OVA opens your calendar and speaks your
appointments for today over the phone.
The preceding were just a couple of examples of Exchange 2007 UM features and how
you can use them in the real world. Next, we??™ll discuss in a little more in detail the requirements
to implement Exchange 2007 UM.
What Does It Work With?
Exchange 2007 UM has a few requirements to work properly. Exchange UM, in most cases,
will require a VoIP gateway installed. These can range from around a thousand dollars to
several thousand dollars, depending on the capacity required. The VoIP gateway is needed
to route traffi c between a traditional PBX and Exchange 2007. By implementing a VoIP
gateway, you can integrate most phone systems with Exchange 2007. Depending on your
PBX vendor, you may not need to implement a gateway device. Some IP based PBXes
provide integration with Exchange 2007 out of the box or with an add-on to their software.
The main requirement is that they can route IP-based calls using the SIP protocol. These
types of PBXes are then confi gured to route SIP-based calls bound for OCS users to the
OCS mediation server.
NOTE
Exchange Server 2007 supports the standard SIP over TCP; however, some
IP-PBXes use SIP over UDP. These PBXes will still require a gateway or a SIP
router to convert SIP/UDP to SIP/TCP.
Exchange 2007 Architecture
Implementing UM requires a properly architected and implemented Exchange 2007
infrastructure. In most cases, you will need to be sure that not only Exchange but also Exchange
connectivity to your PBX is highly available.
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