Methods and system for fast session establishment between equipment using H.324 and related telecommunications protocols

The invention claims a reducing is calling to the set time in the same H.324 terminal method. The invention relates to i (a) method and device, and calling starting the link flowing the H.245 message for transmitting the terminals arranged media information of terminal and capability must be exchanged/data type/format to obtain consistently, a (II) and a method and device; and non-standard H.245 message or with the non-standard field standard H.245 message to accelerate an earphone, and checking door) and a method and device, inform each terminal the terminal capability, and user definition field is formed by calling signal transmission protocol is suggested exchanged media information/data type/format, and (iv) and aMethod and device, for informing each terminal the terminal capability, and using is connected to the second code is filled with the control and serial bit to suggest on the bearing channel media information and data of type and format flowing exchange.