CN1007117B - Extended equipment for communication system - Google Patents

Abstract

For expanding the number of subscriber lines of a communication system, the present invention establishes multichannel transmission between modules of PBX (private branch exchange) systems through the connection of a switching network and communication devices, and each of the communication devices is used as a subscriber line or a trunk line port in a module. When a dialed number does not belong to a number scheme of the module, a control unit sends calling to an idle communication device; the dialed number reaches the receiving communication device through an accessory signaling channel or a shared signaling channel between the communication devices from the original module; after being synchronized, the dialed number is used for connecting a calling terminal and a called terminal. The original small system can be expanded on spots in an effective cost mode by only using the communication devices for connecting the PBX systems, and the distances between subscribers and the systems has little influence on the system performance.

Description

Extended equipment for communication system

The put it briefly field that relates to of the present invention is the speech of simulation and numeral and the data communication of numeral, specifically a kind ofly can the user who increase newly be added to extension facility in the middle of the existing communication system in a kind of simple and reliable mode.

Design at communication system, make and operation in the middle of, an existing subject matter is the requirement that system is expanded that produces along with user's increase in PBX system that particularly defines in prior art (being the private branch exchange system system) or the PABX system (be automatic private branch exchange system system).In a series of products that company provided by this system of a lot of supplies, each the product cost effect all concrete specification with original system is relevant, and the concrete specification of original system is a function of its subscribers feeder way.

As is well known, in a communication system, such as in a telephone switching system, each subscribers feeder all is furnished with a terminal, such as subsets, and is furnished with a line circuit, this line circuit makes terminal be connected with communication network, in this manner, and when the number of subscribers feeder increases, the number of terminal and line circuit also will increase, so the total cost of system also increases.

Except this factor, another additive factor is the original center of a switching system control section, such as the conversion of storage and other function of exchange, must designed to be able to the subscriber's line way of holding a certain maximum, this maximum number may be uncertain under many circumstances, because it will become a function of user's tomorrow requirement amount.

Because, even if be not all also is that most systems all comprises the equipment that some are shared, the cost of the cost of these equipment and these road subscribers feeders all has to pay and be split on these road subscribers feeders, even this way is the minimum in its scope, for example, suppose that someone has designed a control and a switching network that holds ten road subscribers feeders, in order to realize connecting each other between ten road subscribers feeders, this network still need have the necessary control part.The cost that this system had will depend on the specification of shared control section and the number of subscribers feeder like this.Under any circumstance, if someone builds up a system that 1 hundred road subscribers feeder is arranged, same shared control section will be essential, but the additional user line number that is had will increase the cost of whole system.Therefore, the system entails of ten lines is than every line average unit cost height of 100 wire system.Therefore, generally acknowledge in the same industry that the less every line cost of lower limit of online number is higher relatively.In identical subscribers feeder, the specification complexity of corresponding shared device part and cost be basically be directly proportional and be decided by that system is increased to the ability that more massive expansion capacity promptly comprises the more users circuit.

Based on above-mentioned view, be easy to the inference cost effectiveness and a system is increased to the more upper limit of this series circuit way (example 1 ten thousand tunnel) from very little line size (example five to ten tunnel), simultaneously keeping its cost effectiveness in gamut almost is an incompatible requirement, for this given system, prior art provides a lot of schemes to attempt to solve to increase and the requirement of cost effectiveness, and prevailing scheme is that the scope to specification limits and each line is counted specification specialized designs switching system.For example, the producer of a lot of PBX and PABX equipment provides a kind of little, a kind of medium and a kind of big system, and each user will choose a kind of from three kinds of systems according to the number of required terminal.This is a kind of typical mode that a lot of producer adopts.

To the improvement of this mode is to attempt the basic fundamental and/or the standard element that keep identical, so that all products that relate to different range are kept a kind of serial thought.In itself, this means that the producer will provide a switching network and a shared control section, what this control section used is identical module, and these modules obtain from very little to bigger switching network by stack.This solution uses seldom to providing that the switching network and the medium specification switching network of subscribers feeder between 200 to 3 hundred tunnel of subscribers feeder are very suitable.Under any circumstance, even the state-of-the-art technical conceive of switching system has also shown the needs that carry out great change in system so that system can be become the network of a big specification by the network switch of a medium specification.Like this, in that system is extended to 1 ten thousand the road or the repaying in the examination of more subscribers feeder by 300, it is found that and to carry out basic change; When carrying out this transformation this basic change again then proof change and itself cause high every line average unit cost.Install on the spot in case the common restriction of the above each mode in fact is a system, then its growing ability promptly is limited in the designed upper range of this part individual product.Therefore, when a certain user has reached the saturation point of used product, must discard prevailing system and need carry out new investment, this shows will increase expenditure so that make this user can buy wider new system.

Therefore, the purpose of this invention is to provide a kind of improved switching system, this system can be extended for a high level system from a low-level system in simple and efficient mode, another object of the present invention provides equipment, this equipment will make a small-sized switching system can hold the way that subscribers feeder increases by the interface that uses special connector, this interface can provide one less from the subscribers feeder route to the higher rapid and direct extension facility of subscribers feeder way.

Fig. 1 is the generalized block diagram of PABX system, comprise speech and the data equipment of full duplex transmission simultaneously, (applying date is November 30 nineteen eighty-two, and the application people is N Carter etc. being entitled as " speech of multiple terminal source with the combination of data with separate ", application number is 448,287).A common pending application application in have a detailed description.To simply make a presentation it below.

Fig. 2 is to use connector port to carry out the simplified block diagram of the PABX system of system's expansion.

Fig. 3 is the simple block diagram of the expansion capacity of explanation module PABX system.

Fig. 4 is a description is connected a PABX switching system according to the present invention with the 2nd PABX switching system a block diagram.

Fig. 5 is the simplified block diagram according to a jockey of the present invention.

Fig. 6 describes the simple block diagram that call circuit is transformed into the device of connector.

The special technique relevant with expansion switching system that describe has special applicability for automatic private branch exchange system PABX, and this automatic private branch exchange system is described among the common pending application of above-mentioned title for " speech of multiple terminal source with the combination of data with separate ";

Referring to Fig. 1, wherein be depicted as the simple block diagram of a PABX system of the sort of type of describing in the above-mentioned patent application, this system comprises that the user to two port system provides the equipment that carries out while full duplex speech and transfer of data.The system of describing in Fig. 1 can only be the schematic diagram of a summary of this system certainly, and extended technology of the present invention is specially adapted in this system.

Comprise a complete description in the above-mentioned common pending application to this system's operation, but in order to make the application understand that a brief description to Fig. 1 is necessary below.

Referring to Fig. 1, transmission when being depicted as in the dual-port communication system speech and data.Speech and data are transported to an automatic private branch exchange system (PABX) 10 through a plurality of speeches and data terminal, and a voice terminal shown in it is subsets 12, and a shown data terminal is a data terminal 14.The information of also accepting numeral that the transmission interface circuit 20 that subsets 12 and data terminal 14 are connected among the PABX10 through two-wire subscriber's line 16 and 18, this interface circuit that is adopted are promptly accepted to simulate.

Extension 12 can comprise a phone number code-disc, the figure disc signal is connected with 18 two-wire 16 by this according to the mirage multiplex techniques, this multiplex techniques is described in the common unsettled U.S. Patent application, application number is 433, No. 335, the applying date is October 17 nineteen eighty-two, applicant F Middleton, and this application has transferred the application's assignee.

Coffret 20 can be made of a telephone line circuitry, comprise one its be designed to known CODEC and BORSCHT circuit, for example, will simulate and/or the input signal of Digital Transmission is sent to different telephone line circuitry in the digital circuit by interface.

In the system of Fig. 1, numerical data from terminal 14 on the circuit 18 is made up of the eight bit data character code of encoding according to the HDB-3 standard code of routine, the arrangement of these data can obtain the positive and negative pulse and the clock signal of system is restored, and a conventional RS-232 modulator-demodulator that is used for the terminal interface can be each end that this purpose was used alternatingly and was used to circuit 18.

The speech of appointment and numerical data are transferred to digital interface circuit 22 so that provide a duplex signaling path between digital interface 22 and digital switching network 24, the half-duplex path that provides between coffret 20 and data terminal 14 and subsets 12.In other words, can the be a kind of known mode of full duplex transmission offers PABX10 by the table tennis of being familiar with or echo cancelltion technology or by four-wire transmission line.Digital switching network 24 is the control switching network of a distribution preferably.The details of such network is described in 4,201, No. 889 patents of the U.S., and its title is " a distributed control figure switching system ", and the application people is A J LaWrence etc.; Promulgation day is the assignee who also transferred the application on May 6th, 1980.

As be disclosed in the U.S. 4, digital switching network 24 in 201, No. 889 patents couples together digital encoded data and the channel system from any one desirable user or data terminal to the digitized session of desirable user of any another one or data terminal.

Fig. 1 has shown that user 12 and data terminal 14 are by switching network 24 interconnecting to user 26 and data terminal 28, terminal interface 30 and digital interface 32 work in the mode that is entirely identical to terminal interface 20 and digital interface 22, and control circuit 34 and 36 also has disposal ability so that handle between the digital interface 22 and 32 respectively storage for subsets and data terminal.

For example, control circuit 34 can comprise that an Intel8086 microcomputer is configured for detecting off hook signal and applies ring back tone, as at 4,439 of R.Chea, described in No. 703 United States Patent (USP)s, this patent also transfers the application's assignee.

At United States Patent (USP) 4,439, comprise an audio-frequency bus in this particular system in 703, this bus is with an audio interface and circuit 33 operations take place, and this generation circuit can make common transfer of data in a plurality of users that are connected with system by audio-frequency bus.In fact, digital interface makes the people can the maintenance data cutting techniques, wherein PCM session transmissions data fields be used to hold digitized speech data and in a frame other data in the same passage, each frame all has 32 information channels here.Therefore, this system's permission data of can making peace are comprised in the common information field, and in same passage through digital switching network, a frame is a frame then, is transferred to other users of system simultaneously.

In fact, well be used to adapt to user's the most modern communication needs, because it has the ability speech and data all are transferred to different terminals as the PABX10 of first line description in Fig. 1.

Referring to Fig. 2, this system of block diagram that is depicted as whole system will be used to more detailed description operation of the present invention.

In Fig. 2, the PABX10 that is given expression in detail by Fig. 1 is actually an independently module, this module has the operated subscribers feeder 40 by PABX, can carry out contact between the different user line according to the specification of above-mentioned common pending application explanation and record to this module.As in all this systems, PABX can be connected on the telephone system of a PSN such as routine by interrupt line 41, so that arbitrary subscribers feeder can be got in touch with other subscribers feeder beyond this particular system, also have many contact devices in the present invention, circuit 42, these circuits are as illustrating, be used to the module that PABX module 10 is identical with other and couple together, comprise several times way as N subscribers feeder 40 doubly thereby system can be extended for from a system with subscribers feeder 40 of given way.

Erect image is pointed out in background of invention, for the traditional solution that overcomes extended problem to the restriction that increases and impact economically, the present invention utilizes above-mentioned switching system and allows switching system to interconnect through interconnection and other unit with similar characteristics, can make from way seldom to begin to expand, this will be in following explanation.

By this way, when needing a small-sized switching system (for example PABX10), a certain given place can be equipped with and install this module to satisfy the subscribers feeder of given way.Therefore can make system costs whole on this specification all is cost-effectively, when needs increase the more users line, the extension wire plate of process user line and interrupt line can the adding system in until its heap(ed) capacity, therefore, when user's increase in demand, as long as he appends additional cost.This is a traditional method that system is extended to its heap(ed) capacity, and when module 10 reached (or approaching) its heap(ed) capacity, second module added enter the internet so that the capabilities double of network.This has also solved the problem of space and wiring, particularly the needs of problems to causing by expanding.

For example, perhaps be the demand that satisfies a given place only two of needs or four additional PABX10 modules of as many as.Will illustrate that below module additional or that the back adds is coupled to each other by connector, this connector is designed to an intrinsic part of system construction.These connectors will allow high-throughout connecting each other between each module, thereby can increase and produce on every line basis the cost impact of minimum stably.When initial or when the specification demand had surpassed the capacity boundary of circuit specification of small-sized PABX subsequently, whole system can expand with a shared module such as PABX10, the structure of other module is identical in its structure and the system like this.By such work, just overcome the mutual direct-connected flux restriction of PABX10 module; Because each passage of each separate modular all can use its heap(ed) capacity, and suitably be communicated to needed destination module.

According to the present invention, will illustrate that below each module all is totally independent of other module together with the module that connects with it, therefore, its control unit and software do not need to introduce any equipment or database as the prior art system.

Very by this method clear, system can only need increase module and/or with the port of shared switching system system be increased stably according to the desired mode of needs that increases.New like this and old system all needn't absorb any shared equipment or program format satisfies the equipment that expands needs to constitute.

Like this, according to illustrated technology,, system allow the very wide line of scope to count specification because having this system of ability that increases and increase the on-the-spot subscribers feeder number that uses.Do not have cost impact in fact at the less end of the way of this scope, and this is just usually to the most influential scope of cost, and has only minimum cost impact for bigger circuit specification.

Referring to Fig. 3, be depicted as a master control switch 50.Master control switch 50 can be the PABX of module 10 for example, and this module is furnished with a plurality of connectors as 51 to 53.Shown in each connector all be connected to auxiliary switch (SS) as SS1 to SSN, each auxiliary switch includes suitable connector as 54,55 and 56.

Illustrated in service, this master control switch 50 as a PABX module is connected on other PABX module as SS1 arrives SSN.In service in illustrated system, master control switch 50 will receive conversation from its input connector 52, and what determine this terminal call appointment is that auxiliary switch and will repeat this process, at the connector of input with lead between the available connector of suitable auxiliary switch and set up a path, in illustrated system, desired number is transferred to connector, and this connector is transferred to it terminator terminating junctor of an auxiliary switch again.Finish conversation in this way.

As shown in Figure 3, comprise that the master control switch of a part of network can unrestrictedly expand and needn't change the database of assisting switch, assist switch to connect with master control switch 50 by connector.In the dialed number analysis process of each PABX, in case determine that dial the number does not conform to the independent numbering plan of this switch, it is the only elements that comprise the network all database that whole dialing information promptly is transferred to master control switch 50 these master control switches.In each terminaling exchange such as the SS1 inside to SSN, all conversations are all handled by conversation between line and are not had special aspect representative and expand or surmount independent control unit.

When the network specification of using no longer needs the master control switch for only needing two independent switches such as SS1 and SS2 to handle, all be suitable for same process, do not need database or shared information just can make intermodule can carry out communication in any one switch.In a Dual-switch system, the connector 56 of switch SS1 and SS2 and 55 can be directly by circuit 57 conversions, terminal among the SS1 can needn't be known the terminal that is attached to SS2 with the terminal called of SS2 not in the scope of SS1 in this case, otherwise also is the same.Connector similarly is a subscribers feeder for the switch that it inserts like this, in case what dialled is a non-existent number, switch is just received this calling on the connector, by connector it is delivered to next switch with dialing information then.Illustrated like this system needn't bear expensive can the expansion when adopting a less structure.

Because the conversation handling procedure of module can deposit in, under the non-existent situation of being dialled of indivedual conversation numbers, this conversation is just received on the effective connector like this.In such a way, this program can be used for also whether a connector is suitable in the verification system, and when connector is inapplicable, system will send an engaged signal back to the expression busy scenario to call circuit.According to the growth needs assembly connector 54,55 and 56 of system, system is in the cost of each level can remain on route lower limit reasonable range like this.This makes in lower limit circuit level needn't absorb fringe cost, and is relative minimum cost when expanding in system.

Referring to Fig. 4, wherein be depicted as one first switching system that is expressed as SS1 and be expressed as one second of the SS2 connection between the auxiliary switching system.Should point out that each switching system includes the module 10 that is shown among a PABX module such as Fig. 2.According to the present invention, digital switching network 70 and 71 is attached to SS1 and SS2 respectively, each network all have a plurality of output ports such as SS1 72 and 73 and SS2 74 and 75.Though should point out only has two ports shown in the figure, each switching network can have more than two ports, thereby more than two connector terminals.Each switching system all have a plurality of users such as SS1 76 and SS2 77.These users are those users 12 and 26 shown in Fig. 1.Following work occurs in when utilizing extended technology of the present invention.

Switching system SS1 can be installed in the three unities, and can be configured to receive for example 100 routes, when proposing the requiring of additional wire, second switching system (as SS2) is sent to this place, and as SS1, SS2 will hold 100 additional routes, and two systems will be by connector terminal separately, as 80 and 81 and 82 and 83 the linking together of SS2 of SS1.Connector is connected with 85 by transmitted in both directions passage 84.Numbering plan, promptly the subscriber directory number of SS2 is different with the number of SS1.Other unit of the control unit of switching network and switching system all enrolls program, if a number of being dialled like this is not within the numbering plan of affiliated switch, switching system is automatically connected a connector port, as the port 72 of SS1 and 73 and the port 74 and 75 of SS2.

To illustrate that as following connector comes down to be similar to the digital interface 22 and 32 among Fig. 1.A function of connector is transmission and receives dialed number so that affiliated switching network (as network 70 and 71) can be connected on the subscribers feeder that (perhaps receiving from connector port) be attached to this switch.Therefore, this just allows connection between the Any user (as user 77) of the Any user (as user 76) of SS1 and SS2.Connector also can carry out the transmitted in both directions between the user.Its operation is carried out as follows.

Suppose that the user 76 who is attached to switching system SS1 wishes to send calling to the user 77 who is attached to switching system SS2, and following a series of incidents will take place.User's 76 off-hooks, and under the control of SS1, receive dialing person, he is by user 77 regulation number dialing then, and this user belongs to SS2.The control circuit that is attached to switch identify dial the number and be not the regulation number of Any user among the SS1.Therefore, control circuit is connected connector port 72 by digital switching network 70, like this user 76 is connected on the connector 80, the control unit that is attached to this switch with dial the number and be transferred to connector 80, the connector 82 that is attached to switching system SS2 delivered to number again by connector 80.Connector 82 has received institute and has dialled the number, and to identify it by its controller be user 77 regulation number, and connecting line 82 is received on the port 74 digital switching network 71, connects with the port that is attached to user 77 again.Just had one between the user 76 and 77 like this and promptly can be used for the path that speech also can be used for data, in essence, for corresponding digital switching network such as network 70 and 71, each tie that is attached thereto all can be taken as a user.

As what proposed, the actual course of work and the transmission of speech and data all intactly are described in the above-mentioned common pending application application.This patent application has also comprised necessary structure and logic, so as each independently in the switching system (as SS1 and SS2) be connected.

Referring to Fig. 5, be depicted as the simplified block diagram of connector circuit.This circuit is expressed as connector circuit 80 to 83 in Fig. 4.As shown in FIG. 5, switching system 70 among Fig. 4 has an output port 72 that is connected on the connector port 80, connector port 80 comprises a digital interface, as the interface among Fig. 1 22, illustrated in fig. 6 as at common pending application, this interface can decompose simulation and numerical data, and other signals such as synchronizing signal can be provided to switching network.The digital interface place indicates that the reception of RX and TX is connected with a pcm interface 65 with transmission.This interface comprises a transmission and receives buffer amplifier, and the isolating transformer to reception and the response of transmission data.

The output of pcm interface 65 promptly receives and transmission line, is connected to a synchronizing signal and injects and selected circuit 60, and in fact, this circuit receives the PCM signal, and signal is become synchronizing signal, and carries out separated in synchronization and processing.The module 60 that is marked among Fig. 5 and 65 and common pending application Fig. 6 shown in module 300,310,320 and 308 similar.The purposes of module 60 is to make from pcm interface 65 to receive the data syncization of coming.Then with data separating, so that the control interface 61 of dialling the number and entering processor and be attached to module 60 from the institute that switching network 70 transmission come.Local control logic 329 shown in Figure 6 and parts 322,328 are identical with 330 function in the function that this processor and control interface 61 are finished and the common pending application.Processor control interface 61 links to each other with processor controls 68, and the processor 34 among the latter and Fig. 1 is similar.Control unit is transferred to control interface and synchronous and signaling module 60 through processor again with its whole number of storing then.

Be appreciated that at parts 60,61,65 and the square frame of 80 li of digital interfaces between the repetition of function can appear, this does not influence overall operation; And for clear, these functional parts are expressed as 60,61,65 respectively.In fact in order to save, entire circuit can be simplified, yet as shown in Figure 5, connector is a separate unit that connects as user terminal.

Now, by control unit transmission dial the number and be admitted to the transmission line of transmission line interface 62.This transmission line interface 62 is similar with the operation of pcm interface 65, and thus dial the number is transmitted along transmission line.In another place, the transmission line TX of transmission line interface 62 is connected to the reception line of RX line or attached transmission line interface.Then, dial the number be admitted to distant-end switch synchronously and the reception terminal of injection circuit 60, in distant-end switch, pass through the control unit 68 that processor and control interface 61 are transferred to signal distant-end switch; Each assembly all is contained in the distant-end switch.The control unit 68 of distant-end switch identifies the effective number that this number is a distant-end switch immediately.Therefore, the control unit 60 that illustrates in common pending application will be connected this switching network by digital interface now, be exactly to make the tie port receive a user on the suitable subscriber's line as it.Certainly, must be clear and definite for all mentioned parts, and function and operation all clearly are described among the common pending application.

According to above narration, as long as relate to local switching system, the user terminal that each connector promptly is used as a reality connects; Therefore when one when dialling the number that the Be Controlled unit is not identified as assigned number, control system will be connected to calling terminal on the connector, then this number just is transferred on the distal connector; This connector also occurs as subscribers feeder.Signal between (PBX's) routing node can mechanism's attached channels be handled by the letter of the simply connected wiring that is used for low telephone traffic; Also can handle by the mechanism of the shared channel signaling that is used for multichannel tie or high speed communication.Distal connector will transmit the number that comes and very exist in the memory, require attached switching network work; This network is connected tie and appropriate users line.Form the connection fully between a call circuit and the called line like this.

Therefore can affirm that the expansion of module PABX utilizes this connector circuit to carry out easily, said system is specially adapted to the switching system that illustrates in the above-mentioned common pending application.

Should be noted that between any auxiliary switch or one auxiliary and master control switch between actual range be arbitrarily, be not subjected to the restriction of any specific range.

In fact, digital switching network is the control switching network of distributivity, and it operates in United States Patent (USP) 4,201, is illustrated among No. 889; This patent promulgation day is on May 6th, 1980, and the application people is people such as A J LaWrence, and title is " a distributed control switching network ".

Can determine that by this patent switching system comprises the TSU terminal subunit shown in Fig. 1 of this patent.Each TSU terminal subunit comprises two groups of processors.First group of processor be used to operate a component from terminal or be called the port of terminal group; And carry out one group of specific processing capacity as setting up passage by the group switch.

Operating in 4,201, No. 889 patents of the U.S. of entire switching network network gives very detailed explanation.Referring to Fig. 6, at least for above-mentioned extended technology how to move to provide one briefly bright, the whole number that sends from a user (as the user Fig. 1 12) is transferred in the A processor 90, and this processor is similar to the A processor shown in the above-mentioned patent.As described, this processor comprises a memory, and this memory is a transducer and has stored the call number or the equipment number of each terminal that is connected with switch.In other words, this processor can be got in touch with an auxiliary processor, and the latter comprises the number of these storages, so that verify whether called number can be in the switch internal switching.Microprocessor 90 stores called-number, and transducer 91 scanned with the correspondence that determines whether this number number determines that with this called line is whether in switch.If there be not corresponding number.And dial and be a significant number, then microprocessor is transferred to module 93 with dialling the number via line 92, this module is a connector connecting circuit.Expression does not find that corresponding number signal is applied on the circuit 94, the connector connecting circuit can be a shift register or another microprocessor, and its effect is that link tester that generation is dialled the number is crossed to be communicated with hunting switch 95 and is connected on the idle connector.Can see from above-mentioned patent, hunting switch 95 is connected with the group switch, and links digital switching network, therefore constitutes to connect between call circuit and connector.

Connector connecting circuit 93 also has the input 96 that other connector comes from switching system, shows that they are idle or take.Certainly, realize that above-mentioned technology has a lot of modes, but will propose above-described patent especially so that how the digital switching network 24 that people understand among Fig. 1 works, the detailed description of being done in the above-mentioned patent of erect image is the same.

In case connected connector circuit through hunting switch and group interchanger, the output of this connector circuit also is switched among the input of the interconnection circuit that is positioned at distant-end switch.This connector receives institute from output interconnection circuit and dials the number, and erect image is pointed, and each connector shows as a terminal use for switching system.Distal connector requires operation and is connected in another switch by the specified terminal of call number by this distal connector.Like this, utilize corresponding connector circuit to finish connection between two subscribers feeders to carry out and can finish transmitted in both directions.

Another advantage that can use with the present invention is that the common-use tunnel signaling can be used between the auxiliary system.Here, path between the connector is assumed that and comprises multiple data speech channel capacity, as with reference to the PCM path of switch, one of these passages can be between connector by a kind of be that known mode delivers signaling information for other sound in the path or data channel.Like this, for each switch, each connector all will occur as one group of user.

Claims (13)

1, by one the 2nd PBX switching system being joined the equipment of one the one PBX switching system with the subscribers feeder capacity of increase communication system system; Each said system comprises a multiple port number switching network, above-mentioned first system has first port of a given number, each above-mentioned first port all has a coding number separation and independent, above-mentioned second system has second port of a given number, each above-mentioned second port all has different with any above-mentioned first port and is independent coding number, and above-mentioned first and second ports can be by stirring the another port in above-mentioned each said system of coding number call that is attached to the another port; The said equipment makes any first port all can call out any second port, and control device (68) that is attached to each above-mentioned first and second switching network, whether the coding number that its operation can detect a port dial-out from above-mentioned network is the coding number that is suitable in this switching network with definite this number, and provides an output signal when the dial the number coding number that is not suitable in this switching network;

It is characterized in that:

At least one first jockey (56) is connected on the port of above-mentioned first digital switching network, and at least one second jockey (55) is connected on the port of above-mentioned second digital switching network, and above-mentioned first and second jockeys link together to provide one from above-mentioned first bidirectional transmission path to above-mentioned second switching network; And above-mentioned output signal reacted the device that above-mentioned dialing port is connected with the above-mentioned jockey of this switching network; Above-mentioned jockey comprises storage and transmits above-mentioned device of dialling the number deposited number is transferred to above-mentioned another jockey that is attached to above-mentioned another switching network; Thus, above-mentioned another switching network is dialled the number to above-mentioned institute and is reacted, and above-mentioned the above-mentioned of above-mentioned another switching network of dial peer slogan that is connected switching network connected by the dialing port.

2, according to the equipment of claim 1, wherein each jockey comprises a memory that is attached to above-mentioned processor, during operation the above-mentioned coding number of dialling is deposited in the above-mentioned memory.

3, according to the equipment of claim 1, the above-mentioned input of wherein above-mentioned first jockey is connected to an output port of above-mentioned first switching system.

4, according to the equipment of claim 1, the above-mentioned input of wherein above-mentioned second jockey is connected to an output port of above-mentioned second switching system.

5, according to the equipment of claim 1, wherein above-mentioned first and second switching systems are data and voice communication switching system.

6, according to the equipment of claim 1, wherein each switching system all has similar structure.

7,, comprise the user terminal that is connected with selected above-mentioned port in addition according to the equipment of claim 1.

8,, comprise a plurality of jockeys that are connected with a plurality of ports in addition according to the equipment of claim 1.

9, a kind of one the one PBX switching system is connected with one the 2nd PBX switching system,, may further comprise the steps so that increase the method for the whole subscribers feeder capacity of switching system:

Through first port that is attached to the switching network of an above-mentioned PBX system above-mentioned first and second switching systems are linked together, a PBX system is connected on one second port of above-mentioned the 2nd PBX system,

The coding number of specifying one first series for above-mentioned first system, and specify the different coding number of a cover for above-mentioned second system, wherein each coding number is represented each port of above-mentioned corresponding switching system,

Whether monitoring belongs to a port in the same system by calling out all coding numbers that port produces in each system to determine this number,

The called-number of any port that does not belong to above-mentioned first system that sends in above-mentioned first system is connected to above-mentioned first port by above-mentioned calling port,

The called-number of any port that does not belong to above-mentioned second system that sends in above-mentioned second system is connected to above-mentioned second port by above-mentioned calling port; Wherein the step that above-mentioned first and second switching systems are linked together is included in connector circuit of above-mentioned first port arrangement (this connector circuit has the memory of an above-mentioned call number of storage) and at above-mentioned second port of above-mentioned switching network a similar connector circuit is installed, and above-mentioned connector circuit coupled together, so that can carry out transmitted in both directions between above-mentioned first and second ports.

10, method according to claim 9, wherein above-mentioned first and second systems are data and speech switching system.

11, according to the method for claim 9, wherein above-mentioned first and second ports are output ports of above-mentioned switching system.

12, according to the method for claim 9, wherein finish by a common-use tunnel device by the signaling between the interconnective switching system of connector, this lane device be used for all other be present in the communication of two-way signaling information of the connector of this communication line.

13, according to the equipment of claim 1, wherein above-mentioned connector comprises the multiplexor capacity, and the multiple call between the above-mentioned network is produced on an entity line.

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