Mobile phone subscriber exchange, can set up data connection between control and telephone operator desk units via public IP network

摘要

An information transfer data connection (8, 8a, 8b) can be set up between the control unit (6b) and a telephone operator desk unit (6c) via a public IP-network (9). The control unit is connected to a switching unit (6a) for carrying out one or more of the standard switching functions of the exchange.