Poc Communication System, Method for the Transmitting Poc Signalling and/or Poc Data, and a Server Device Therefor

The invention relates to a server device (S4) for connecting an independent non-PoC-compatible subscriber station (T2, T3) of a communication network (PSTN; ISDN; GSM) for pseudo PoC communication to a PoC communication system (IMS). Said server device comprises a first interface (II) as a PoC interface for creating a PoC connection (PoC) to the PoC communication system (IMS) in the manner of a PoC client; a second interface (12) for establishing a pseudo PoC connection (PoC*) to the independent non-PoC-compatible subscriber station (T2; T3) in the form of a speech communication connection; and a conversion device (TC) for converting PoC signallings and PoC data of the PoC connection (PoC) into signals and data of the pseudo PoC connection (PoC*) and vice versa. The invention also relates to a PoC communication system and a method for transmitting a PoC signalling and/or PoC data using one such server device.