Linksys

Linksys Hardware Support

ATA Devices
SPA-2002 (2 FXS)

SIP Gateway
SPA-3102 (1 FXS / 1 FXO) Setup Guide at VoIPSpeak.net -- Also if you join the voxilla forum, you can use their auto-config tool here
SPA-400 (4 FXS)

Telephones
SPA-921 (1 line / 1 ethernet port)
SPA-922 (1 line / 2 ethernet ports / PoE)
SPA-941 (4 line / 1 ethernet port)
SPA-942 (4 line / 2 ethernet ports / PoE)
SPA-962 (6 line / 2 ethernet ports / PoE)