This is our standard SIP trunk header configuration.
Inbound SIP Header
| Name | Value |
|---|---|
Inbound User-Provided Number | P-Preferred-Identity (PPI) or FROM Header |
| Inbound User-Provided Redirecting Number | Forwarder's NPN / Received Diversion |
Beware: Inbound means the direction from your SIP client to our SIP server.
Outbound SIP Header
| Name | Value |
|---|---|
| Outbound From-Username Field | UPN (User-Provided-Number) |
| Outbound From-Display Field | Received Display-Name |
| Outbound PAI-Username Field | UPRN (if set) or NPN |
| Outbound PPI-Username Field | NPN (Network-Provided-Number) |
| Outbound Diversion Header | UPRN (User-Provided-Redirection-Number) |
| Outbound History-Info Field | UPRN (User-Provided-Redirection-Number) |
| Outbound To-Username Field | Called user |
Beware: Outbound means the direction from our SIP server to your SIP client.
Other Values
| Name | Value |
|---|---|
| Use valid Alias CLI as NPN | yes |
| Incoming Dialed Number Matching | Extended matching, send dialed number with extension |
| Add user=phone to calling number | no |
| Add user=phone to calling number | no |
| Skip UPN check on Diversion | yes (If user in received Diversion or History-Info is in callers's alias list) |
