| 摘要 |
A method for identifying at least one port (A, B) assigned to a Centrex group in a telecommunication system (SYS) with a plurality of Centrex switching centers (VSA, VSB) connected to each other via a telecommunication network (NET), to each of which at least one Centrex group port (A, B) is assigned, with a virtual and physical call number (PRA) of the calling port (A) being transferred, when a call is set up from a port (A) of a first switching center (VSA) to a port (B) of a second switching center.
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