Lieber mas,
dieses Verhalten ist eine Funktion die COLP heisst. That's not a bug, it's a feature.
Hier die Beschreibung der Funktion COLP Connected line identification presentation.
The Connected Line Identification Presentation (COLP) service provides the calling party with the ability to be presented with the identity of the connected party, which may or may not be the dialed party.
The Connected Line Identification Restriction (COLR) service provides the terminating party with the ability to prevent the presentation of his/her identity to the calling party via COLP.
Furthermore, the COLP service also offers a mechanism to maintain the privacy of the connected line identity for the destination of a redirected call. This allows users who redirect their calls to a personal number (for example, a mobile phone) to (optionally) keep this number private and use their business number as a connected line identity. This mechanism is also applicable to other call redirection scenarios such as Hunt Groups and Call Centers, where the pilot number can be delivered as a connected line identity instead of the agent’s number.
The COLP and COLR services are key Integrated Services Digital Network (ISDN) services that are usually offered to primary rate interface (PRI) and basic rate interface (BRI) terminals. The support of COLP/COLR allows BroadSoft to enhance its feature parity in markets where ISDN terminals are being used.
In addition to supporting COLP/COLR for regular Session Initiation Protocol (SIP) users, BroadSoft also works with selected ISDN gateway device partners to extend the COLP/COLR support to ISDN endpoints, namely OneAccess and Dataflex integrated access devices.