Radio telephone system control apparatus and method

Claim 2

A radio telephone system control apparatus comprising: a plurality of radio telephone sets, each having a slave radio set; a master apparatus connected to a wired telephone channel and including a master radio set which exchanges signals between said slave radio sets of said radio telephone sets and said master apparatus; characterized by means responsive to an origination operation of either one of said radio telephone sets for sending an origination signal from said slave radio set of said radio telephone set to the master radio set of said master apparatus; means responsive to said origination signal for sending a channel designating signal to said slave radio set of said radio telephone set from said master radio set of said master apparatus and for switching a radio channel of said master radio set of said master apparatus to said radio channel corresponding to said radio channel designating signal; means responsive to said channel designating signal for switching the radio channel of the slave radio set of said radio telephone set to that corresponding to said channel designating signal; whereby connection control of said radio telephone set and a wired telephone channel is effected by a single master apparatus based on an origination of either one of a plurality of radio telephone sets. -

Claim 3

The radio telephone system control apparatus according to claim 1 wherein the channel designating signal from the master radio set of said master apparatus to said slave radio set of said radio telephone sets is to all slave telephone sets of said radio telephone sets so that the radio channels of the slave radio sets of all radio telephone sets are switched to a radio channel corresponding to said channel designating signal.

Claim 4

The radio telephone system control apparatus according to claim 1 wherein sending out of said channel designating signal to said slave radio sets of said radio telephone sets from the master radio set of said master apparatus is done for only the slave radio set of said radio telephone sets, which has generated an origination, so that only the radio channel of the radio set of the originated radio telephone set is switched to a radio channel corresponding to said channel designating signal.

Claim 5

The radio telephone system control apparatus according to claim 1 which further comprises means responsive to said origination signal for sending a call signal to the slave radio set of a radio telephone set other than the master radio set of said originated master apparatus, and means responsive to said call signal for sending a call response signal to the slave radio set of said radio telephone set.

Claim 6

The.radio telephone system control apparatus according to claim 4 wherein said channel designating signal is sent to the slave radio set of said radio telephone set from the master radio telephone set of said master apparatus only after the call response signal from the slave radio set of said radio telephone set has been generated in response to said call signal.

Claim 7

The radio telephone system control apparatus according to claim 4 wherein when the fact that a call response signal from the slave radio set of said radio telephone set is generated in response to said call signal is not confirmed, said channel designating signal is sent to the slave radio set of said radio telephone set from the master radio set of said master apparatus, a predetermined interval after sending out said call signal.

Claim 8

The radio telephone system control apparatus according to claim 1 wherein said channel designating signal sent to the slave radio set of said radio telephone set from the master radio set of said master apparatus is added with an identifying code for identifying an addressed radio telephone set.

Claim 9

The radio telephone system control apparatus according to claim 1 wherein said call signal sent to the master radio set of said master apparatus from the slave radio set of said radio telephone set is added with an identifying code for identifying a radio telephone set which has sent out said call signal.

Claim 10

The radio telephone system control apparatus according to claim 4 wherein said call signal sent to the slave radio set of said radio telephone set from the master radio set of said master apparatus is added with an identifying code that identifies an addressed radio telephone set.

Claim 11

The radio telephone system control apparatus according to claim 4 wherein the call response signal sent to the master radio set of said master apparatus from the slave radio set of said radio telephone set is added with an identifying code for identifying the radio telephone . set which has sent out said call response signal.

Claim 12

The radio telephone system control apparatus according to claim 1 wherein said master radio set of said master apparatus arrests a control channel under a waiting state, and wherein the radio channel of the master radio set of said master apparatus is switched to said speech channel from said control channel in response to said channel designating signal.

Claim 13

The radio telephone system control apparatus according to claim 1 wherein said master radio set of said master apparatus arrests a predetermined speed channel in a waiting state and wherein the radio channel of the master radio set of said master apparatus is switched from said predetermined speech channel to other speech channel in response to said channel designating signal.

Claim 14

A radio telephone system control apparatus comprising: a plurality of radio telephone sets each having a slave radio set; a master apparatus including a master radio set connected to at least one wired telephone channel for exchanging signals between said master apparatus and the slave radio set of said radio telephone set; characterized by means responsive to an origination operation of either one of said radio telephone sets for sending an origination signal of the master radio set of said master apparatus from the slave radio set of said radio telephone set which has generated an origination; means responsive to said originating signal for detecting a state of use of a wired telephone channel connected to said master apparatus for sending an idle office line signal representing an idle telephone channel to a slave radio set of said originated radio telephone set from a master radio set of said master apparatus; means provided for said radio telephone set for displaying an idle telephone channel based on said idle office line signal; means for sending an office line designating signal from the slave radio set of said originated radio telephone set to the master radio set of said master apparatus in accordance with a selection of the idle telephone channel of said originated radio telephone set; means responsive to said office line designating signal for sending a channel designating signal to the slave radio set of said radio telephone set from the master radio set of said master apparatus and for switching the radio channel of the master radio set of said master apparatus to a radio channel corresponding to said channel designating signal; thereby controlling the connection of a radio telephone set and a wired telephone channel corresponding to an office line designating signal with a single master apparatus in accordance with an origination from either one of a plurality of radio telephone sets.

Claim 15

A radio telephone system control apparatus comprising: a plurality of radio telephone sets each having a slave radio set; a master apparatus including a master radio set connected to at least one wired telephone channel for exchanging signals between said master apparatus and the slave radio set of said radio telephone set; characterized by means responsive to an origination operation of either one of said radio telephone sets for sending an origination signal of the master radio set of said master apparatus from the slave radio set of said radio telephone set which has generated an origination; means responsive to said originating signal for detecting a state of use of a wired telephone channel connected to said master apparatus for sending an idle office line signal representing an idle telephone channel to a slave radio set of said originated radio telephone set from a master radio set of said master apparatus; means provided for said radio telephone set for displaying an idle telephone channel based on said idle office line signal; means for sending an office line designating signal from the slave radio set of said originated radio telephone set to the master radio set of said master apparatus in accordance with a selection of the idle telephone channel of said originated radio telephone set; means responsive to said office line designating signal for sending a channel designating signal to the slave radio set of said radio telephone set from the master radio set of said master apparatus and for switching the radio channel of the master radio set of said master apparatus to a radio channel corresponding to said channel designating signal; thereby controlling the connection of a radio telephone set and a wired telephone channel corresponding to an office line designating signal with a single master apparatus in accordance with an origination from either one of a plurality of radio telephone sets.

Claim 16

The radio telephone system control apparatus according to claim 13 wherein the sending out of the channel designating signal to the slave radio set of said radio telephone set from the master radio set of said master apparatus is made only to the slave radio set of the originated radio telephone set so that only the radio channel of the slave radio set of the originated radio telephone set is switched to a radio channel corresponding to said channel designating signal.

Claim 17

The radio telephone system control apparatus according to claim 13 wherein an idle office line signal and a channel designating signal which are sent from the master radio set of said master apparatus to the slave radio set of said radio telephone set are added with identifying codes that identify an addressed radio telephone set.

Claim 18

The radio telephone system control apparatus according to claim 13 wherein an origination signal and an office line designating signal which are sent from the slave radio set of said radio telephone set to the master radio set of said master apparatus are added with identifying codes that identify the addressed originating telephone set.

Claim 19

The radio telephone control apparatus according to claim 13 which further comprises means for generating an alarm when the slave radio set of said originated radio telephone set does not receive an idle office line signal from the master radio set of said master apparatus within a predetermined interval after sending out said origination signal.

Claim 20

The radio telephone system control apparatus according to claim 13 further comprising means responsive to said office line designating signal for sending a used office line signal representing a used telephone channel state to the slave radio set of a radio telephone set other than a radio telephone set called by the master radio set of said master apparatus, and means provided for respective radio telephone sets for storing used telephone channels in response to said used office line signal.

Claim 21

The radio telephone system control apparatus according to claim 18 further comprising means for searching the contents of said memory means when the slave radio set of an originated radio telephone set does not receive an idle office line signal from the master radio set of said master apparatus in a predetermined interval after sending out said paging signal, means for displaying said idle telephone channel when an idle telephone channel is detected by said search means, and means for generating an alarm when said search means fails to detect said idle telephone channel.

Claim 22

A radio telephone system control apparatus, characterized by comprising: a plurality of radio telephone sets, each including a slave radio set; J master apparatus including a master radio set connected to at least one wired telephone channel for exchanging signals between the slave radio set of said radio telephone set and said master radio set; characterized by means for sending an origination signal to the master radio set of said master apparatus from the slave radio set of said originated radio telephone set when either one of said radio telephone sets originates; means responsive to said origination signal for detecting the state of use of a wired telephone channel connected to said master apparatus; means for sending a channel designating signal to the slave radio set of said radio telephone set from the master radio set of said master apparatus when an idle telephone channel is detected by said detecting means; means for switching a radio channel of the master radio channel of the master radio set of said master apparatus to a radio channel corresponding to a channel designating signal; means responsive to said channel designating signal for switching the radio channel of the slave radio set of said radio telephone set to a radio channel corresponding to said channel designating signal, whereby the connection control, based on the origination of either one of a plurality of radio telephone sets, between said originated radio telephone set and a wired telephone channel is effected by a single master apparatus.

Claim 23

A radio telephone system control apparatus, characterized by comprising: a plurality of radio telephone sets, each including a slave radio set; J master apparatus including a master radio set connected to at least one wired telephone channel for exchanging signals between the slave radio set of said radio telephone set and said master radio set; characterized by means for sending an origination signal to the master radio set of said master apparatus from the slave radio set of said originated radio telephone set when either one of said radio telephone sets originates; means responsive to said origination signal for detecting the state of use of a wired telephone channel connected to said master apparatus; means for sending a channel designating signal to the slave radio set of said radio telephone set from the master radio set of said master apparatus when an idle telephone channel is detected by said detecting means; means for switching a radio channel of the master radio channel of the master radio set of said master apparatus to a radio channel corresponding to a channel designating signal; means responsive to said channel designating signal for switching the radio channel of the slave radio set of said radio telephone set to a radio channel corresponding to said channel designating signal, whereby the connection control, based on the origination of either one of a plurality of radio telephone sets, between said originated radio telephone set and a wired telephone channel is effected by a single master apparatus.