General Knoppix support for those who've read the FAQ at the Wiki
Grandstream GS-HT802 2 Port Analog Telephone Adapter VoIP Phone & Device, Black
$32.00
NEW Yealink SIP-T56A Smart 16 Line VoIP Smart Business Phone Teams Edition
$79.99
Grandstream GXP2130 Enterprise VoIP IP Phone Color Display- Office Phone
$35.99
Grandstream GS-HT802 2 Port Analog Telephone Adapter VoIP Phone & Device, Black
$29.99
Grandstream GS-GXP2160 Multiline Bluetooth VoIP Telephone - Black
$25.99
Cisco CP-7945G VOIP Phone With Stand & Handset Business IP Phone 7945
$3.00
IP SIP VoIP Phone Vtech ErisTerminal SIP DECT Cordless 4-Line Handset Lot of 3
$19.98
Polycom VVX 411 12-Line VOIP Phone - 2200-48450-025
$6.00
Poly CCX 600 7" Color Touchscreen POE VOIP SIP IP Desktop Phone 2201-49780-001
$149.99
Cisco CP-8851-K9 8851 VoIP IP POE Phone Free Express Shipping 1-Year Warranty.
$40.33