I went looking for a modem to handle a software based answering machine.
Came up with this one:
Multi-Tech MultiModemZDX MT5656ZDX-V56K Technology V.90, V.92 Cables Included 1 x phone cable Compliant Standards FCC Class B certified, CE Connections 1 x serial - RS-232 - 25 pin D-Sub (DB-25) Connectivity Technology Wired Data Compression Protocol MNP-5, ITU V.42bis, ITU V.44 Depth 5.7 in Device Type Fax / modem Enclosure Type External Error Correction Protocol ITU V.42 Fax Compatibility G3 Features Auto answer Height 1 in Humidity Range Operating 25 - 85% Interface Type Serial RS-232 Interfaces 1 x modem - phone line - RJ-11 - 2 ¦ 1 x microphone - input - 1 ¦ 1 x speakers - output - 1 Localization Canada, United States Max Fax Transfer Rate 14.4 Kbps Max Operating Temperature 122 °F Max Transfer Rate 56 Kbps Min Operating Temperature 32 °F OS Required Microsoft Windows 95, SCO OpenServer, Linux, Microsoft Windows NT, Microsoft Windows XP, Microsoft Windows 98/ME/2000 Protocols & Specifications ITU V.34, ITU V.90, ITU V.17, ITU V.92 , Hayes AT command set Service & Support 10 years warranty Service & Support Details Limited warranty - parts and labor - 10 years - carry-in Software Included Drivers Utilities Voice Communication Support Voice mail, speakerphone Weight 0.4 lbs Width 4.3 in Weight of Product 1.5 lbs. Manufacturer Part Number MT5656ZDX-V Web Product Description V.92 VOICE/DATA/FAX MODEM Manual: http://www.multitech.com/DOCUMENTS/Collateral/manuals/S000248G.pdf
I'll post more up once it arrives... and how well it works, etc.
Update: Excellent modem. Drivers were a bit annoying to install, but the product is rock solid. Excellent fax/data modem with basic voice functionality. If you're serious about voice, get a USB or dedicated PCI voice card. This was perfect for my home answering machine though! =)