4.6 Blended Addressing

This topic describes how to support blended addressing of directory URIs and directory numbers.

  • Blended addressing inserts both the directory URI and the directory number of the sending party in outgoing SIP messages.
  • To deliver a SIP message with blended addressing, the following conditions must be met:
    • At all SIP trunks along the path, the Calling and Connected Party Info Format SIP trunk parameter must be set to Deliver URI and DN in Connected Party.
    • Both a directory URI and a directory number must be configured at the phone that is sending the SIP message.
    • The receiving endpoint must support blended addressing.

Cisco Unified Communications Manager supports blended addressing of directory URIs and directory numbers.

When blended addressing is enabled across the network, Cisco Unified Communications Manager inserts both the directory URI and the directory number of the sending party in outgoing SIP INVITE messages or in responses to SIP INVITE messages.

Cisco Unified Communications Manager uses the x-cisco-number tag in the SIP identity headers to communicate a blended address. The x-cisco-number tag identifies the directory number that is associated with the directory URI. When both a directory URI and directory number are available for the sending phone and blended addressing is enabled, Cisco Unified Communications Manager uses the directory URI in the From fields of the SIP message and adds the x-cisco-number tag with the accompanying directory number to the SIP identity headers.

To display blended addressing at an endpoint, the following conditions must be met:

  • At all SIP trunks along the path, the Calling and Connected Party Info Format parameter must be set toDeliver URI and DN in Connected Party.
  • The phone that should be identified with blended addressing must be configured with a directory URI that is associated with the directory number of the calling line.
  • The receiving phone must support blended addressing (that is, the x-cisco-number tag needs to be supported).
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