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Article Index
Cooler Master PBX
Call Features
Advanced Features
Codecs and Protocols


  • G.711 (A-Law & µ-Law)
  • G.722
  • G.723.1 (pass through)
  • G.726
  • G.729 (through purchase of a commercial license)
  • GSM
  • iLBC


  • IAX™ (Inter-Asterisk Exchange)
  • H.323
  • SIP (Session Initiation Protocol)
  • MGCP (Media Gateway Control Protocol
  • SCCP (Cisco® Skinny®)
  • Traditional Telephony Interoperability
  • FXS
  • FXO
  • DTMF support
  • PRI Protocols
Your calls continue uninterrupted with full or part time fail-over service from Cool Telecom. This system allows you to enjoy the same type of redundancy your local land line companies can offer but without the high monthly bill.