[cisco-voip] Question about T1 clocking

[Ed Leatherman]

Hi folks,

Been thru a number of threads and also "configuring digital voice ports" out
on cisco.com.. I think i understand what I need to know from it but for one
question.

I've got a regional campus that wants to connect a long distance (sprint I
think) T1 to an existing IOS gateway that has a VWIC2-2MFT-T1 with a free
port. The other port is a PRI to their local service provider. i've told
them that I believe this will cause clocking issues since they are from
different carriers and would not recommend it.

My other thought was to add another VWIC to this router so that the long
distance T1 has a seperate PLL, but then I started reading about the
network-clock-select - even if I did this, the clocks running the DSP's
would still be synched to one particular line clock and i'd still likely get
slips, is this this true? Is my only option to get a seperate router for
this application if I want to avoid having clocking problems?

Thanks in advance!

-- 
Ed Leatherman
Assistant Director, Voice Services
West Virginia University
Telecommunications and Network Operations
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