I have a customer with a network that was using a Point to point T1 with a
channel bank on each end to initiate dial calls for AS-400 terminals to a
main office along with standard voice calls. Everything was working fine.
They were only using 5 of the channels of the T1 for these calls, so they
wanted to use the rest of it to provide data connections for their Ethernet
Network. The AS-400 is not on the Ethernet. So we introduced a 2610 Router
at each end, with VWIC CSU/DSUs that can do Drop and Insert on the T1, we
connected the T1 to the router, then the router out to the Channel bank.
The VWIC is configured to use the first 12 channels for voice and the last
12 channels for data. The data side works flawlessly and a call can be
initiated from channel bank to channel bank without a problem. Voice calls
work fine, so the VWIC is configured properly. The problem comes in with
the AS400 modems attempting to dial out, we can see them attempt the
connection, but then the data rate is walked down from 21,600 to 300 then
disconnects without establishing a connection.
Any ideas?
Tom McNamara
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