General Knoppix support for those who've read the FAQ at the Wiki
Grandstream GXP1625 Small-Medium Business HD IP Phone POE VoIP LCD Display
$27.07
Cisco CP-8821-K9 Wireless IP VoIP Phone WITH BATTERY
$99.99
Cisco CP-8811 VoIP Phone 5-Line 5" LCD Display (Gray)
$55.50
Grandstream GS-HT802 2 Port Analog Telephone Adapter VoIP Phone & Device, Black
$32.00
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
Cisco/Linksys SPA2102 VoIP Phone Adapter Router 2FXS (Unlocked)
$16.99
Grandstream GS-HT802 2 Port Analog Telephone Adapter VoIP Phone Device
$17.50
Cisco CP-7911G V08 SCCP VoIP IP Telephone Phone PoE 7911G New Open Box
$16.99
EPYGI TECHNOLOGIES EPY-QX50 QX50 IP PBX VOIP COMMUNICATIONS APPLIANCE
$400.00