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Organization Configuration > Unified Messaging > UM Dial Plans > General Tab

 

Applies to: Exchange Server 2007 SP3, Exchange Server 2007 SP2, Exchange Server 2007 SP1

Topic Last Modified: 2007-07-30

Use the General tab to configure the dial plan settings for Unified Messaging (UM). For example, you can configure UM dial plan settings to include the voice message originator e-mail address, send non-delivery reports, and enable users who are associated with the dial plan to receive faxes. The settings that you configure on the UM dial plan will affect all users who are associated with the dial plan.

Associated servers
  • This section displays the Unified Messaging servers that are associated with a dial plan. The UM servers that are listed in this section process incoming calls for users who are associated with the dial plan.

  • UM servers can be associated with single or multiple dial plans. You must use the UM Server Settings properties tab in the UM server's properties to add a UM server to a dial plan.

Associated UM IP gateways
  • This section displays the UM IP gateways that are associated with a dial plan. The UM IP gateways that are listed in this section process incoming calls for users who are associated with the dial plan.

  • A UM hunt group establishes a link between a UM dial plan and a UM IP gateway and can also be associated with a dial plan by first being associated with a UM IP gateway.

  • You can associate a UM IP gateway with a dial plan when you create a UM hunt group.

URI type
  • A Uniform Resource Identifier (URI) is a string of characters that identify or name a resource. The main purpose of this identification is to enable VoIP devices to communicate with other devices over a network by using specific protocols. URIs are defined in schemes that in turn define a specific syntax and format and the protocols for the call.

  • You can select one of the following URI types for the dial plan:

    • Telephone extension   This is the most common URI type. The calling and called party information from the IP gateway or IP PBX will be listed in one of the following formats: Tel:512345 or 512345@<IP address>. This is the default URI type for dial plans.

    • SIP URI   Use this URI type if you must have a SIP URI dial plan such as an IP PBX that supports SIP routing or if you are integrating Office Communications Server 2007 and Exchange Unified Messaging. The calling and called party information from the IP gateway or IP PBX will be listed as a SIP address in the following format: sip:<username>@<domain or IP address>:Port.

    • E.164   E.164 is an international numbering plan for public telephone systems in which each assigned number contains a country code (CC), a national destination code (NDC), and a subscriber number (SN). The calling and called party information that is sent from the IP gateway is listed in the following format: Tel:+14255551234.

  • After you have created a UM dial plan, you will be unable to change the URI type without deleting the dial plan, and then re-creating the dial plan to include the correct URI type.

Number of digits in extension
  • Use this text box to specify the number of digits in the extension numbers for users who are associated with this dial plan. For example, if a user associated with a dial plan dials a 4-digit extension to call another user in the same dial plan, select 4 as the number of digits in the extension.

  • The number of digits for extension numbers is based on the telephony dial plan that is created on a Private Branch eXchange (PBX). This is a required field that has a value range from 1 to 20. The typical extension length is from 3 to 7 digits.

  • If your existing telephony environment includes extension numbers, you should specify a number of digits that matches the number of digits in those extensions.

Send a non-delivery report if message delivery fails
  • Select this check box to enable a non-delivery report (NDR) to be sent if the voice message could not be delivered.

  • If you enable this option an NDR will not be sent until you associate the 'Microsoft Exchange' recipient with a mailbox. To associate the 'Microsoft Exchange' recipient with a mailbox, see Set-OrganizationConfig.

  • By default, this option is disabled.

Allow users to receive faxes
  • Select this check box to allow fax messages to be received by users who are associated with the dial plan.

  • If you do not select this check box, all users who are associated with the dial plan will be unable to receive fax messages in their Inbox.

  • By default, this setting is enabled.

VoIP security
  • Use this drop-down list to select the VoIP security setting for the UM dial plan.

  • You can select one of the following security settings for the dial plan:

    • Unsecured   By default, when you create a UM dial plan it will communicate in an Unsecured mode, and the Unified Messaging servers that are associated with the UM dial plan will send and receive data from IP gateways, IP PBXs, and other Exchange 2007 computers by using no encryption. In Unsecured mode, both the Realtime Transport Protocol (RTP) media channel and SIP signaling information will not be encrypted.

    • SIP secured   When you select SIP secured, only the SIP signaling traffic will be encrypted and the RTP media channels will still use Transmission Control Protocol (TCP), which is not encrypted. Mutual Transport Layer Security (MTLS) is used to encrypt the SIP signaling traffic.

    • Secured    When you select Secured, both the SIP signaling traffic and the RTP medial channels are encrypted. A secure signaling media channel that uses Secure Realtime Transport Protocol (SRTP) also uses MTLS to encrypt the VoIP data.

  • A Unified Messaging server can operate in any mode that is configured on a dial plan because the Unified Messaging server is configured to listen on TCP port 5060 for unsecured requests and TCP port 5061 for secured requests at the same time.

After you configure the options on this tab, click Apply to accept the changes.

 
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