Our MPLS provider needs our routers to be setup with modems so that they can dial in and make config changes when necessary. I have connected the modem to the router (Cisco 2600) via the aux port. When I dial the # for the modem, it rings, but never answers. I'm guessing there's something in the router config that I need to setup, but I have no idea what it is. Any ideas?
The laziest way is almost certainly just to go:
The real answer is set &S0=1 in your modemcap (well probably) Actually you probably want to look at the whole list of vendor init strings http://www.cisco.com/en/US/tech/tk801/tk36/technologies_tech_note09186a008009428b.shtml#specinitialcomm (that page also has some info on creating a chatscript and altering modemcaps)
A couple of things to verify:
Additional information: Configuring a Modem on the AUX Port for EXEC Dialin Connectivity