| 摘要 |
PURPOSE:To attain communication with plural cordless terminals for one connection device by matching a diffusion and inverse diffusion code of the connection device with that of the cordless terminal. CONSTITUTION:Cordless terminals 1-3 are accommodated in an electronic exchange comprising a connection device 4, a time division switch 27 and a central control unit. Code generators 6, 11, 16 at each terminal have prescribed codes PN1, PN2 and PN3 and diffuse a transmission signal by the codes PN1, PN2, PN3 and inversely diffuse the reception signal by the codes. On the other hand, a code generator 21 of the connection device 4 have codes diffusing the transmission signal and inversely diffusing the reception signal in matching with the codes PN1, PN2 and PN3 of the cordless terminal. In making communication of the connection device 4 with the terminal 1, the same code PN1 as that of the code generators 21, 6 is decided from a CPU 28 via a control section 25. Through the constitution above, the number of connection devices is decreased, thereby obtaining economical effects. |
