CN1032274A - Secondary dialling method within acoustic frequency band - Google Patents

Abstract

A kind of cable telephone network of realizing is to secondary dialling method within acoustic frequency band between the radiotelephony network.Use a kind of telephone set with pulse, two kinds of dial mode compatibilities of audio frequency, dialing for the first time is pulsed, and dialing for the second time is the audio frequency formula.Make in this way, only need a pair of subscribers feeder can form the wire/wireless automatic dialing system, the networking expense is low.Use this method can realize that local telephone network, toll telephone enter wireless network, for wired long-distance full-automatic exchange provides a kind of new method.

Description

Secondary dialling method within acoustic frequency band

The invention belongs to communication field, further belong to the full-automatic tandem technology 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 being arranged so far, a kind of is the trunk line access way, and 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 that when local telephone network was called out travelling carriage, if the trunk line that does not have to transmit number 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; 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 in the subscribers feeder access way, adopted, only need a pair of subscribers feeder, just can realize the automatic dialing of telephone, but this method is relevant with the type of switch radio mobile station, and unreliable, its application is restricted.

The objective of the invention is for any switch, only need a pair of subscribers feeder,, just can realize telephone any one wireless telephonic automatic dialing in wireless network as long as adopt secondary dialling method within acoustic frequency band.

Another object of the present invention is to provide a kind of new method 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 means of communication 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, if well-behaved platform number divides platform that ring promptly takes place, can set up conversation behind person on duty's off-hook.

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.This is very useful for the low capacity system.

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

Accompanying drawing one is the electrical schematic diagram of one embodiment of the present of invention.

[1] is the HA-031 telephone set among the figure, and [2] are telephone exchange, and subscribers feeder ringing detector circuit has been formed in [3] [4], [5], [6], [7], and [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.[9], the subscribers feeder automatic take offing machine circuit has been formed in [10], [11], [12], [13], [14].[15] the 2/4 line converter of using for ordinary telephone set, [16] by 8253 tone generators of forming, [17] are duplexing radio station, and [18] are antennas, and [19], [20] they all are the subscribers feeders of switch [2] ,+V ₁With+V ₂Be 5V and 60V DC power supply.

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 [9] immediately for immediately [8] low levels of input [8], [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 (2)

1, secondary dialling method within acoustic frequency band during the full-automatic tandem of a kind of wire communication net and wireless telecommunications net is primarily characterized in that by telephone set [1]; Telephone exchange [2]; [3], the subscribers feeder formed of [4], [5], [6], [7] the official seal detector circuit that shakes; Single-chip microcomputer or single board computer [8]; And the subscribers feeder automatic take offing machine circuit is formed in [9], [10], [11], [12], [13], [14]; 2/4 line converter [15]; Tone generator [16]; Duplex radio station [17]; Antenna realizations such as [18], dialling for the first time when using is the pulse mode dialing, dialing for the second time is the voice-frequency dialing mode of 300-3400HZ.

2, according to claim 1, the employed telephone set of two-stage dialing method [1] is the telephone set of pulse, two kinds of dial mode compatibilities of audio frequency.