1. Essentials Guide
  2. Oracle USM Supporting the IMS Core
  3. Tel-URI Resolution
  4. Number Lookup Triggers

Number Lookup Triggers

Use cases that are applicable to number lookups and the associated Oracle Communications Unified Session Manager procedures include:

  • Request from the access side:
    1. The Oracle Communications Unified Session Manager performs originating services.
    2. If the R-URI is a tel-URI or SIP-URI (with user=phone), it requests e.164 resolution from the ENUM server(s), regardless of its presence in the registration cache.
  • Request from core side including request for originating services:
    1. The Oracle Communications Unified Session Manager performs originating services.
    2. If the R-URI is a tel-URI or SIP-URI (with user=phone), it requests e.164 resolution from the ENUM server(s), regardless of its presence in the registration cache.
  • Request from core side, for terminating services only:
    1. If the R-URI is a tel-URI or SIP-URI (with user=phone) and is not in the Oracle Communications Unified Session Manager cache, it performs an LIR.
    2. If the LIA reply indicates the tel-URI or SIP-URI (with user=phone) is not provisioned, the Oracle Communications Unified Session Manager requests e.164 resolution from the ENUM server(s).