Dialogic 4000 Media Gateway Series SU4.1 Reference Guide
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LDAP
The Lightweight Directory Access Protocol (LDAP), is an application protocol that programs
use for querying information from a server. The protocol runs over TCP/IP. Deployments
today tend to use Domain Name System (DNS) names for structuring the topmost levels of
the hierarchy. LDAP servers index all the data in their entries, and "filters" can be used to
select the person or group for which you are looking. LDAP is appropriate for any kind of
directory-like information, where fast lookups and less-frequent updates are the norm. For
example, when you use Microsoft
®
Outlook and search the address book for a colleague,
you access the Microsoft
®
Active Directory database via LDAP.
How to Use LDAP to Access Active Directory for Routing Calls via
Diva SIPcontrol
You can enable LDAP functionality via Diva SIPcontrol web configuration. When LDAP is
activated, Diva SIPcontrol will query the server on startup and store the query results
internally for a faster lookup. In a default configuration, this internal storage will be updated
once a day to reflect changes on the LDAP database. If you use LDAP, you need to configure
two routes for one LDAP call:
One route should contain the LDAP destination.
The other route should contain the final destination.
The order of the routes is irrelevant, but it is important to configure the first route with the
conditions needed to avoid recursion.
Use Case for LDAP
In this scenario, the gateway is connected between the PSTN or PBX and a VoIP endpoint.
Additionally, the gateway receives a call from the TDM network that is intended for the VoIP
endpoint. However, the VoIP endpoint does not respond to the original INVITE request or it
responds with a failure. The gateway must query the Active Directory server to determine if
there is an alternate address (i.e. phone number, etc.) where the VoIP endpoint can be
contacted, and if so, the gateway must route the call to the alternate address.
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