[cisco-voip] Question about T1 clocking

[Bill Talley]

Doesn't the VWIC2 allow for different clock sources for each port, that is,
independent clocking for each port?




On Wed, Feb 4, 2009 at 1:18 PM, Ed Leatherman <ealeatherman at gmail.com>wrote:

> My main concern is since both these are voice connections and they will be
> faxing over both links.. clock slips seem to cause trouble in that regard.
> Would adding the second VWIC eliminate the slip problem?
>
> On Wed, Feb 4, 2009 at 9:52 AM, Estes, Timothy <TimothyEstes at spherion.com>wrote:
>
>>  I have this running on about 90 28XX routers in the field. Sprint MPLS
>> circuits on the data side and Verizon or AT&T PRIs. You have to set network
>> clock select to the PRI for it to come up, therefore the data circuit slips.
>> Out of the 90 sites, only 2 have required new VWICs because of errors. The
>> rest tolerate the slips. I see as low as 15 and as many as 90 slip seconds
>> on the data circuits. 40 or 50 seems to be the limit for me, your mileage
>> may vary.
>>
>>
>>
>>
>>
>>
>>
>> Timothy Estes
>>
>> Data Network Operations Engineer
>>
>> ACS / Spherion
>>
>> Ft. Lauderdale FL
>>
>
>
>
>  --
> Ed Leatherman
> Assistant Director, Voice Services
> West Virginia University
> Telecommunications and Network Operations
>
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>
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