For all mandatory SS7 Information Elements that do not have tags supplied, or part-completed tags, these fields are filled by the system defaults. Refer to Configuration files for more information. The following table shows a list of valid tags, describes the relationship between call activities, and indicates when tags can be used. If any unsupported tags are used, they are silently ignored.
| Tag Name | Inbound call setup (SV542) | Outbound call setup (SV541) | Inbound call termination | Outbound call termination |
|---|---|---|---|---|
| USR2USR | ✓ | ✓ | ✓ | ✓ |
| CLDN | ✓ | ✓ | × | × |
| CLGP | ✓ | ✓ | × | × |
| ORIGIN | ✓ | ✓ | × | × |
| REDIRN | ✓ | ✓ | × | × |
| REDINFO | ✓ | ✓ | × | × |
| CHARGEN | ✓ | ✓ | × | × |
| UTI | ✓ | ✓ | × | × |
| USI | ✓ | ✓ | × | × |
| CAUSE | × | × | ✓ | ✓ |
| NEWCLDN | × | × | × | ✓ |
| PROTOCOL | ✓ | × | ✓ | × |
| GENERICADDR | ✓ | ✓ | ✓ | ✓ |
| ISUPPARM | ✓ | ✓ | ✓ | ✓ |
| SERVICEACTIVATION | × | × | ✓ | ✓ |
| JINFO | ✓ | ✓ | × | × |
| PINFO | ✓ | ✓ | × | × |