List of compatible SIP PBX Interop's & configuration guides.

3CX ThinkTel's Interop Doc
Asterisk
- Asterisk ThinkTel's Interop Doc for all versions
- Digium G100/G200 ThinkTel's Interop Doc
AudioCodes Mediant E-SBC with Microsoft Lync ThinkTel's Interop Doc
Avaya
- Avaya Aura Configuration Guides
- Avaya IP Office Configuration Guides
Barracuda Cudatel Phone System 270 ThinkTel's Interop Doc
Bogen Configuration Guides
- Call Manager Configuration Guides
  UC540 Configuration Guides
- C881 Voice 15.3.(3)M5 ThinkTel's Interop DocCisco
Ericson-LG (UCP AND EMG80-P2 system.)) NINE-ONE-ONE's Interop Doc
Fonality Trixbox Pro ThinkTel's Interop Doc
Freeswitch Configuration Guides
Grandstream ThinkTel's Interop Doc
- Grandstream ATA
- Grandstream PBX
MITEL
- MITEL MCD ThinkTel's Interop Doc
- MITEL Onsite (ShoreTel)
- MITEL PBX
Panasonic ThinkTel's Interop Doc
Patton4991 ThinkTel's Interop Doc
Planet IPX Configuration Guides
Polycom Configuration Guides
Ribbon SBC ThinkTel's Interop Doc
Epygi Quadro-IP-PBSx ThinkTel's Interop Doc
Sangoma SBC ThinkTel's Interop Doc
Sutus ThinkTel's Interop Doc
Talkswitch Users Guide and ThinkTel's Interop Doc
Toshiba Strata CIX ThinkTel's Interop Doc
Yealink T55A ThinkTel's Interop Doc
Zultys ITSP ThinkTel's Interop / Quick Start Doc