V.35/RS-232 ???

V.35/RS-232 ???

Post by Jan Vercinski » Fri, 12 Feb 1999 04:00:00



Hello.

Normally Cisco's serial (DB-60) is connected to modem V.35 interface
with CAB-V35MT. Good. But if modem's interface card is V.35 with DB-25
connector. What is pinning for it? I'm confused, because commonly
DB-25 is used for RS-232, which use in asinch. communications. My situation:

V.35 interface card (DB-25)-cable DB-25 male/V.35 female (like
cisco)-CAB-V35MT

I'm not sure in correct pinning of this "cable". Pls, ideas, links...

brgd,

__________________________________________________________
Jan Vercinskij                          phone:  +370-2-730964
Telia Lithuania                         fax:    +370-2-730959

                                                http://www.telia.lt
__________________________________________________________

 
 
 

V.35/RS-232 ???

Post by p.. » Fri, 12 Feb 1999 04:00:00


Hi,

If you are dealing with high speed serial ( >100 Kb/s) in a DB25
interface you are undoubtably dealing with an RS530 interface.  This is
RS449 in a DB25 interface.  If you have a Black Box catalog they have
all the pin outs of the common interface types including RS530 in the
back the last time I looked.  RS530 is not pin for pin compatable with
V.35.  The voltages are different between the two for the control
signals.  Fortunately the data and clock signals are compatable, not
exactly the same but compatable.  By control signals I mean DSR, DTR,
RS, CS, CD ... but not clock.

One CSU I have dealt with in the past had an internal switch to convert
the CSU's interface between V.35 and RS449/RS530 voltages for the
control pins as well.  You then bought an adaptor cable from the CSU
vendor so that it was converted to the right kind of physical
interface.  So depending on the vendor there might be more than one way
to run V.35 over the DB25 interface.

It is possible to design a V.35 to RS530 adaptor cable.  You loop back
the control signals to fool both ends and pass clock and data.  I've done
it.

Walt

 
 
 

V.35/RS-232 ???

Post by MADMA » Fri, 12 Feb 1999 04:00:00


  The pinouts are available in the Hardware Installation and Maintenance manuals
but I must ask what are you trying to do.

  Dave


> Hello.

> Normally Cisco's serial (DB-60) is connected to modem V.35 interface
> with CAB-V35MT. Good. But if modem's interface card is V.35 with DB-25
> connector. What is pinning for it? I'm confused, because commonly
> DB-25 is used for RS-232, which use in asinch. communications. My situation:

> V.35 interface card (DB-25)-cable DB-25 male/V.35 female (like
> cisco)-CAB-V35MT

> I'm not sure in correct pinning of this "cable". Pls, ideas, links...

> brgd,

> __________________________________________________________
> Jan Vercinskij                          phone:  +370-2-730964
> Telia Lithuania                         fax:    +370-2-730959

>                                                 http://www.telia.lt
> __________________________________________________________

--
David Madland
CCIE# 2016
Sr. Network Engineer
U S WEST !nterprise Networking Services
612-664-3367

 
 
 

V.35/RS-232 ???

Post by Paul Schmid » Fri, 12 Feb 1999 04:00:00


I think a v.35 interface with a db 25 connector is a standard
530I interface.  I suspect the correct cable is the CAB-530MT.

This would be a DTE cable from the router perspective and
would have male pins. If your V.35 interface card has a female
connector (which seems likely) this is the only cable you will need.

If for some reason, your v.35 interface card has a male connector
you would need a cisco 530 cable with a female end. I am not sure
if we make one since I do not see it in the price list (dated Feb
1998). If we did, I suspect it would be called CAB-530FT (i.e.
female DTE). I suspect someone in the cisco TAC could tell you
for sure. Worst case, you could put a gender bender on the CAB-530MT.

Hope this helps...

Paul


> X-SMAP-Received-From: outside


> Subject: V.35/RS-232 ???
> Date: Thu, 11 Feb 1999 14:30:50 +0100
> MIME-Version: 1.0
> Content-Transfer-Encoding: 7bit
> X-Priority: 3 (Normal)
> X-MSMail-Priority: Normal
> X-Mailer: Microsoft Outlook 8.5, Build 4.71.2173.0
> Importance: Normal
> X-MimeOLE: Produced By Microsoft MimeOLE V4.72.2106.4

> Hello.

> Normally Cisco's serial (DB-60) is connected to modem V.35 interface
> with CAB-V35MT. Good. But if modem's interface card is V.35 with DB-25
> connector. What is pinning for it? I'm confused, because commonly
> DB-25 is used for RS-232, which use in asinch. communications. My situation:

> V.35 interface card (DB-25)-cable DB-25 male/V.35 female (like
> cisco)-CAB-V35MT

> I'm not sure in correct pinning of this "cable". Pls, ideas, links...

> brgd,

> __________________________________________________________
> Jan Vercinskij                             phone:  +370-2-730964
> Telia Lithuania                            fax:    +370-2-730959

>                                            http://www.telia.lt
> __________________________________________________________

 
 
 

V.35/RS-232 ???

Post by Clayton Duke » Fri, 12 Feb 1999 04:00:00


Allow me to take a guess here....

Are you trying to connect to a Kentrox CSU/DSU or a Memotek FRAD perchance?

If so, you need to buy a special adapter to plug into the male side of the
winchester socket of the CAB-V35MT
You can get this adapter from Kentrox (or Memotek, if that's what you are
connecting to).

Hope this helps you :-)

Regards,
Clayton Dukes
Network Engineer
904-390-1109


-----Original Message-----

Sent: Thursday, February 11, 1999 2:28 PM
To: Jan Vercinskij

Cc: Cisco Mailing List
Subject: Re: V.35/RS-232 ???

  The pinouts are available in the Hardware Installation and Maintenance
manuals
but I must ask what are you trying to do.

  Dave


> Hello.

> Normally Cisco's serial (DB-60) is connected to modem V.35 interface
> with CAB-V35MT. Good. But if modem's interface card is V.35 with DB-25
> connector. What is pinning for it? I'm confused, because commonly
> DB-25 is used for RS-232, which use in asinch. communications. My
situation:

> V.35 interface card (DB-25)-cable DB-25 male/V.35 female (like
> cisco)-CAB-V35MT

> I'm not sure in correct pinning of this "cable". Pls, ideas, links...

> brgd,

> __________________________________________________________
> Jan Vercinskij                          phone:  +370-2-730964
> Telia Lithuania                         fax:    +370-2-730959

>                                                 http://www.telia.lt
> __________________________________________________________

--
David Madland
CCIE# 2016
Sr. Network Engineer
U S WEST !nterprise Networking Services
612-664-3367


 
 
 

V.35/RS-232 ???

Post by Siva Valliappa » Fri, 12 Feb 1999 04:00:00


if your device is expecting V.35 DTE, do not put a 530 cable on it.
it is not going to work.  Cisco only provides V.35 cables with a
winchestor interface.  the 25-pinout that your device is expecting is
proprietary.  contact your vendor to get a DB-25 to Winchestor adaptor
and use a standard V.35 DTE cable.  nothing else will work.

.siva

> I think a v.35 interface with a db 25 connector is a standard
> 530I interface.  I suspect the correct cable is the CAB-530MT.

> This would be a DTE cable from the router perspective and
> would have male pins. If your V.35 interface card has a female
> connector (which seems likely) this is the only cable you will need.

> If for some reason, your v.35 interface card has a male connector
> you would need a cisco 530 cable with a female end. I am not sure
> if we make one since I do not see it in the price list (dated Feb
> 1998). If we did, I suspect it would be called CAB-530FT (i.e.
> female DTE). I suspect someone in the cisco TAC could tell you
> for sure. Worst case, you could put a gender bender on the CAB-530MT.

> Hope this helps...

> Paul


> > X-SMAP-Received-From: outside


> > Subject: V.35/RS-232 ???
> > Date: Thu, 11 Feb 1999 14:30:50 +0100
> > MIME-Version: 1.0
> > Content-Transfer-Encoding: 7bit
> > X-Priority: 3 (Normal)
> > X-MSMail-Priority: Normal
> > X-Mailer: Microsoft Outlook 8.5, Build 4.71.2173.0
> > Importance: Normal
> > X-MimeOLE: Produced By Microsoft MimeOLE V4.72.2106.4

> > Hello.

> > Normally Cisco's serial (DB-60) is connected to modem V.35 interface
> > with CAB-V35MT. Good. But if modem's interface card is V.35 with DB-25
> > connector. What is pinning for it? I'm confused, because commonly
> > DB-25 is used for RS-232, which use in asinch. communications. My situation:

> > V.35 interface card (DB-25)-cable DB-25 male/V.35 female (like
> > cisco)-CAB-V35MT

> > I'm not sure in correct pinning of this "cable". Pls, ideas, links...

> > brgd,

> > __________________________________________________________
> > Jan Vercinskij                                phone:  +370-2-730964
> > Telia Lithuania                               fax:    +370-2-730959

> >                                               http://www.telia.lt
> > __________________________________________________________

 
 
 

V.35/RS-232 ???

Post by Paul Schmid » Fri, 12 Feb 1999 04:00:00


I have used a EIA530I cable in the past to go to a v.35 interface
with a db25 connector.

What is the CAB-530FT cable for?

Paul

------------------------------------------------------------------------------
Paul Schmidt            Cisco Systems          Phone:  919 472-2510
Enterprise Networking   7025 Kit Creek Road    Fax:    919 472-2690

------------------------------------------------------------------------------


> if your device is expecting V.35 DTE, do not put a 530 cable on it.
> it is not going to work.  Cisco only provides V.35 cables with a
> winchestor interface.  the 25-pinout that your device is expecting is
> proprietary.  contact your vendor to get a DB-25 to Winchestor adaptor
> and use a standard V.35 DTE cable.  nothing else will work.

> .siva

> > I think a v.35 interface with a db 25 connector is a standard
> > 530I interface.  I suspect the correct cable is the CAB-530MT.

> > This would be a DTE cable from the router perspective and
> > would have male pins. If your V.35 interface card has a female
> > connector (which seems likely) this is the only cable you will need.

> > If for some reason, your v.35 interface card has a male connector
> > you would need a cisco 530 cable with a female end. I am not sure
> > if we make one since I do not see it in the price list (dated Feb
> > 1998). If we did, I suspect it would be called CAB-530FT (i.e.
> > female DTE). I suspect someone in the cisco TAC could tell you
> > for sure. Worst case, you could put a gender bender on the CAB-530MT.

> > Hope this helps...

> > Paul


> > > X-SMAP-Received-From: outside


> > > Subject: V.35/RS-232 ???
> > > Date: Thu, 11 Feb 1999 14:30:50 +0100
> > > MIME-Version: 1.0
> > > Content-Transfer-Encoding: 7bit
> > > X-Priority: 3 (Normal)
> > > X-MSMail-Priority: Normal
> > > X-Mailer: Microsoft Outlook 8.5, Build 4.71.2173.0
> > > Importance: Normal
> > > X-MimeOLE: Produced By Microsoft MimeOLE V4.72.2106.4

> > > Hello.

> > > Normally Cisco's serial (DB-60) is connected to modem V.35 interface
> > > with CAB-V35MT. Good. But if modem's interface card is V.35 with DB-25
> > > connector. What is pinning for it? I'm confused, because commonly
> > > DB-25 is used for RS-232, which use in asinch. communications. My situation:

> > > V.35 interface card (DB-25)-cable DB-25 male/V.35 female (like
> > > cisco)-CAB-V35MT

> > > I'm not sure in correct pinning of this "cable". Pls, ideas, links...

> > > brgd,

> > > __________________________________________________________
> > > Jan Vercinskij                           phone:  +370-2-730964
> > > Telia Lithuania                          fax:    +370-2-730959

> > >                                          http://www.telia.lt
> > > __________________________________________________________

 
 
 

V.35/RS-232 ???

Post by esko.. » Sat, 13 Feb 1999 04:00:00


Jan,

I am not aware of any "standard" for using a DB-25 (RS232) connector for
V.35.  The pin-out will be specific to the modem's manufacturer.

There is a standard for using RS-422 on a DB-25.  It is RS-530.

Your best bets are to contact the modem manufacturer, use the supplied
cable, or use an ohm-meter to determine the pin-out of the DB-25 to V.35
cable.

Good Luck,

..Eugene..


      02/11/99 08:30 AM



cc:    (bcc: Eugene Skopal)
Subject:  V.35/RS-232 ???

Hello.

Normally Cisco's serial (DB-60) is connected to modem V.35 interface
with CAB-V35MT. Good. But if modem's interface card is V.35 with DB-25
connector. What is pinning for it? I'm confused, because commonly
DB-25 is used for RS-232, which use in asinch. communications. My
situation:

V.35 interface card (DB-25)-cable DB-25 male/V.35 female (like
cisco)-CAB-V35MT

I'm not sure in correct pinning of this "cable". Pls, ideas, links...

 
 
 

V.35/RS-232 ???

Post by Siva Valliappa » Sat, 13 Feb 1999 04:00:00


we have no CAB-530FT cables,
we only have:

CAB-530MT=      MALE DTE RS-530

cheers
.siva

> I have used a EIA530I cable in the past to go to a v.35 interface
> with a db25 connector.

> What is the CAB-530FT cable for?

> Paul

> ------------------------------------------------------------------------------
> Paul Schmidt            Cisco Systems          Phone:  919 472-2510
> Enterprise Networking   7025 Kit Creek Road    Fax:    919 472-2690

> ------------------------------------------------------------------------------


> > if your device is expecting V.35 DTE, do not put a 530 cable on it.
> > it is not going to work.  Cisco only provides V.35 cables with a
> > winchestor interface.  the 25-pinout that your device is expecting is
> > proprietary.  contact your vendor to get a DB-25 to Winchestor adaptor
> > and use a standard V.35 DTE cable.  nothing else will work.

> > .siva

> > > I think a v.35 interface with a db 25 connector is a standard
> > > 530I interface.  I suspect the correct cable is the CAB-530MT.

> > > This would be a DTE cable from the router perspective and
> > > would have male pins. If your V.35 interface card has a female
> > > connector (which seems likely) this is the only cable you will need.

> > > If for some reason, your v.35 interface card has a male connector
> > > you would need a cisco 530 cable with a female end. I am not sure
> > > if we make one since I do not see it in the price list (dated Feb
> > > 1998). If we did, I suspect it would be called CAB-530FT (i.e.
> > > female DTE). I suspect someone in the cisco TAC could tell you
> > > for sure. Worst case, you could put a gender bender on the CAB-530MT.

> > > Hope this helps...

> > > Paul


> > > > X-SMAP-Received-From: outside


> > > > Subject: V.35/RS-232 ???
> > > > Date: Thu, 11 Feb 1999 14:30:50 +0100
> > > > MIME-Version: 1.0
> > > > Content-Transfer-Encoding: 7bit
> > > > X-Priority: 3 (Normal)
> > > > X-MSMail-Priority: Normal
> > > > X-Mailer: Microsoft Outlook 8.5, Build 4.71.2173.0
> > > > Importance: Normal
> > > > X-MimeOLE: Produced By Microsoft MimeOLE V4.72.2106.4

> > > > Hello.

> > > > Normally Cisco's serial (DB-60) is connected to modem V.35 interface
> > > > with CAB-V35MT. Good. But if modem's interface card is V.35 with DB-25
> > > > connector. What is pinning for it? I'm confused, because commonly
> > > > DB-25 is used for RS-232, which use in asinch. communications. My situation:

> > > > V.35 interface card (DB-25)-cable DB-25 male/V.35 female (like
> > > > cisco)-CAB-V35MT

> > > > I'm not sure in correct pinning of this "cable". Pls, ideas, links...

> > > > brgd,

> > > > __________________________________________________________
> > > > Jan Vercinskij                              phone:  +370-2-730964
> > > > Telia Lithuania                             fax:    +370-2-730959

> > > >                                             http://www.telia.lt
> > > > __________________________________________________________

 
 
 

V.35/RS-232 ???

Post by Antonio Vasconcelo » Sat, 13 Feb 1999 04:00:00



Quote:>You will need a straight cable
>Take the pin-outs for the DCE you have, I expect the pin-outs to
>indicate what signals the DCE expects at the interface from the DTE.
>Make a cable with DB25-Male <->Winch 34 pin  Female. Make a one to one
>mapping of the signals from the DB25 to the V.35 connectors and You have
>the cable...

It's not that easy, it may not work if the v.35 is longuer than a couple of
meters, remember that v.35 is a balanced interface using cables with
twisted pairs, a simple pin-to-pin db-25 to v.35 may be a bad idea.

--
Antnio Vasconcelos - Senior Network Management Support

CONVEX - Informtica e Sistemas de Comunica??es Portugal, Lda
T: +351-1-422-1040    F: +351-1-421-3787    W: http://www.convex.pt

 
 
 

V.35/RS-232 ???

Post by Antonio Vasconcelo » Sat, 13 Feb 1999 04:00:00



Quote:>Allow me to take a guess here....

>Are you trying to connect to a Kentrox CSU/DSU or a Memotek FRAD perchance?

>If so, you need to buy a special adapter to plug into the male side of the
>winchester socket of the CAB-V35MT
>You can get this adapter from Kentrox (or Memotek, if that's what you are
>connecting to).

Or it could be a Motorola Codex 6525 PAD.
About 2 years ago, the only way to get a link over 64K on the Codex was to
use the V.35 module on the processor card, as the backplane only have db25
connectors, a custom cable had to be made, with a db25 male at an end and a
v.35 female at the other.

I think I could ask for this pinout to a previous co-worker, but I'm
affraid that this pinout could have been proprietary.

--
Antnio Vasconcelos - Senior Network Management Support

CONVEX - Informtica e Sistemas de Comunica??es Portugal, Lda
T: +351-1-422-1040    F: +351-1-421-3787    W: http://www.convex.pt

 
 
 

V.35/RS-232 ???

Post by Paul Schmid » Sat, 13 Feb 1999 04:00:00


Sorry, my last email contained a typo... it should have said...

What is the CAB-530MT cable for?

As I said in my original email, I didn't know if we make a
CAB-530FT cable.

I recall using the CAB-530MT  several years ago to connect to
a v.35 interface with a db25 connector. I am not expert in the
electrical signals, but at the time someone who claimed to be told
me that the EIA530 is electrically equivalent to the v.35 for pratical
purposes. I don't know if this is correct or not, but I tried it and it
worked with no problems.

Paul

------------------------------------------------------------------------------
Paul Schmidt            Cisco Systems          Phone:  919 472-2510
Enterprise Networking   7025 Kit Creek Road    Fax:    919 472-2690

------------------------------------------------------------------------------


> X-SMAP-Received-From: outside

> Subject: Re: V.35/RS-232 ???

> Date: Thu, 11 Feb 1999 20:50:45 -0800 (PST)

> X-Mailer: ELM [version 2.4 PL25]
> MIME-Version: 1.0
> Content-Transfer-Encoding: 7bit

> we have no CAB-530FT cables,
> we only have:

> CAB-530MT=      MALE DTE RS-530

> cheers
> .siva

> > I have used a EIA530I cable in the past to go to a v.35 interface
> > with a db25 connector.

> > What is the CAB-530FT cable for?

> > Paul

> > ------------------------------------------------------------------------------
> > Paul Schmidt            Cisco Systems          Phone:  919 472-2510
> > Enterprise Networking   7025 Kit Creek Road    Fax:    919 472-2690

> > ------------------------------------------------------------------------------


> > > if your device is expecting V.35 DTE, do not put a 530 cable on it.
> > > it is not going to work.  Cisco only provides V.35 cables with a
> > > winchestor interface.  the 25-pinout that your device is expecting is
> > > proprietary.  contact your vendor to get a DB-25 to Winchestor adaptor
> > > and use a standard V.35 DTE cable.  nothing else will work.

> > > .siva

> > > > I think a v.35 interface with a db 25 connector is a standard
> > > > 530I interface.  I suspect the correct cable is the CAB-530MT.

> > > > This would be a DTE cable from the router perspective and
> > > > would have male pins. If your V.35 interface card has a female
> > > > connector (which seems likely) this is the only cable you will need.

> > > > If for some reason, your v.35 interface card has a male connector
> > > > you would need a cisco 530 cable with a female end. I am not sure
> > > > if we make one since I do not see it in the price list (dated Feb
> > > > 1998). If we did, I suspect it would be called CAB-530FT (i.e.
> > > > female DTE). I suspect someone in the cisco TAC could tell you
> > > > for sure. Worst case, you could put a gender bender on the CAB-530MT.

> > > > Hope this helps...

> > > > Paul


> > > > > X-SMAP-Received-From: outside


> > > > > Subject: V.35/RS-232 ???
> > > > > Date: Thu, 11 Feb 1999 14:30:50 +0100
> > > > > MIME-Version: 1.0
> > > > > Content-Transfer-Encoding: 7bit
> > > > > X-Priority: 3 (Normal)
> > > > > X-MSMail-Priority: Normal
> > > > > X-Mailer: Microsoft Outlook 8.5, Build 4.71.2173.0
> > > > > Importance: Normal
> > > > > X-MimeOLE: Produced By Microsoft MimeOLE V4.72.2106.4

> > > > > Hello.

> > > > > Normally Cisco's serial (DB-60) is connected to modem V.35 interface
> > > > > with CAB-V35MT. Good. But if modem's interface card is V.35 with DB-25
> > > > > connector. What is pinning for it? I'm confused, because commonly
> > > > > DB-25 is used for RS-232, which use in asinch. communications. My situation:

> > > > > V.35 interface card (DB-25)-cable DB-25 male/V.35 female (like
> > > > > cisco)-CAB-V35MT

> > > > > I'm not sure in correct pinning of this "cable". Pls, ideas, links...

> > > > > brgd,

> > > > > __________________________________________________________
> > > > > Jan Vercinskij                         phone:  +370-2-730964
> > > > > Telia Lithuania                                fax:    +370-2-730959

> > > > >                                                http://www.telia.lt
> > > > > __________________________________________________________

 
 
 

V.35/RS-232 ???

Post by Derick.Winkwo.. » Mon, 15 Feb 1999 04:00:00


All:

        My shop has done some pretty extensive testing with V.35 ->
RS-530/RS-449 conversion cables.
        As stated previously, the control signals will not work.  We tried
on a number of different equipment and they do not work properly.
        We were able to get the clock and datas to work.  HOWEVER.  We were
not able to get it to work on cables that exceeded 6-12 feet in length.  The
exact length limitation is dependent on how tolerant your equipment is.
        Black Box corporation makes a converter box that works really well.
It costs ... I think...  130 dollars.

Derick

> ----------

> Sent:      Friday, February 12, 1999 12:32 PM
> To:        Sanjay  Thamagundale
> Cc:        'Jan Vercinskij'; Cisco Mailing List
> Subject:   RE: V.35/RS-232 ???


> >You will need a straight cable
> >Take the pin-outs for the DCE you have, I expect the pin-outs to
> >indicate what signals the DCE expects at the interface from the DTE.
> >Make a cable with DB25-Male <->Winch 34 pin  Female. Make a one to one
> >mapping of the signals from the DB25 to the V.35 connectors and You have
> >the cable...

> It's not that easy, it may not work if the v.35 is longuer than a couple
> of
> meters, remember that v.35 is a balanced interface using cables with
> twisted pairs, a simple pin-to-pin db-25 to v.35 may be a bad idea.

 
 
 

1. trade NP-2T16S V.35 for RS-232?

I have the V.35 version of an NP-2T16S but I really just need a couple of
async RS-232 lines.  Before I start fiddling with level shifters I thought
I'd check whether anyone has the RS-232 (or half RS-232/half V.35) version
of the module and wants to trade...

                                Dan Lanciani

2. Umax 1200s firmware upgrade

3. REsume: V.35/RS-232 ???

4. Publishing a new web

5. cable question: V.35 or RS-232

6. List of PC File Extensions

7. Synchonous interface RS-232 or V.35

8. runnin DR-DOS in a VDM

9. V.35 <-> RS-232

10. RS-232 vs. V.35

11. PC V.35/RS-232 Sync. card

12. V.35 to RS-232 Conversions