Originally posted by: cmetz
First of all, you need to know what signalling (CAP, DMT, etc.) your LEC (CLEC/ILEC) is using, or it electrically won't talk.
Why a Cisco? If you just want the name, get a 678. It's discontinued and dead-end, but it's available easily and cheaply used and even new because Qwest uses them as CPE. From what I've heard, they're supposed to work pretty well. If you want to run Real IOS, then you need to be a lot more picky - the 678 and many low-end Cisco boxes run other firmware that's had an IOS-like user interface grafted in. The 1400 seems to be the lowest-end platform that runs Real IOS. Even then, though, you need to get up to the 2600/3600 platforms before you can get a reasonably complete IOS feature set.