Acknowledge back pager with frequency control apparatus

Details Acknowledge back pager with frequency control apparatus Acknowledge back pager with frequency control apparatus

G - Physics

08

B

325/18, 325/41

G08B 5/22 (2006.01) G08B 3/10 (2006.01) H04Q 7/12 (2006.01)

Patent

CA 1288819

ABSTRACT OF THE DISCLOSURE An acknowledge back (ack-back) pager is provide for use in a paging system which includes a central station which transmits a group of message signals to a group of ack-back pagers which are addressed as a group. The users of the group of addressed ack-back pagers indicate a response to their respective pagers thus providing ack-back data. The pagers in the group of addressed ack-back pagers then simultaneously transmit back to the central station their ack-back data on different frequency sub-bands, a different frequency sub-band being allocated to each of the pagers in the group. The invention provides apparatus for controlling the frequency of the selected sub-band with very high accuracy.

583083

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