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Create a UM Dial Plan

 

Applies to: Exchange Server 2010 SP3, Exchange Server 2010 SP2

Topic Last Modified: 2013-01-10

A Unified Messaging (UM) dial plan is created by using an organization-wide scope. This dial plan contains configuration information related to your telephony network. It also establishes a link from the telephone extension number of a Microsoft Exchange Server 2010 recipient in Active Directory to a UM-enabled mailbox.

When you create a UM dial plan, you can configure the number of digits in the extension numbers, the Uniform Resource Identifier (URI) type, and the Voice over IP (VoIP) security setting. Every time that you create a UM dial plan, a UM mailbox policy is also created. The UM mailbox policy is named <DialPlanName> Default Policy.

Looking for other management tasks related to UM dial plans? Check out Managing UM Dial Plans.

You need to be assigned permissions before you can perform this procedure. To see what permissions you need, see the "UM dial plans" entry in the Unified Messaging Permissions topic.

  1. In the console tree, navigate to Organization Configuration > Unified Messaging.
  2. In the action pane, click New UM Dial Plan.
  3. In the New UM Dial Plan wizard, complete the following fields:
    • Name   Type the name of the dial plan. A UM dial plan name is required and must be unique. However, it's used only for display in the EMC and the Shell. If you have to change the display name of the dial plan after it's been created, you must first delete the existing UM dial plan and then create another dial plan that has the appropriate name. If your organization uses multiple UM dial plans, we recommend that you use meaningful names for your UM dial plans. The maximum length of a UM dial plan name is 64 characters. The name can't include any of the following characters:

       

      " / \ [ ] : ; | = , + * ? < >

      Although you can include spaces in the name of a new UM dial plan, the name cannot include spaces if you integrate Unified Messaging with Office Communications Server 2007 R2 or Microsoft Lync Server. Therefore, if you created a dial plan that has spaces in the display name, and if you are integrating with Office Communications Server 2007 R2 or Microsoft Lync Server, you must first delete that dial plan, and then create another by using a display name that does not include spaces.
      importantImportant:
      Although the field for the name of the dial plan can accept 64 characters, the name of the dial plan can't be longer than 49 characters. If you try to create a dial plan name that contains more than 49 characters, you will receive an error message. The message will say that the dial plan name couldn't be created because a default UM mailbox policy name couldn't be generated because the UM dial plan name is too long. This happens because when you create a dial plan, a default UM mailbox policy is also created that has the name <DialPlanName> Default Policy. Therefore, the name of the UM mailbox policy is 15 characters longer than the name of the dial plan. The name parameter for both the UM dial plan and UM mailbox policy can be 64 characters. However, if the name of the dial plan is longer than 49 characters, the name of the default UM mailbox policy will be longer than 64 characters, and this isn't allowed by the system.
    • Number of digits in extension numbers   Enter the number of digits for the dial plan. The number of digits for extension numbers is based on the telephony dial plan created on a Private Branch eXchange (PBX). For example, if a user associated with a telephony dial plan dials a four-digit extension to call another user in the same telephony dial plan, you select 4 as the number of digits in the extension.
      This is a required field that has a value range from 1 through 20. The typical extension length is from 3 through 7. If your existing telephony environment includes extension numbers, you must specify a number of digits that matches the number of digits in those extensions.
      When you create a Session Initiation Protocol (SIP) or an E.164 dial plan and associate a UM-enabled user with the dial plan, you must still input an extension number to be used by the user. This number is used by Outlook Voice Access users when they access their Exchange 2010 mailbox.
    • URI Type   Use this drop-down list to select the URI type for the UM dial plan. A URI is a string of characters that identifies or names a resource. The main purpose of this identification is to enable VoIP devices to communicate with other devices over a network using specific protocols. URIs are defined in schemes that define a specific syntax, 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 need a SIP URI dial plan when an IP PBX supports SIP routing or if you're integrating Microsoft 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/region code, a national destination code, and a subscriber number. The calling and called party information sent from the IP gateway is listed in the following format: Tel:+14255550123.
      noteNote:
      After you create a 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.
    • VoIP Security   Use this drop-down list to select the VoIP security setting for the UM dial plan. By default, when you create a UM dial plan, it communicates in unsecured mode. A Unified Messaging server can operate in any mode configured on a dial plan because the Unified Messaging server is configured to listen on TCP port 5060 for unsecured requests and on TCP port 5061 for secured requests at the same time.
      You can select one of the following security settings for the dial plan:
      Unsecured   By default, when you create a UM dial plan, it communicates in unsecured mode, and the Unified Messaging servers associated with the UM dial plan send and receive data from IP gateways, IP PBXs, and other Exchange 2010 computers using no encryption. In unsecured mode, both the Realtime Transport Protocol (RTP) media channel and SIP signaling information aren't encrypted.
      SIP secured   When you select SIP secured, only the SIP signaling traffic is encrypted, and the RTP media channels still use TCP, which isn't encrypted. Mutual Transport Layer Security (TLS) is used to encrypt the SIP signaling traffic.
      Secured   When you select Secured, both the SIP signaling traffic and the RTP media channels are encrypted. An encrypted signaling media channel that uses Secure Realtime Transport Protocol (SRTP) also uses mutual TLS to encrypt the VoIP data.
    • Country/Region code   Use this field to type the country/region code number used for outgoing calls. This number will precede the telephone number dialed. This field accepts from 1 through 4 digits. For example, in the United States, the country/region code is 1. In the United Kingdom, it's 44.
  4. On the Set UM Servers page, click Add, and then, on the Select UM Server page, select the UM server that you want to add to the UM dial plan.
  5. On the Completion page, confirm whether the dial plan was successfully created:
    • A status of Completed indicates that the wizard completed the task successfully.
    • A status of Failed indicates that the task wasn't completed. If the task fails, review the summary for an explanation, and then click Back to make any configuration changes.
  6. Click Finish to complete the New UM Dial Plan wizard.

You need to be assigned permissions before you can perform this procedure. To see what permissions you need, see the "UM dial plans" entry in the Unified Messaging Permissions topic.

This example creates a new UM dial plan named MyUMDialPlan that uses four-digit extension numbers.

New-UMDialplan -Name MyUMDialPlan -NumberofDigits 4

This example creates a new UM dial plan named MyUMDialPlan that uses five-digit extension numbers and supports SIP URIs:

New-UMDialplan -Name MyUMDialPlan -UriType SIPName -NumberofDigits 5

For more information about syntax and parameters, see New-UMDialplan.

After you enable a user for Unified Messaging, you may also want to:

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