3、m,callroutingandtroubleintotrouble.Thedesignofthewirelessunittocallthemainsystemisdividedintotwoparts,transmittingandreceiving.Ofwhichtherearefourcall-channelsystemforthefourwardbeds or usethedatatocodecchipPT2262andPT2272atthecore,usedtosendandreceivewirelesstransmissionmodule,