I have a 3661 router with 16 port analog modem (NM-16AM) install for dialup users. This the the version of the modems:
show modem version
Slot 3:MCOM Analog Integrated Modem Firmware Version 1.2.8
Source: IOS
Boot firmware: 1.1.5
MIMIC firmware: 1.3.3
Modem firmware: 2.3.17
DSP firmware: 0.0.2
Can somebody advice me on the compatible external modems that I will need to install on dialup users PC. Prefer external modems. I need to advice my dialup users on the modem they should buy that is compatible to my routers modem and will not create problems