The invention discloses a
system supporting VOIP and CS telephone, which comprises a terminal gateway equipment, a
wireless broadband module, SLIC, SWITCH and a telephone set; the SLIC is used for
bidirectional transmission of SPI and PCM line
signal between the telephone set and the terminal gateway equipment; the SWITCH is used for transmitting VOIP voice code
stream between the terminal gateway equipment and the SLIC, and establishing PCM line from the SLIC to the terminal gateway equipment or the
wireless broadband module to transmit CS voice code
stream; the terminal gateway equipment is used for communicating with the
wireless broadband module to accomplish the voice
signal transmission between infinite broadband network and the terminal gateway equipment; and the
wireless broadband module is used for the network registration and connection of VOIP telephone and the establishing of CS telephone. The invention further discloses a method for supporting VOIP and CS telephone, By using the
system and the method, user can enjoy different voice services according to different service scenes on one telephone set, and
mobile service provider can dispose services according to different situations, improves increment capability, and saves communication cost.