[cisco-voip] 2851 and 12 T1s

[Jonathan Charles]

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> 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 <SCASPER at mandtbank.com>
> *To:* jason.wydra at berbee.com ; cisco-voip at puck.nether.net ;
> 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> 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>
> Sent by: cisco-voip-bounces at puck.nether.net
> 11/30/2006 01:22 PM
>
> To
> <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
> www.berbee.com
>
>
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