- An external user A (at a SIP PBX line) makes a call to an internal user B (SIP, ISDN or analog).
- A makes an additional call to an external user D (who is also a subscriber to the same SIP PBX line as A).
- The external user A then initiates a connect from B to D. The R&S®NC VoIP router needs to establish a connection to D for this.
Note: The R&S®NC VoIP router can only establish this connection if D can be reached via the same
SIP-PBX line as A, i.e. if external call forwarding is permitted.
Note: Requires that the VoIP PBX fully supports Transfers in SIP (re-invites).
