Have you tried security oriented distro Operator.iso by ussysadmin.org? It is based on knoppix and debian. Also it is one of the best network testing and pen testers tool?
Grandstream GS-HT802 2 Port Analog Telephone Adapter VoIP Phone & Device, Black
$32.00
Polycom VVX 411 IP VOIP POE Gigabit Telephone [L/N] BUSINESS OFFICE RECEPTION
$24.00
Cisco CP-7965G IP VOIP POE Gigabit Telephone [L/N] BUSINESS OFFICE RECEPTION
$20.00
Polycom VVX 250 Business IP Phone with 2.8 in. Color Display & Ethernet, Black
$32.89
Cisco CP-7945G VOIP Phone With Stand & Handset Business IP Phone 7945
$3.00
**NEW** Poly CCX 700 OpenSIP - VoIP Phone (2200-49750-025)
$250.00
Cisco/Linksys SPA2102 VoIP Phone Adapter Router 2FXS (Unlocked)
$16.99
Cisco CP-8845-K9 5 Line IP Video Phone - Charcoal
$25.00
Grandstream GXP1620 Small to Medium Business HD IP Phone VoIP Phone and Device
$21.68
Lot of 4 Cisco CP-8861 Full Color PoE VOIP Desk Phone CP-8861-K9 V01
$37.99