Patent ID: 6272358
Filing Date: 2001-08-07
Classification: H04M,H04W

Abstract:
In a telecommunication system for connection to wireless stations, said wireless stations equipped with Vocoders, apparatus for by-passing Vocoders for converting between vocoded signals, and public switched telephone network digital signals for a call between two wireless stations, comprising:apparatus for accessing a high speed data network interconnecting switches serving said wireless stations; andapparatus for transmitting vocoded voice frames received from a mobile station to said apparatus for accessing said high speed data network when in a Vocoder by-pass state;apparatus for establishing a PCM (Pulse Code Modulation) connection for a call between said switches serving said mobile stations;wherein the PCM connection is established simultaneously with the connection in said high speed data network, but signals are sent only over one of the connections;wherein a switch between a Vocoder by-pass connection and a connection using Vocoders is detected by the presence of signals in the connection not previously used, or the absence of signals, in the connection previously used.