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SIP Trunking Drilldown: Supported Scenarios

Communications Server 2007 R2

Topic Last Modified: 2009-07-14

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.)
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