Patent TW-318982-B (TW)
Title: Cordless switching system without host switching station
Inventor: PAN YUAN-SHENG
IPC: H04B7/00
Filed: 1997-02-04
Granted: 1997-11-01
Abstract: A cordless switching system without host switching station consists of several host stations and several cordless telephone, in which each base station is connected to end office network system via h lines, and cordless transceiver on base station and cordless telephone can switch to one channel as signal channel among L+1 cordless channel, and the L+1 cordless channel includes L bi-directional communication channel and one bi-directional signaling channel, in which each base station comprises of: (1) one switching unit, via bi-directional trunk independently connected to line circuit of end office switching network; (2) one controller, used to control the system operation; (3) one transceiver, consisting of one transmitter and one receiver, in which the transmitter and receiver operation and channel selection are under the control of controller; (4) one duplex transceiver, installed with one antenna, output end of transmitter is connected to duplex transceiver, and input end of receiver is connected to duplex transceiver, under the control of controller, transmitting the signal to be transmitted via duplex transceiver and its antenna, supplied to be received by telephone, and transmitted signal from each telephone is also sent to line via the antenna and duplex transceiver and under the control of controller; (5) one state memory, connected to controller, used to memorize master-slave relationship of base stations, channel usage condition, and any other data related with used line number in whole system, controller reading data stored inside state memory in order to control operation of transmitter, receiver, switching unit etc. related unit and system operation; (6) one state control and display region, used to supply user to manipulate base station operation and display its working condition; (7) AM/FM cabling communication device, used as voice communication channel between each base station; (8) one FSK cabling communication device, used as data communication channel between each base station; (9) and each cordless telephone includes: (10) one controller, used to control telephone operation; (11) one transceiver, consisting of one transmitter and receiver, in which the transmitter and receiver operation and channel selection are under the control of controller; (12) one duplex transceiver,installed with one antenna, output end of transmitter is connected to duplex transceiver, and input end of receiver is connected to duplex transceiver, under the control of controller, in which received signal is connected to telephone transmitter via one switch, both switch operation is under the control of controller, controller also controlling selected channel of the transmitter and receiver in order to execute inter-phone talk between handset and handset, base station, and external line; (13) one state memory, connected to controller, when controller via receiver receives channel selection signal sent from base station controller, used to store station identification number of selected handset and relating used line number; (14) one state control and display region, used to supply user to manipulate handset operation and display its working condition.