I have never hung an isdn modem off the back of a router. I have used a BRI
before...so my first suggestion is to do that...tyou also have to make sure
your serial port is the same on the router and the TA. I dont know if the
2501's serial port is sync/async or not...
John Neiberger wrote:
> I've been handed a 3COM ISDN terminal adapter and have been told that we are
> planning to use ISDN as dial backup for a T-1 connecting to a 2501. One
> serial port and the ethernet port are being used. The aux port won't
> provide the needed bandwidth. So that leaves me with the second serial
> port.
>
> Is it possible to use a serial port on a 2501 in conjunction with a TA to
> for ISDN DDR? I've been searching cisco's site and haven't found any
> mention of how to accomplish this. My suggestion at this point is to buy a
> 2520 and use the BRI interface instead.
>
> Any suggestions on how to make this work?
>
> Thanks, as always!
>
> John Neiberger
>
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