| 摘要 |
The invention relates to a circuit arrangement for transmission of system-individual location identifiers between a plurality of centrally controlled in-house telephone systems of one or more communications networks, where each of the in-house telephone systems has a central through-connection network which can be controlled by a respective central control device, via which network internal and external in-house telephone system call through-connections can be controlled between subscriber devices connected to the central through-connection network. The in-house telephone systems (BF A, B) in each case have the identifier memory (KSP) to hold the system-individual location identifier, the information content of which memory can be retrieved by an identifier prompt signal transmittable via the connection path (SK) and can be transmitted with the aid of the central control device (CC) via the central signalling channel (ZZK) to the calling in-house telephone system (BF A). The digital subscriber device (TD A) has the alphanumeric display device (DPL) which, with the aid of the signal conversion device (SUE), is connected to the through-connected speech connection path via the voice channel (SK). In-house telephone systems of this type are used in particular by power supply companies for maintenance purposes. <IMAGE>
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