From: Sean Caron <scaron at umich.edu> Agreed...I've done this with Asterisk, and it works pretty well. Couple of things: 1) Make sure you get an IOS version that has the features you need (VoIP). Even the mc3810 has versions that don't do SIP, among other deficiencies. While there are numerous ways to "obtain" IOS, it's not free. 2) If you go mc3810, try and get a V3 model. Latest IOS for it is 12.3.3, but that's marked LD (limited deployment), so it might be better to shoot for 12.2.26c, which is the latest GD (general deployment) 12.2 chain. 12.3 might be fine, but I've never used it. 3) I think the latest IOS for c2600/c3600 (non-XM models) is 12.4.25. Any late 12.2, 12.3 or 12.4 release should work OK. 4) Cisco 1700s are also an option, as are a bunch of other models that you can stick an analog NM in. KJ