Integration of heterogenous VoIP servers such as IP-PBX and presence servers

摘要

The application relates to the integration of heterogeneous VoIP servers such as IP-PBX servers and presence servers.
The integration relates in particular to remote call control whereby a soft-phone such as a Microsoft Office Communicator client, MOC client, which is served by a SIP server such a Microsoft Office Communicator server, MOC server, remotely controls an IP phone which is served by an IP PBX. The IP PBX may not support a CSTA interface but rather another telephony API such as Java telephony API actions. Therefore a CSTA gateway (120) which is integrated in an adaptation proxy (100) translates between CSTA events and JTAPI actions.
The integration furthermore relates to the interaction of heterogeneous VoIP domains which utilize dissimilar SIP message formats. Therefore a SIP adapter (160) which is integrated in said adaptation proxy (100) translates between the different SIP message formats.
The integration furthermore relates to the presence information integration between different client devices served by different SIP servers, in particular when the different client devices are associated to the same user. Therefore a presence integrator (140) which is integrated in said adaptation proxy (100) maps between different state types.