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Modemcap entries and retrains on 2620.

I'm looking for the correct Modemcap entry for NM-8AM modems on

2620 to limit the connect speed to 14.4kbps. Any way of changing some of the S registers or putting in a different init string?

On that point a further modemcap question: Is there a setting to increase

the number of accepted retrains/negotiations?

At the moment the number seems to be fixed at 3, is there a way to increase it to a higher number like 10? Due to the bad lines in the area many customers modems are kicked off, leading to a 'no-connect'.

By increasing the number of retrains and limiting the speed we are hoping to get better results.



Cisco Employee

Re: Modemcap entries and retrains on 2620.

Here is the docs which has a AT commands for analog modems.

Here is the url for how to apply modemcap

Now to limit the connection to 14.4 kbps and lower, you need to use


above setting will allow the speed 14400 (V.32bis) and lower..

For Retrain limit you need to use %E1 and :T79 which can have max value 3 only..