About this document
SIP to ISUP Cause Code Mapping Guide by Dario Alfaro is a document available to read on EtoBox.
The document provides mappings between SIP response codes and ISUP cause codes. Some common mappings include mapping 404 Not Found to cause codes for unallocated number, no route to network, or no route to destination. Busy here is mapped to 486 Busy Here and 480 Temporarily Unavailable is mapped to causes for subscriber absent or no answer. 503 Service Unavailable maps to causes for network issues like out of order, congestion, or resources unavailable.
- Author
- Dario Alfaro
- Language
- EN