Support of the main PBX on the market

PBXProtocol
Aastra/Ericsson MX-ONE/MD-EvolutionCSTA phase I
Aastra Nexspan/5000CSTA phase II
Aastra OpenComCSTA 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

AsteriskAsterisk Manager API
Enhanced support for Aastra, Snom SIP phones...
Avaya AESJTAPI
Cisco Call ManagerJTAPI
Cisco Communications Manager ExpressSIP/CSTA ECMA TR/87
Siemens Hipath

CSTA phase II or III

Tadiran CoralCSTA phase I
Unify Openscape OfficeCSTA phase III
Unify Openscape BusinessCSTA phase III