This feature allows the IMG to route ported numbers for SIP and SS7.
The IMG complies with the following:
RFC3398 Section 7.2.1.1 (INVITE to IAM procedures) for SIP to SS7 call scenarios.
RFC3398 Section 8.2.1.1 (IAM to INVITE procedures) for SS7 to SIP call scenarios
A basic LNP scenario is shown below.
Subscriber A=508-4445555 is calling Subscriber B=508-8623606
Subscriber B has been ported and the LEC servicing B is LEC2 and its
LRN=333-2233445
Note: The IMG does not perform the LNP.
This feature will add the support of 2 new tags in the R-URI:
rn - This tag is used to convey the location routing number.
npdi - This is used to indicate whether an LNP query has been performed.
INVITE sip:3606;rn=2233445566;npdi=yes@10.129.43.23:5060 SIP/2.0
INVITE sip:3606;rn=2233445566;npdi@10.129.43.23:5060 SIP/2.0
INVITE sip:3606;npdi=yes@10.129.43.23:5060 SIP/2.0
INVITE sip:3606;npdi@10.129.43.23:5060 SIP/2.0
This feature will interwork between the SS7 LNP information and SIP.
Enabling or Disabling LNP Routing is accomplished in the ISUP Group pane.