General Knoppix support for those who've read the FAQ at the Wiki
AUDIO CODES MP-114 VOIP Gateway Open Box
$24.99
Grandstream GS-HT802 2 Port Analog Telephone Adapter VoIP Phone & Device, Black
$32.00
$199.99
VoIP IP Phone SIP WAN FV6020 Fanvil Gigabit Office Support IAX IAX2
$35.56
Cisco CP-7945G VOIP Phone With Stand & Handset Business IP Phone 7945
$3.00
Grandstream DP720 10 SIP Accounts Full HD Audio Dect Cordless VoIP Telephone
$24.44
New Cisco 7945G IP VoIP Gigabit GIGE Telephone Phone CP-7945G -
$24.95
************* WORKING Obihai OBi202 2-Line VoIP Phone Adapter & Google Voice/Fax
$45.99
REF A-STOCK - Polycom 2200-48450-025 VVX 411 IP VOIP POE Gigabit Telephone
$38.68
Yealink SIP-T41P PoE Ultra Elegant VoIP Phone
$29.95