OpenCNAM has several interfaces available through which customers may perform CNAM queries. This document details the system and method for querying OpenCNAM using a RESTful API and provides integration instructions for FreePBX. OpenCNAM provides a Caller ID Lookup service that adds Caller ID Name to inbound calls on FreePBX systems easily and economically. When a phone service provider sends calls to the PBX with only a number as Caller ID, the number can be looked up using the OpenCNAM service to get the correct Caller ID Name. The Caller ID Name is attached to the incoming call before it is routed to its destination in FreePBX, so that it displays on phone calls and in call logs.
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