General Knoppix support for those who've read the FAQ at the Wiki
Cisco 8841 CP-8841-K9 VoIP Business IP Phone (Charcoal)
$46.00
Grandstream GS-HT802 2 Port Analog Telephone Adapter VoIP Phone & Device, Black
$32.00
Cisco CP-8821-K9 Wireless IP VoIP Phone WITH BATTERY
$99.99
Yealink SIP-T54W 16-Line Color Display Business VoIP Phone /w Built-in Bluetooth
$59.99
Cisco CP-7945G VOIP Phone With Stand & Handset Business IP Phone 7945
$3.00
Lightly Used Cisco 8811 Series VoIP phone Factory Reset great condition
$19.95
1 NEW - Cisco CP-7942G UC VoIP IP Programmable Office Phone
$20.00
Cisco/Linksys SPA2102 VoIP Phone Adapter Router 2FXS (Unlocked)
$16.99
Yealink SIP-T41P PoE Ultra Elegant VoIP Phone
$29.95
Cisco CP-7911G V08 SCCP VoIP IP Telephone Phone PoE 7911G New Open Box
$16.99