Cisco Systems Cisco 3825 Dial-in router with Digital modem card
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Subject Author Date
Cisco 3825 Dial-in router with Digital modem card MattG 07-17-07
Posted by MattG on July 17, 2007, 9:35 am
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Hi everyone,

Just wanted to post some notes around a configuration that I had
trouble getting working, and couldn't find any information on the net
or Cisco.com regarding the issue.

What we were doing is configuring a Cisco 3825 with a PVDM2-24DM (24
Port Digital Modem Module) and a NM-1CE1T1-PRI (1-Port Channelized E1/
T1/ISDN-PRI Network Module) for dial-in access to a network. This was
connected to a full PRI for dial-tone to the PSTN. I realize this is
old-school, but its what the business needed.

The problem we were facing is the router would see the calls come in
across the PRI, and a PRI channel would be established, however the
modem card would never answer and begin the call initialization.
After several hours of searching and two calls to Cisco TAC, the below
commands were given to me to try, and this resolved my problem.
(Please change the configuration with respect to which port your WIC
is in)

Network-clock-participate slot 1
Network-clock-select 1 t1 1/0

I found several other posts on the net regarding this same problem,
and no one had an answer. Hopefully this will help everyone in the
future who may come across the similar problem.

Best Regards,

Matt.


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