Datasheet

Office Communications Server 2007 R2 Product Overview – v 2009.1.30 65
Coexistence scenario
Coexistence is when an incoming call is forked between the PBX phone and the user's logged-in Office
Communicator 2007 R2 endpoints. The PBX phone and Office Communicator 2007 R2 "coexist" on the
user's desktop (see Figure 73).
Figure 73
To keep the PBX features and enjoy the great
streamlined communication capabilities of
Office Communications Server 2007 R2, add
Office Communications Server 2007 R2
software-powered VoIP to some or all users.
Then configure call routing on the qualified
IP-PBX between the user's legacy phone and
Office Communicator 2007 R2.
Standalone scenario
In the standalone scenario, various users within an organization replace their legacy phones with either
Office Communicator 2007 R2, or an Office Communications Server 2007 R2 Phone Edition Device (see
Figure 74).
Figure 74
This way, users who are configured to use
Office Communications Server 2007 R2 will
make and receive calls with Office
Communicator 2007 R2, and users
configured to use the PBX will make and
receive calls using the PBX. Each group
continues to have a smooth calling
experience, including extension-based dialing
capability. This scenario works especially well
for mobile employees.
Implementation
Both scenarios should be implemented using products qualified under the Unified Communications
Open Interoperability Program (UCOIP). For details, see the Open Interoperability Program Web site at
http://technet.microsoft.com/UCOIP.