Re: V.11, X.21, and RS232 are =
What is the difference between balanced and unbalanced? I didn't find any info or urls regarding the V.11 Thank you ! On Wed, 3 Jan 2001 18:48:27 -0500, mikey wrote: Basicly rs-232 and v.24 are the same standard. rs232 is the eia/tia standard and v.24 is the itu standard. Generally used for low speed unbalanced circuits. i'm not sure about v.11, couldn't find that in my refs. x.21 is another serial line standard, very common in europe and africa. Generally use for balanced, higher speeds circuits. Voltage levels and signals are different from than rs232. Not compatible. Although I have gotten a x.21 interface to talk to a rs530 interface at low speed, less than 64 k. hope this helps. I have seen pin outs and interface specs on cisco web site. don't have the url. should be easy to find with a site search. mikey - Original Message - From: John lay [EMAIL PROTECTED] To: mikey [EMAIL PROTECTED] Sent: Wednesday, January 03, 2001 4:38 AM Subject: Re: V.11, X.21, and RS232 are = Hi, Could you point to a URL that can explain each one or the differences between them or could you give more info. Thanks ! On Sun, 31 Dec 2000 22:53:42 -0500, mikey wrote: No John lay [EMAIL PROTECTED] wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... Guys, are the V.11, X.21 and the RS232 are the same interface. Thanks ___ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/ _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] ___ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/ ___ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/ _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: V.11, X.21, and RS232 are =
Balanced uses 2 wires for Tx and two wires for Rx.
The signal is inverted on one of the wires (ie signal on TxA is opposite
polarity to TxB) This has the effect of making the signal more resilient to
noise(Any noise present on both wires will have little effect as the signal
is derived from the difference between the two wires, which will remain the
same (ish))
Unbalanced uses one Tx wire, one Rx wire and a signal reference or ground.
The control signals/clocking for both use the same format as the data wires.
x21 specifies a DB15 connector, all of its pin assignments etc etc.
From what I remember, V11 does not specify the physical interface, just the
voltage levels etc. so an interface can be V11/X21.
"John lay" [EMAIL PROTECTED] wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
What is the difference between balanced and unbalanced?
I didn't find any info or urls regarding the V.11
Thank you !
On Wed, 3 Jan 2001 18:48:27 -0500, mikey wrote:
Basicly rs-232 and v.24 are the same standard. rs232 is the eia/tia
standard and v.24 is the itu standard. Generally used for low speed
unbalanced circuits. i'm not sure about v.11, couldn't find that in my
refs.
x.21 is another serial line standard, very common in europe and africa.
Generally use for balanced, higher speeds circuits. Voltage levels
and
signals are different from than rs232. Not compatible. Although I
have
gotten a x.21 interface to talk to a rs530 interface at low speed, less
than
64 k.
hope this helps. I have seen pin outs and interface specs on cisco web
site. don't have the url. should be easy to find with a site search.
mikey
- Original Message -
From: John lay [EMAIL PROTECTED]
To: mikey [EMAIL PROTECTED]
Sent: Wednesday, January 03, 2001 4:38 AM
Subject: Re: V.11, X.21, and RS232 are =
Hi,
Could you point to a URL that can explain each one or the differences
between them or could you give more info.
Thanks !
On Sun, 31 Dec 2000 22:53:42 -0500, mikey wrote:
No
John lay [EMAIL PROTECTED] wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
Guys,
are the V.11, X.21 and the RS232 are the same interface.
Thanks
___
Send a cool gift with your E-Card
http://www.bluemountain.com/giftcenter/
_
FAQ, list archives, and subscription info:
http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to
[EMAIL PROTECTED]
_
FAQ, list archives, and subscription info:
http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to
[EMAIL PROTECTED]
___
Send a cool gift with your E-Card
http://www.bluemountain.com/giftcenter/
___
Send a cool gift with your E-Card
http://www.bluemountain.com/giftcenter/
_
FAQ, list archives, and subscription info:
http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
_
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: V.11, X.21, and RS232 are =
No John lay [EMAIL PROTECTED] wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... Guys, are the V.11, X.21 and the RS232 are the same interface. Thanks ___ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/ _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
V.11, X.21, and RS232 are =
Guys, are the V.11, X.21 and the RS232 are the same interface. Thanks ___ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/ _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
