Applies to: Exchange Server 2007 SP3, Exchange Server 2007 SP2, Exchange Server 2007 SP1, Exchange Server 2007
Topic Last Modified: 2008-03-20

When you configure your telephony and data networks for Microsoft Exchange Server 2007 Unified Messaging, you must correctly configure the IP gateways so that they communicate with the computers that are running Exchange 2007 that have the Unified Messaging server role installed. You must also correctly configure the IP gateways to communicate with Private Branch eXchanges (PBXs) in your organization. This topic gives you the information and links that are required to configure an IP gateway to communicate with a PBX.

Exchange 2007 Unified Messaging supports only Session Initiation Protocol (SIP) over Transmission Control Protocol (TCP).

Configuring an IP gateway

When you configure an IP gateway, you must consider whether the IP gateway device is analog, digital, or analog and digital. If the IP gateway interface that connects to a PBX is analog, you must correctly configure the appropriate settings to enable the IP gateway to communicate with a PBX. If the IP gateway interface that connects to a PBX is digital, there may be no additional configuration that is required to enable the digital interface to communicate with a PBX.

The following is a list of suggested resources that contain information that can help you correctly configure your IP gateways:

  • IP gateway, IP PBX, and PBX documentation. The Exchange TechCenter contains configuration files and setup information that you can use when you configure IP gateways, IP PBXs, and PBXs. For more information, see Telephony Advisor for Exchange Server 2007.

  • Configuring an AudioCodes-based IP gateway. You can obtain the latest support and configuration information at the Microsoft UM Specialist Resource Page to help you configure AudioCodes-based IP gateways for use with Exchange Server 2007 Unified Messaging.

  • To configure a Dialogic-based IP gateway. You can obtain the latest support and configuration information for Dialogic-based IP gateways at the Dialogic Technical Documentation Web site.

    The third-party Web site information in this topic is provided to help you find the technical information you need. The URLs are subject to change without notice.

We also recommend that all customers who plan to deploy Exchange 2007 Unified Messaging obtain the assistance of a Unified Messaging specialist. A Unified Messaging specialist will help make sure that there is a smooth transition to Exchange 2007 Unified Messaging from a legacy voice mail system. Performing a new deployment or upgrading a legacy voice mail system requires significant knowledge about PBXs and Exchange 2007 Unified Messaging. For more information about how to contact a Unified Messaging specialist, see the Microsoft Exchange Server 2007 Unified Messaging (UM) Specialists Web site.

When performing administrative tasks on the IP gateway by using a Web browser, the HTTP requests that are sent over the network when you are configuring an IP gateway device are not encrypted. To increase the level of security for the IP gateways on your network, use Internet Protocol security (IPsec) or Secure Sockets Layer (SSL) to help protect the administrative credentials and data that is transmitted over the network. We also recommend that you use a strong authentication mechanism and complex administrative passwords to protect the administrative credentials for the device.

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