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MPP Reverse Name Lookup for Incoming and Outgoing Calls



Reverse name lookup searches for the name of a number in an incoming, outgoing, conference, or transfer call. The reverse name lookup acts when the phone cannot find a name using the service provider directory, Call History, or your contacts. Reverse name lookup needs a valid LDAP Directory or XML Directory configuration.

The reverse name lookup searches the phone's external directories. When a search succeeds, the name is placed in the call session and in the call history. For simultaneous, multiple phone calls, reverse name lookup searches for a name to match the first call number. When the second call connects or is placed on hold, reverse name lookup searches for a name to match the second call.

Reverse name lookup is enabled by default.

Reverse name lookup searches the directories in the following order:

  1. Phone contacts
  2. Call History
  3. LDAP Directory
  4. XML Directory


Please note, the phone searches the XML directory using this format: directory_url?n=incoming_call_number

Example: For a multiplatform phone using a third-party service, the phone number (1234) search query has this format,

Enable and Disable Reverse Name Lookup

Before enabling or disabling Reverse Name Lookup, be sure to configure one of the following:

  • LDAP Corporate Directory
  • XML Directory


  1. Login to http://IP_ADDRESS_PHONE/admin/advanced
  2. Navigate to Voice --> Phone
  3. In the Supplementary Services area, set the Reverse Phone Lookup Serv to:
  • Yes –Enable the reverse name lookup feature.
  • No –Disable the reverse name lookup feature.

You can also configure Reverse Name Lookup via the xml file:

<Reverse_Phone_Lookup_Serv ua="na">Yes</Reverse_Phone_Lookup_Serv>