The telephone numbers of outgoing calls are translated depending on the line that is used:
- SIP lines
- The treatment of the calling-party ID on SIP lines depends upon the line's operating mode:
- Individual account: In the case of an outgoing call over a SIP line, the calling party ID is converted to the number that was entered for the SIP line (SIP ID).
- Trunk and gateway: Please observe the information in section SIP mapping.
- SIP PBX lines
- In the case of an outgoing call over a SIP PBX line, the subscriber is registered at the upstream SIP PBX and is part of the telephone number range there. This is why the calling party ID—which represents the internal telephone number or "extension" of the subscriber in this case—is passed unchanged to the SIP PBX line.
- ISDN lines
- In the case of an outgoing call over an ISDN point-to-multipoint connection, the calling party ID is converted to the MSN that is entered for the subscriber (or the internal telephone number) in the ISDN mapping table. If this does not contain an entry for the number that is currently calling, no calling party ID is sent. Similarly, no calling party ID is sent if CLIR (Calling Line Identifier Restriction) is activated.
