Reference13r1:Concept Reverse Lookup

From innovaphone-wiki

Jump to: navigation, search

With the reverse lookup feature the PBX does the lookup of calling or called numbers in an external directory so that not each endpoint has to do the same lookup again. The result of the lookup is sent to the endpoints using name id facilities and is stored in the CDRs so that it can be displayed in call lists.


Available since 13r1 release


For reverse lookup there are two configuration parameters: The LDAP URL as command line parameter at the PBX and a crypted VAR for the LDAP password:

Command line parameter for the LDAP URL according to RFC 2255
The VAR for the password

In short the format of the URL is as follows:

The path in the LDAP directory, e.g. dc=entries
The list of attributes to be returned, e.g. givenname,sn,company
The scope. Could be "base", "one", "sub"
The LDAP filter used for the search, e.g. (metaSearchNumber=+%n)
Used for the bind name, e.g.\contacts

Inside the LDAP URL placeholders can be used, which are replaced by the actual information:

The number which should be looked up. It is provided in e.164 international format without prefixed or '+' at the beginning
The H323-Id (SIP URI) of the user on behalf of which the lookup is performed


The result of the lookup is stored in the CDRs as the results of the lookup are available, so the events for the lookup results are not necessarily next to the related events. To allow matching of the reverse lookup result to the looked up number in the event the name and as reference the looked up number is stored. The event in the CDR is formated as follows:

<event msg="lookup"><ep e164="<reference number>" dn="<looked up name>"/></event>
Personal tools