CN1019442B - Secondary dialling method within acoustic frequency band - Google Patents

Abstract

The present invention relates to a method for realizing secondary dialing within an audio band between a wired telephone network and a wireless telephone network. A telephone with a pulse dialing mode and an audio dialing mode is used; the primary dialing mode is pulse type, and the secondary dialing mode is audio. The method can form a wired/wireless automatic dialing system only by a pair of user lines; the network establishment fee is low. The method can realize that unbar telephones and long distance telephones enter a wireless network. The present invention provides a new method for wired, long-distance and fully automatic switching.

Description

Secondary dialling method within acoustic frequency band

The invention belongs to communication field, further belong to the interior two-stage dialing system of full-automatic tandem technology middle pitch frequency band of wire communication net and wireless telecommunications net.

In the communication system of wire/wireless switching, in order to realize from the automatic dialing in wire telephone each radio station to wireless network, two kinds of interface modes are arranged so far, a kind of is the trunk line access way, another kind is the subscribers feeder access way, or trunk line access way and subscribers feeder access way compatibility.The AMTS-5 type wire/wireless automatic dialing system that Shijiazhuang Sino-U.S. nova computer Co., Ltd produces just has been to use the trunk line access way.The shortcoming of this mode is, when local telephone network was called out travelling carriage, if the trunk line of the number that do not have to transfer automatically cooperates, it was full-automatic just can not to constitute trunk line.In other words, use the user of local telephone network to want to realize automatic dialing to wireless network, a pair of out-trunk must be arranged, and local telephone network out-trunk rent is very high, 8000 yuan of installation fees, every charge per month are also very high, in general, have only those units that automatic switch-board (subscriber exchange) arranged, just have ready conditions and use this system.This has just limited promoting the use of of this mode.What gondola RTR-102 type rural telephone system system and PANASONIC SMTS small capacity mobile telephone system adopted is the subscribers feeder access way, and what " executor's II number " mobile station system that U.S. GE company produces adopted is trunk line access way and subscribers feeder access way compatibility.Their common feature is: subscribers feeder and travelling carriage are one to one, that is to say, the quantity of travelling carriage equates with the subscribers feeder quantity that is inserted.Therefore, its shortcoming is to take the more subscribers feeder of local telephone network (or Private Branch Exchange PBX), certainly will increase the networking expense, for example Japanese 8 channel systems, about 1,560,000 yuan of networking expense.Under the present also underdeveloped condition of China's telephonic communication, promote the use of more difficult.The another kind of pulse two-stage dialing method (CN86209064U) that adopted in the subscribers feeder access way only needs a pair of subscribers feeder, just can realize the automatic dialing of telephone to radio mobile station.But this method is relevant with the type of switch, and unreliable, and its application is restricted.

Only finish cable telephone network and dial automatically, relate to the problem of " two-stage dialing " to radiotelephony network by subscribers feeder.Promptly dialing makes telephone set put through the subscribers feeder that the radiotelephony network central control board is connect for the first time, and telephone set is dialled required air station in the radiotelephony network for the second time more then.When adopting the pulsed switch, because for the first time after the dialing, speech channel is set up in the cable telephone network, speech bandwidth is 300-3400HZ, and the fundamental frequency of pulse dialing for the second time is about 10HZ, obviously outside the speech band, be difficult in speech channel, transmit, and the level of pulse dialing for the second time just changes might make switch be judged as on-hook, thereby speech channel is taken out stitches, and dialing for the second time can't be finished the insecure reason of this two-stage dialing of CN86209064U pulse just.

The objective of the invention is for any switch, only need a pair of subscribers feeder, only need to adopt two-stage dialing system in the voiced band, just can realize telephone any one wireless telephonic automatic dialing in wireless network.

Another object of the present invention is to provide a kind of new system for wired long-distance full-automatic exchange.

A further object of the present invention is on the basis of the existing communication apparatus of China, to provide a kind of networking expense low, the new communication system of being convenient to promote.

The telephone set that cable telephone network of the present invention is made a phone call to radiotelephony network must be the telephone set of pulse/voice-frequency dialing compatibility.If the arbitrary telephone set in the wired network is dialled wireless network, at first use the first appropriation of traditional pulse dialing family wire size sign indicating number, switch is to this subscribers feeder ring, ringing detector detects ring back tone, make this subscribers feeder present off hook state immediately, so subscribers feeder and telephone set speech channel are logical, synchronous signal sound circuit send dialing tone (being secondary dial tone) to telephone set immediately.Wire telephone is heard secondary dial tone, promptly uses the voice-frequency dialing method instead, dials the branch platform number in the wireless network.Divide platform As-received voice-frequency dialing that platform is sent and the number of oneself to compare in the wireless network,, can set up conversation behind person on duty's off-hook if well-behaved platform number divides platform that ring promptly takes place.

Major advantage of the present invention do not need to be out-trunk can form the wire/wireless automatic dialing system, and the networking expense is low.

Another advantage of the present invention is to use the compatible phone of pulse/voice-frequency dialing, can control wire user quantity, avoids subscribers feeder and wireless channel telephone traffic excessive, percent of call lost height, and this is very useful for the low capacity system.

Further advantages of the present invention are a pair of subscribers feeders, and a radio channel is simple, cost is low, is convenient to promote, and is fit to China's national situation.Use the present invention can realize that local telephone network, toll telephone enter wireless network.

Accompanying drawing 1 is an electrical schematic diagram of the present invention.

(1) in the accompanying drawing 1 is a HA-031 type telephone set, (2) be telephone exchange, (3), (4), (5), (6), (7) have formed subscribers feeder ringing detector circuit, (6), (12) are for photoelectrical coupler plays buffer action, make wired network and wireless network not altogether " ".(8) be single-chip microcomputer or single board computer, control the tandem process of telephone and radiotelephony network automatically.The positive pole of capacitor (3) connects subscribers feeder (19), negative pole and voltage-stabiliser tube (4), resistance (5) series connection are to the input of photoelectrical coupler (6), load resistance is passed through in the output of coupler (6), (7) meet power supply+V1, an I/O mouth A of the output order sheet microcomputer (8) of coupler (6).(9), the subscribers feeder automatic take offing machine circuit has been formed in (10), (11), (12), (13), (14).Be connected a simulation off-hook resistance (10) between the emitting stage of triode (9) and the ground, its base stage is connected with photoelectrical coupler (12), the load resistance (13) of photoelectrical coupler (12) is connected between power supply+V2 and the coupler (12), resistance (11) is connected between the base stage and ground of triode (9), and coupling, current-limiting resistance (14) are serially connected in an I/O mouth B of coupler (12) and single chip microcomputer (8).(15) the 2/4 line converter of using for ordinary telephone set, two line ends of converter (15) are connected in parallel on the resistance (10).(16) by 8253 tone generators of forming, (17) are duplexing radio station, and (18) are antennas, and (19), (20) all are the subscribers feeders of switch (2) ,+V1 and+V2 is 5 volts and 60 volts of DC power supply.Subscribers feeder (20) is connected in series telephone set (1) and pulse dialing method switch (2), duplex radio station (17) is serially connected between 2/4 line converter (15) and the antenna (18), telephone set (1) is the telephone set of pulse, two kinds of dial mode compatibilities of audio frequency, and subscribers feeder (19) is serially connected with a subscribers feeder ringing detector circuit I/O mouth A of switch (2) and single chip microcomputer (8).A subscribers feeder automatic take offing machine circuit is serially connected with an I/O mouth B of switch (2) and single chip microcomputer (8) through subscribers feeder (19).An I/O mouth C of single chip microcomputer (8) links to each other with tone generator (16), and the output of tone generator (16) connects 2/4 line converter (15), and converter (15) converts audio frequency four lines of duplexing radio station (17) to the two wires of phone.

Its operation principle is such, (1) behind the off-hook, earlier dial the subscribers feeder number of (19) with pulse dialing method, switch (2) is just to (19) ring, (3), (4), (5), (6), (7) ring detecting circuit of Zu Chenging detects the bell signal that switch (2) comes, give (8) input a low level immediately, (8) give (9) immediately, (10), (11), (12), (13), (14) automatic take offing machine circuit of Zu Chenging send high level, and send high level for tone generator (16), so triode (9) conducting, resistor (10) is received on the subscribers feeder (19), equivalence is subscribers feeder (a 19) off-hook, and (2) stop paying out ring.(20) connect with (19) speech channel, (16) send secondary dial tone.Through 2/4 line converter (15), triode (9), subscribers feeder (19), switch (2), subscribers feeder (20) arrives telephone set (1).(1) use the voice-frequency dialing mode again instead, dial the number of required radio station, the audio number code frequency after duplexing radio station (17) is modulated in (20), (2), (19), (9), (15), is launched from antenna (18) in voice band.In this two-stage dialing process, the speech channel of (20), (2), (19) can be not destroyed.

Claims (3)

1, two-stage dialing system in a kind of voiced band, it comprises that subscribers feeder (20) is connected in series telephone set (1) and pulse dialing method switch (2), duplex radio station (17) is serially connected between 2/4 line converter (15) and the antenna (18), it is characterized in that: described telephone set (1) is the telephone set of pulse, two kinds of dial mode compatibilities of audio frequency; Subscribers feeder (19) is serially connected with a subscribers feeder ring detecting circuit I/O mouth A of described switch (2) and single chip microcomputer (8); A subscribers feeder automatic take offing machine circuit is serially connected with an I/O mouth B of described switch (2) and described single chip microcomputer (8) through described subscribers feeder (19); An I/O mouth C of described single chip microcomputer (8) links to each other with tone generator (16), and the output of tone generator (16) connects 2/4 line converter (15), and converter (15) converts audio frequency four lines of duplexing radio station (17) to the two wires of phone.

2, two-stage dialing system in the voiced band as claimed in claim 1, it is characterized in that: the positive pole of the capacitor (3) in the described subscribers feeder ring detecting circuit connects subscribers feeder (19), negative pole and voltage-stabiliser tube (4), resistance (5) series connection are to the input of photoelectrical coupler (6), the output of coupler (6) meets power supply+V1 by load resistance (7), and the output of described coupler (6) meets an I/O mouth A of described single chip microcomputer (8).

3, two-stage dialing system in the voiced band as claimed in claim 1, it is characterized in that: be connected a simulation off-hook resistance (10) between the emitter of the triode in the subscribers feeder automatic take offing machine circuit (9) and the ground, its base stage is connected with photoelectrical coupler (12), the load resistance (13) of photoelectrical coupler (12) is connected between power supply+V2 and the coupler (12), resistance (11) is connected between the base stage and ground of described triode (9), coupling, current limliting electricity limit (14) is serially connected in an I/O mouth B of coupler (12) and described single chip microcomputer (8), and two line ends of described converter (15) are connected in parallel on the resistance (10).

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