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
VoIP IP Phone SIP WAN FV6020 Fanvil Gigabit Office Support IAX IAX2
$35.56
REF A-STOCK - Polycom 2200-48450-025 VVX 411 IP VOIP POE Gigabit Telephone
$38.68
LOT OF 4 Grandstream GXP2135 8 Lines Bluetooth Enterprise VoIP Phone URSB-17w
$79.99
Cisco CP-7945G VOIP Phone With Stand & Handset Business IP Phone 7945
$3.00
$20.49
New Cisco 7945G IP VoIP Gigabit GIGE Telephone Phone CP-7945G -
$24.95
Cisco CP-8861-K9 5-Line VoIP Business Phone w/ Stand & Handset
$24.98
Grandstream HT801 Single-Port Analog Telephone Adapter
$34.00
Yealink SIP-T41P PoE Ultra Elegant VoIP Phone
$29.95