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
$199.99
VoIP IP Phone SIP WAN FV6020 Fanvil Gigabit Office Support IAX IAX2
$35.56
Lot of 5 Panasonic KX-UT248 Executive VoIP SIP HD Voice Phone
$100.00
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
Cisco CP-8841 VoIP Phone - Black
$20.00
Grandstream GS-HT802 2 Port Analog Telephone Adapter VoIP Phone & Device, Black
$25.46
LOT OF 4 Grandstream GXP2135 8 Lines Bluetooth Enterprise VoIP Phone URSB-17w
$79.99
REF A-STOCK - Polycom 2200-48450-025 VVX 411 IP VOIP POE Gigabit Telephone
$38.68