Microsoft KB Archive/315671

= HOW TO: Configure DNS Q931 Records to Support Email Address Calling with H.323 Gatekeeper in ISA Server =

Article ID: 315671

Article Last Modified on 10/26/2002

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APPLIES TO


 * Microsoft Internet Security and Acceleration Server 2000 Standard Edition

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This article was previously published under Q315671



IN THIS TASK
SUMMARY
 * Configuring the Q931 DNS Record
 * Notes



SUMMARY
This step-by-step article describes how to configure DNS Q931 records to support e-mail address calling by using the Internet Security and Acceleration (ISA) Server H.323 Gatekeeper service. The ISA Server H.323 Gatekeeper service was designed to optimize the benefits of LAN-to-LAN calls. When each LAN has an H.323 gatekeeper and H.323 clients (such as Microsoft NetMeeting) registered with their respective gatekeepers, users can call H.323 clients on other networks by using either an e-mail address or a telephone number.

Using an e-mail address to call a destination is the easiest option for most users and administrators. Users do not need to remember phone numbers and administrators do not need to set up routing rules on the ISA Server computer to support calling by an e-mail address. The administrator only needs to create a Q931 resource record entry for the appropriate domain.

The DNS entry should be placed on a publicly-available DNS server. An SRV record for the Q931 service is created on the DNS server to support calling by an e-mail address.

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Configuring the Q931 DNS Record
To configure the Q931 address record for your domain on a Windows 2000 DNS server:  Click Start, point to Programs, point to Administrative Tools, and then click DNS. In the DNS console, right-click your domain, and then click Other New Records. In the Resource Record Type dialog box, click the SRV record type, and then click Create Record. In the New Resource Record dialog box, type the following information:

Service:_q931

Protocol:_tcp

Priority:0

Weight:0

Port Number:1720

Host offering this service:FQDN that resolves to the external interface of the ISA Server

 Click OK to create the record.

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