How maintenance of voice communication in crowded communication channel

摘要

The present invention relates to a communication system, and, in the voice communication between the sender and the receiver, to a method maintaining voice communication when a communication channel currently carrying the transmission of voice communication is congested . Communication channel, and at least one payload channel has at least one signaling channel, a predetermined quality of service. During voice communication, service quality of the payload channel is monitored. If the quality of service payload channel is below a predetermined threshold value, voice calls corresponding transmission side is converted to text, via the holding communication channel, it is transmitted to the corresponding receiver. The text can be converted back at the receiving side to the voice call