[cisco-voip] 2851 and 12 T1s

[Pickett, McLean (OCTO)]

The VWIC2's support different clocking sources for data T1's, but not voice
T1's. Seems like the problem would be more related to PRI's on the same
router from different CO switches. Has anyone seen this in practice?

 

McLean

 

  _____  

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Jonathan Charles
Sent: Friday, December 01, 2006 9:55 AM
To: Lelio Fulgenzi
Cc: cisco-voip at puck.nether.net; STEVEN CASPER
Subject: Re: [cisco-voip] 2851 and 12 T1s

 

The only time you will get a clocking source problem is if you have multiple
T1s connecting to a router from different destination switches.

For example, you have a frame-relay T1 and a PRI... 

You have to identify to the router which WIC is going to be the master
clock. In which case you will see slips on the other T1. 

I do not believe there is any work-around. It is possible (though unlikely)
that there are some Cisco routers that can have multiple clock sources...



Jonathan

On 12/1/06, Lelio Fulgenzi <lelio at uoguelph.ca <mailto:lelio at uoguelph.ca> >
wrote:

Do the 3800s have this problem? 

 

----------------------------------------------------------------------------
----
Lelio Fulgenzi, B.A.
Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
"I can eat fifty eggs." "Nobody can eat fifty eggs."

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

From: STEVEN CASPER <mailto:SCASPER at mandtbank.com>  

To: jason.wydra at berbee.com <mailto:jason.wydra at berbee.com>  ;
cisco-voip at puck.nether.net <mailto:cisco-voip at puck.nether.net>  ;
cmstaffin at ra.rockwell.com <mailto:cmstaffin at ra.rockwell.com>  

Sent: Friday, December 01, 2006 7:18 AM

Subject: Re: [cisco-voip] 2851 and 12 T1s

 

What do you do if you have multiple potential clocking sources? It is
likely at a site that you can have connections to Local and Long
Distance service providers as well as to a PBX. 

Steve

>>> "Craig M Staffin" <cmstaffin at ra.rockwell.com
<mailto:cmstaffin at ra.rockwell.com> > 11/30/06 2:43 PM >>>
Biggest problem is going to be that the 2851 can only have one clocking

source.  So if all 12 terminate to the same CO switch you are fine 
otherwise you will have timeing issues.

Craig




"Wydra, Jason" <jason.wydra at berbee.com <mailto:jason.wydra at berbee.com> > 
Sent by: cisco-voip-bounces at puck.nether.net
<mailto:cisco-voip-bounces at puck.nether.net>  
11/30/2006 01:22 PM

To
<cisco-voip at puck.nether.net <mailto:cisco-voip at puck.nether.net> >
cc

Subject
[cisco-voip] 2851 and 12 T1s






Any issue with terminating 12 T1s into a 2851? I have a mixture of PRI
and 
T1 CAS. 6 2MFT-T1 cards. Does this router have the horsepower?
 
Jason Wydra
Berbee
Cisco Voice Engineer
8725 West Higgins Road, Suite 700
Chicago, Il. 60631
IP phone 773.867.6084
Cell 630-209-9792
Jason.Wydra at berbee.com <mailto:Jason.Wydra at berbee.com>  
www.berbee.com <http://www.berbee.com>  
 

 _______________________________________________
cisco-voip mailing list
cisco-voip at puck.nether.net <mailto:cisco-voip at puck.nether.net>  
https://puck.nether.net/mailman/listinfo/cisco-voip
<https://puck.nether.net/mailman/listinfo/cisco-voip>  


_______________________________________________
cisco-voip mailing list
cisco-voip at puck.nether.net <mailto:cisco-voip at puck.nether.net> 
https://puck.nether.net/mailman/listinfo/cisco-voip
<https://puck.nether.net/mailman/listinfo/cisco-voip> 


_______________________________________________
cisco-voip mailing list
cisco-voip at puck.nether.net <mailto:cisco-voip at puck.nether.net> 
https://puck.nether.net/mailman/listinfo/cisco-voip
<https://puck.nether.net/mailman/listinfo/cisco-voip> 



 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://puck.nether.net/pipermail/cisco-voip/attachments/20061201/8dfb8d7d/attachment-0001.html