Using Siemens OSV

SIP Server integrated with Siemens OpenScape Voice version 5 can be configured in Business Continuity mode. You must configure the option dr-forward=no-agent on the Application or DN (Voice over IP Service DN with service type=softswitch) when you configure SIP Server.

See the SIP Server Integration Reference for information and instructions about configuring the Siemens OpenScape Voice PBX.