SCCP Route SSN Backup Point Code
From TBwiki
If the SSN on the route's DPC is unavailable, the SCCP stack will attempt to send the MSU to the first available SP among the list of Backup Point Codes.
- An SCCP route for each Backup Point Codes in the list must exist
- The Backup Point Codes route must be configured with the same SSN
- Only SCCP message with RI=SN are eligible to SSN backup routing.
