| Setup
of a call using ISUP |
| Setup |
| IAM |
| IAM |
| Setup |
| Q.931 |
| Link-by-link
routing (number analysis) |
| Alert |
| ACM |
| ACM |
| Alert |
| Connect |
| ANM |
| ANM |
| Connect |
|
|
|
| Link-by-link
signalling |
||
| (no number
analysis) |
||