O" it will > > connect > > to > > an "S", and vice versa, just like DTE and DCE. (Remembering it > > this > > way > > comes in handy when you are connecting two PBXs, or PBX to CO, > > or > > voice > > gateway to PBX or CO). OBTW, that voice gateway is a > > microscopic size > > PBX. > > Bruce > > > > Chuck's Long Road wrote: > > > > I did some quick looks into a couple of books I have to see > > what they > > say. > > > > Scott Keagy's book "Integrating Voice and Data Networks" has > > nothing > > to say > > about FXO and FXS in particular. > > > > The "Cisco Call Manager Fundamentals" book makes the rather > > brief > > assertion > > that "FXS ports provide connection to loop-start or > > ground-start > > telephone > > lines, ... ( PBX ) ports, and other analogue telephone > > devices. FXO > > ports > > provide connection to central office ports or PBX > extensions" > > > > Interesting wording, and seems to apply to what I was told. > > > > Learn something new, some better way to think about things, > > every > > day. > > > > Chuck > > > > ""Jennifer Mellone"" wrote in message > > [EMAIL PROTECTED]">news:[EMAIL PROTECTED] ... > > > > That sounds great and makes more sense now! I always like > > reading > > your > > > > posts > > > > :-) > > > > I always confuse which device plugs into which port. I > > remember it > > like > > > > this: > > > > Plug phone or "Station" into FXS (where Station=S) > > Plug PBX/CO into FXO (where Office=0) > > > > - Jennifer > > -- > > > > Bruce Enders Email: > > [EMAIL PROTECTED] > > Chesapeake NetCraftsmeno:(410)-757-3050, > > c:(443)-994-0678 > > 1290 Bay Dale Drive, Suite 312 WWW: > > http://www.netcraftsmen.net > > Arnold, MD 21012-2325 Cisco CCSI# 96047 > > Efax 443-331-0651 > > > > > > Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=54363&t=54331 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: OT: FXO FXS terminology - comments? [7:54331]
I'm wondering about buying a couple of Cisco Phones 7960 and a FXS card for 2600 and play with it. Will I be able to have a good voice lab only with that? Maybe a FXO card and connect it in a regular phone line, is it possible? - Original Message - From: "Priscilla Oppenheimer" To: Sent: Friday, September 27, 2002 3:25 PM Subject: Re: OT: FXO FXS terminology - comments? [7:54331] [...] > Yes, you connect a phone to a router's FXS port. That's not because the > phone is a station, however. (That's what the NO referred to.) It's becaue > the phone is an FXO device. > > FXS goes to FXO and vice versa. > > Yes a PBX connects to a router's FXO port. The PBX uses an FXS port in this > case. From the PBX point of view, it's connecting a phone. Makes sense > right? What do PBXes connect? Phones. From the router's point of view, the > router is getting dial tone, etc. from the PBX. The router is an FXO in this > case. The router interface is labeled with what it is, as mentioned. > > OK, I will stop writing messages on this topic. I should just turn my > computer off. ;-) [...] Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=54377&t=54331 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: OT: FXO FXS terminology - comments? [7:54331]
Checking to see if my post is being filtered due to content or if there is some other problem... Chuck's Long Road wrote: > > Someone smarter than I made the following statements about FXO > / FXS, in > order to help me understand real world connectivity. > > That person said to think of FXO / FXS as something analogous > to DTE / DCE. > > That is, DTE connects to DCE ( and visa versa ) and that FXO > connects to FXS > ( and visa versa ) > > In other words, an analog telephone set is an FXO device, and > therefore > plugs into an FXS port. The FXS port provides the signaling to > the FXO > device. > > Similarly, a PBX, or a CO switch, for that matter, is an FXS > device that > provides signaling, and therefore plugs into an FXO port. > > This seems to fit in with what I know - that you connect a > router to a PBX > or to the telco CO switch via an FXO port, and you connect an > analogue fax > or telephone into a router FXS port. > > Any comments? Reasonable way to think of things? > > Thanks. > > Chuck > > Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=54383&t=54331 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: OT: FXO FXS terminology - comments? [7:54331]
so far as I know, this will not work. Cisco's IP phones are ethernet devices, and must connect to a switch port. Well, you could use a hub if you're looking for trouble. ;-> IP phones are more akin to PC's, servers, etc, and you can't plug a PC into either an FXO or FXS port either. at least not and get it to do anything useful. FXS and FXO are for telco connections only. FXS for analogue phone or fax. FXO for connection to PBX or telco CO. Have we settled this question - that an FXS port provides telco signaling to an FXO device? Chuck -- www.chuckslongroad.info like my web site? take the survey! ""Daniel Lafraia"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > I'm wondering about buying a couple of Cisco Phones 7960 and a FXS card for > 2600 and play with it. Will I be able to have a good voice lab only with > that? Maybe a FXO card and connect it in a regular phone line, is it > possible? > > - Original Message - > From: "Priscilla Oppenheimer" > To: > Sent: Friday, September 27, 2002 3:25 PM > Subject: Re: OT: FXO FXS terminology - comments? [7:54331] > > > [...] > > > Yes, you connect a phone to a router's FXS port. That's not because the > > phone is a station, however. (That's what the NO referred to.) It's becaue > > the phone is an FXO device. > > > > FXS goes to FXO and vice versa. > > > > Yes a PBX connects to a router's FXO port. The PBX uses an FXS port in > this > > case. From the PBX point of view, it's connecting a phone. Makes sense > > right? What do PBXes connect? Phones. From the router's point of view, the > > router is getting dial tone, etc. from the PBX. The router is an FXO in > this > > case. The router interface is labeled with what it is, as mentioned. > > > > OK, I will stop writing messages on this topic. I should just turn my > > computer off. ;-) > > [...] Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=54384&t=54331 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: OT: FXO FXS terminology - comments? [7:54331]
I used to deploy small portable satcom packages for a living. One of the things I was routinely asked to do was to provide local Tampa dial tone to my customers no matter where in the world they traveled. So we would connect a device known as a Multi-Rate Voice Card (essentially just a codec with a couple of compression algorithms) to the local telephone system on one side and the satcom gateway on the other (digital) side. It was configured as FXO (it was the office side of the equation). This simply told the device how to behave. That is, how to handle signaling on the 2-wire loop, such as wink-start, off hook, ring voltage, etc. On the deployed side, we would plug a telephone into a MRVC configured as FXS (it was the subscriber side of the equation). Again, this simply told the MRVC how to behave. Of course, the digital side of the FXS MRVC was connected to the digital side of the FXO MRVC via the satellite link. Tampa_switch--(analog)FXO-MRVC(digital)--gateway--satellite--gateway--(digital)FXS-MRVC(analog)--telephone The 2-wire port on the telephone switch in Tampa knew nothing about any of this. As far as it could tell, there was a local telephone hanging off of it. I think it might be a stretch to move those FXO/FXS labels out to the telephone instruments. I always thought that it only applied to devices, usually in the middle, that needed to know how to behave. And a telephone has no identity crisis that needs to be addressed. Having said all that, I dont see any harm in calling a telephone an FXO device, as long as its appreciated that FXO/FXS have more to do with defining behavior than simply applying labels. Chuck's Long Road wrote: > > Someone smarter than I made the following statements about FXO > / FXS, in > order to help me understand real world connectivity. > > That person said to think of FXO / FXS as something analogous > to DTE / DCE. > > That is, DTE connects to DCE ( and visa versa ) and that FXO > connects to FXS > ( and visa versa ) > > In other words, an analog telephone set is an FXO device, and > therefore > plugs into an FXS port. The FXS port provides the signaling to > the FXO > device. > > Similarly, a PBX, or a CO switch, for that matter, is an FXS > device that > provides signaling, and therefore plugs into an FXO port. > > This seems to fit in with what I know - that you connect a > router to a PBX > or to the telco CO switch via an FXO port, and you connect an > analogue fax > or telephone into a router FXS port. > > Any comments? Reasonable way to think of things? > > Thanks. > > Chuck > > Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=54382&t=54331 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: OT: FXO FXS terminology - comments? [7:54331]
Yes we have settled the question. Most PBX's will probably use analog E&M if small, or Digital PRI/QSIG if larger. You can run an IP phone off of a router with ITS or SRST, but I probably shouldn't be telling you that without the caveat that you need a license for either service. Contact your local cisco account rep, blah, blah, blah... ""Chuck's Long Road"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > so far as I know, this will not work. Cisco's IP phones are ethernet > devices, and must connect to a switch port. Well, you could use a hub if > you're looking for trouble. ;-> > > IP phones are more akin to PC's, servers, etc, and you can't plug a PC into > either an FXO or FXS port either. at least not and get it to do anything > useful. > > FXS and FXO are for telco connections only. FXS for analogue phone or fax. > FXO for connection to PBX or telco CO. > > Have we settled this question - that an FXS port provides telco signaling to > an FXO device? > > Chuck > > -- > > www.chuckslongroad.info > like my web site? > take the survey! > > > > ""Daniel Lafraia"" wrote in message > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > I'm wondering about buying a couple of Cisco Phones 7960 and a FXS card > for > > 2600 and play with it. Will I be able to have a good voice lab only with > > that? Maybe a FXO card and connect it in a regular phone line, is it > > possible? > > > > - Original Message - > > From: "Priscilla Oppenheimer" > > To: > > Sent: Friday, September 27, 2002 3:25 PM > > Subject: Re: OT: FXO FXS terminology - comments? [7:54331] > > > > > > [...] > > > > > Yes, you connect a phone to a router's FXS port. That's not because the > > > phone is a station, however. (That's what the NO referred to.) It's > becaue > > > the phone is an FXO device. > > > > > > FXS goes to FXO and vice versa. > > > > > > Yes a PBX connects to a router's FXO port. The PBX uses an FXS port in > > this > > > case. From the PBX point of view, it's connecting a phone. Makes sense > > > right? What do PBXes connect? Phones. From the router's point of view, > the > > > router is getting dial tone, etc. from the PBX. The router is an FXO in > > this > > > case. The router interface is labeled with what it is, as mentioned. > > > > > > OK, I will stop writing messages on this topic. I should just turn my > > > computer off. ;-) > > > > [...] Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=54389&t=54331 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: OT: FXO FXS terminology - comments? [7:54331]
You can take a Cisco IP phone and connect it into a router? Well OK, I didn't consider an ethernet crossover cable, which I suppose should work. You aren't saying you could plug an IP phone into an FXS or FXO port, are you? one other comment below: -- www.chuckslongroad.info like my web site? take the survey! ""Steven A. Ridder"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Yes we have settled the question. Most PBX's will probably use analog E&M > if small, or Digital PRI/QSIG if larger. CL: or you plug a router FXO port into a PBX analogue port, correct? same as you would plug a telco 1mb into a router FXO port? > > You can run an IP phone off of a router with ITS or SRST, but I probably > shouldn't be telling you that without the caveat that you need a license for > either service. Contact your local cisco account rep, blah, blah, blah... > > > ""Chuck's Long Road"" wrote in message > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > so far as I know, this will not work. Cisco's IP phones are ethernet > > devices, and must connect to a switch port. Well, you could use a hub if > > you're looking for trouble. ;-> > > > > IP phones are more akin to PC's, servers, etc, and you can't plug a PC > into > > either an FXO or FXS port either. at least not and get it to do anything > > useful. > > > > FXS and FXO are for telco connections only. FXS for analogue phone or fax. > > FXO for connection to PBX or telco CO. > > > > Have we settled this question - that an FXS port provides telco signaling > to > > an FXO device? > > > > Chuck > > > > -- > > > > www.chuckslongroad.info > > like my web site? > > take the survey! > > > > > > > > ""Daniel Lafraia"" wrote in message > > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > > I'm wondering about buying a couple of Cisco Phones 7960 and a FXS card > > for > > > 2600 and play with it. Will I be able to have a good voice lab only with > > > that? Maybe a FXO card and connect it in a regular phone line, is it > > > possible? > > > > > > - Original Message - > > > From: "Priscilla Oppenheimer" > > > To: > > > Sent: Friday, September 27, 2002 3:25 PM > > > Subject: Re: OT: FXO FXS terminology - comments? [7:54331] > > > > > > > > > [...] > > > > > > > Yes, you connect a phone to a router's FXS port. That's not because > the > > > > phone is a station, however. (That's what the NO referred to.) It's > > becaue > > > > the phone is an FXO device. > > > > > > > > FXS goes to FXO and vice versa. > > > > > > > > Yes a PBX connects to a router's FXO port. The PBX uses an FXS port in > > > this > > > > case. From the PBX point of view, it's connecting a phone. Makes sense > > > > right? What do PBXes connect? Phones. From the router's point of view, > > the > > > > router is getting dial tone, etc. from the PBX. The router is an FXO > in > > > this > > > > case. The router interface is labeled with what it is, as mentioned. > > > > > > > > OK, I will stop writing messages on this topic. I should just turn my > > > > computer off. ;-) > > > > > > [...] Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=54401&t=54331 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: OT: FXO FXS terminology - comments? [7:54331]
I should have specified. I meant using an IP phone regularly, by pluging it into a switch. But a crossover cable would work I guess. FXO/FXS to IP Phones = no. -- RFC 1149 Compliant. ""Chuck's Long Road"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > You can take a Cisco IP phone and connect it into a router? Well OK, I > didn't consider an ethernet crossover cable, which I suppose should work. > You aren't saying you could plug an IP phone into an FXS or FXO port, are > you? > > one other comment below: > > -- > > www.chuckslongroad.info > like my web site? > take the survey! > > > > ""Steven A. Ridder"" wrote in message > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > Yes we have settled the question. Most PBX's will probably use analog E&M > > if small, or Digital PRI/QSIG if larger. > > CL: or you plug a router FXO port into a PBX analogue port, correct? same as > you would plug a telco 1mb into a router FXO port? > > > > > > You can run an IP phone off of a router with ITS or SRST, but I probably > > shouldn't be telling you that without the caveat that you need a license > for > > either service. Contact your local cisco account rep, blah, blah, blah... > > > > > > ""Chuck's Long Road"" wrote in message > > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > > so far as I know, this will not work. Cisco's IP phones are ethernet > > > devices, and must connect to a switch port. Well, you could use a hub if > > > you're looking for trouble. ;-> > > > > > > IP phones are more akin to PC's, servers, etc, and you can't plug a PC > > into > > > either an FXO or FXS port either. at least not and get it to do anything > > > useful. > > > > > > FXS and FXO are for telco connections only. FXS for analogue phone or > fax. > > > FXO for connection to PBX or telco CO. > > > > > > Have we settled this question - that an FXS port provides telco > signaling > > to > > > an FXO device? > > > > > > Chuck > > > > > > -- > > > > > > www.chuckslongroad.info > > > like my web site? > > > take the survey! > > > > > > > > > > > > ""Daniel Lafraia"" wrote in message > > > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > > > I'm wondering about buying a couple of Cisco Phones 7960 and a FXS > card > > > for > > > > 2600 and play with it. Will I be able to have a good voice lab only > with > > > > that? Maybe a FXO card and connect it in a regular phone line, is it > > > > possible? > > > > > > > > - Original Message - > > > > From: "Priscilla Oppenheimer" > > > > To: > > > > Sent: Friday, September 27, 2002 3:25 PM > > > > Subject: Re: OT: FXO FXS terminology - comments? [7:54331] > > > > > > > > > > > > [...] > > > > > > > > > Yes, you connect a phone to a router's FXS port. That's not because > > the > > > > > phone is a station, however. (That's what the NO referred to.) It's > > > becaue > > > > > the phone is an FXO device. > > > > > > > > > > FXS goes to FXO and vice versa. > > > > > > > > > > Yes a PBX connects to a router's FXO port. The PBX uses an FXS port > in > > > > this > > > > > case. From the PBX point of view, it's connecting a phone. Makes > sense > > > > > right? What do PBXes connect? Phones. From the router's point of > view, > > > the > > > > > router is getting dial tone, etc. from the PBX. The router is an FXO > > in > > > > this > > > > > case. The router interface is labeled with what it is, as mentioned. > > > > > > > > > > OK, I will stop writing messages on this topic. I should just turn > my > > > > > computer off. ;-) > > > > > > > > [...] Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=54425&t=54331 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
