Patent CA-2008224-C (CA)
Title: Equipment and method for management of terminal identification number in communication system
Inventor: NAKAYAMA YASUNOBU
IPC: H04Q3/58
Filed: 1990-01-22
Granted: 1994-05-03
Abstract: ABSTRACT       An  equipment  for  management of  terminal identification  numbers  in  a  communication  system including a center and a plurality of terminals connected to  the  center,  identification  numbers  of  respective terminals registered in advance being attached to data communicating  between  the  center  and  the  respective terminals; each of the terminals comprising: (a) terminal side  memory  means  (51)  for  registering  the  terminal identification  numbers  therein,  initial  identification numbers initially registered; (b) means for communication with the center (33, 211, 213, 215, 217, 219, 223, 225, 227), for effecting data communication with the center; (c)  terminal side registration means  (13!  19,  53)  for erasing the initial identification numbers registered in the  terminal  side  memory  means  to  register  the  new terminal identification; numbers and the center into the terminal side memory means;  (d)  terminal  side control means (221, 229) operative so that when an arbitrary one of  the  terminals  is  communicatably  connected  to  the center,  the  control  means  delivers  a  predetermined registration request data to the means for communication with  the  center  to  allow  the  communication  means  to transmit  it  to  the  center,  thereafter  to permit  the terminal  side  registration  means  to  execute  the registration of the terminal identification numbers only when a predetermined registration command from the center is  received  by  the  means  for  communication  with  the center;  the center comprising:  (e)  center  side memory means (61a) for registering identification numbers of all terminals  therein  the  initial  identification  numbers being  initially  registered  with  respect  to  all  the terminals; (f) means for communication with the terminals (67,  241,  245,  247),  for  effecting data  communication with the terminals; (g) authorize means (248) for giving, to the terminal, authorization of the registration of the terminal identification numbers at least on the condition that the registration reaquest data from the terminal is received  by  the  means  for  communication  with  the terminals;  (h)  overlap check means  (251)  for  checking whether or not the terminal identification number to be registered and the other previously registered terminal identification numbers in the center side memory means overlap with each other;  (i)  center  side  registration means (252) for erasing the initial identification number registered in the center side memory means to register the terminal identification number to be registered when the  authorization  is  given  and  a  checked  result indicative of no overlap is obtained from the overlap check means; (j) and center side control means (243) for transmitting the registration command through the means for  communication  with  the  terminals  when the authorization is given and a checked result indicative of no overlapping  is obtained from the overlapping check means,  thereby permitting registration of the terminal identification number to be registered into the terminal memory means.