Support of the main PBX on the market

PBX Protocol
Aastra/Ericsson MX-ONE/MD-Evolution CSTA phase I
Aastra Nexspan/5000 CSTA phase II
Aastra OpenCom CSTA phase III
Alcatel-Lucent Omni PCX Entreprise

CSTA phase II / SIP

TelServer v2.6 is AAPP certified from OXE R11

Alcatel-Lucent Omni PCX Office

CSTA phase I

TelServer v2.6 is AAPP certified from OXO R10

Asterisk Asterisk Manager API
Enhanced support for Aastra, Snom SIP phones...
Cisco Call Manager JTAPI
Cisco Communications Manager Express SIP/CSTA ECMA TR/87
Siemens Hipath

CSTA phase II or III

Tadiran Coral CSTA phase I
Unify Openscape Office CSTA phase III
Unify Openscape Business CSTA phase III