SIP Trunking Drilldown: Supported Scenarios
Microsoft Office Communications Server 2007 and Microsoft Office Communications Server 2007 R2 will reach end of support on January 9, 2018. To stay supported, you will need to upgrade. For more information, see Resources to help you upgrade your Office 2007 servers and clients.
Supported scenarios include the following:
An enterprise Office Communications Server user is able to place a local or long distance outbound call to the public switched telephone network (PSTN) by using a service provider Session Initiation Protocol (SIP) trunk.
An enterprise Office Communications Server user is able to receive an inbound PSTN call to his/her Direct Inward Dialing (DID) number by using a service provider SIP trunk. If the service provider supports number portability, you can keep your pre-existing DID.
The Calling Party Number (that is, used to show caller ID) is supplied (if allowed) for inbound and outbound calls.
An active call can be placed on hold and off hold.
Any other scenario is outside the scope for the Office Communications Server 2007 R2 release. Some examples include the following:
E.911 support for outbound calls.
Invoking any service provider call conferencing functionality over the SIP trunk. (This is separate from the conferencing functionality provided by Office Communications Server.)
Invoking any service provider call forwarding/redirect functionality over the SIP trunk. (This is separate from the call forwarding/redirect functionality provided by Office Communications Server.)