JPS59114953A - Connection processing system - Google Patents

Abstract

PURPOSE:To attain the smooth switching with a simple connection processing by connecting the call switch connection to a desired terminal via a folded loop circuit when a call of a busy mode has talking with a third party. CONSTITUTION:Telephones A and B stored in digital switch modules SM1 and SM2 are connected each other via a connection line 1. Then a telephone C gives a call to the telephone A via a connection line 2 in a busy mode of the A. Thus the C is switched to a call waiting mode and connected to a folded loop circuit LT by the module SM1. Then a folded terminal of the circuit LT is connected to the telephone B and a 3-way trunk TWT respectively. Then the telephone A is connected to the telephone C via the line 2 after knowing a call incoming under communication and performing the hooking. Thus the talking is possible with the telephone A. While a waiting sound HST is connected to the telephone B via the line 1 and the circuit LT. Then the telephone A has hooking again after the talking is through with the telephone C, and the telephone A can have talking again with the telephone A.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a connection processing system, and more particularly, to a connection processing system for six subscriber telephones for call waiting services in a distributed time division switch. do.

Technology Background Digital switches that accommodate multiple terminals
comprising a communication path network device composed of a plurality of modules, and a call processor that individually controls the eye digital switch module for each of the digital switch modules, - corresponds to the call processor; In a distributed control digital switching system that controls digital switch modules and performs connection processing such as setting up call routes, the terminals (telephones or lines) to be connected belong to different digital switch modules and , for connection control, if two call processors corresponding to different digital switch modules have to participate in the connection control of one call,
A patent application filed in 1982 describes a digital communication network control system using a virtual terminal circuit, in which each digital switch/electronic module is controlled by a corresponding call processor as if it were a communication network of an independent exchange, and a connection route is set. 92659
It is proposed by No. With this method, the connection process between the two terminals as described above has become simple and easy. However, in the above-mentioned distributed control type time-division switching system, connecting a third subscriber telephone to provide a new service such as call waiting to two subscriber telephones that are in a call state is difficult. Processing becomes complicated,
It was impossible to do this easily and with a simple process.

K-terminal technology and problems Figure 1 shows a digital terminal system that accommodates multiple terminals.
A communication path network device consisting of a plurality of switch modules, and for each of the digital switches 7 Joules,
SKl, SJb, SMB in an exemplary configuration of a distributed control type time division switch comprising a call processor that individually controls the digital switch module.
are digital switch modules, and these constitute the communication path network equipment of the time division switch. CPR
,,CPR,,CPR.

is a digital switch module SM, , 5
M2.

The call processors individually control the SMs, respectively, and are connected to a common main processor MPR via a common bus CB.

A, E, and C are examples of telephones accommodated in the above-mentioned communication path network equipment, LC + L'B HLC (3 is each subscriber circuit, and converts the 2-wire signal on the telephone side into a 4-wire system. Telephones A and B are converted and connected to an exchange.

It digitizes (encodes) the audio signal sent from C and sends it to multiplexer MPX1, etc., and converts (decodes) the digital signal sent from demultiplexer I) MPXs, etc. into an analog audio signal and makes a telephone call. eA, B
, C, etc.

Digital switch module SK1.5M2.

In SM, MPX1 to MPX are multiplexers that time-division multiplex the digitized call signals from the telephones, DMPX, to DMPXs are demultiplexers that divide the time-division multiplexed call signals to each telephone, and FT
Sl-FTSs are forward time switches, BTSs,
~BTS, ID, backward time switch, which swaps the time slot of the call signal, FHW
.

~FEW, is Forward Norway, EHW1~
EHW.

is a backward time switch, SSF is a space switch, and a forward time switch FT S
l” FT S s intermediate λ no 1 way IH
W,-IHW6 is accommodated, and this means that the intermediate IH
WI to III's are all connected through gates G (when the word is turned...) switches BT51 to ETS,
(for intermediate input to)・equei IHWI' to lHF6'
It is connected to the. This space switch SSF performs interchanging of speech signals.

CMI~CMm are forward time switches FT51~
FTSa and backward time switch BTS,~E
The control memories GCM and -GCM that control TSa are gate control memories that control the gate G of the space switch 5srr.

This communication network equipment has a single stage forward time switch (
FTS, -FTS6) and single stage space switch (SSW)
and one stage backward time switch (ETSl-ETS
e) is the T-5-T configuration.

As already explained, call processor CPR1rC
PRz and CPRs are the corresponding digital
It controls the switch modules SM1, 5M2, SMs, and the main processor MPR also controls all call processors (cpx, .about.cpRs).

Now, for example, when telephone A makes a call and receives a call from telephone B, which is housed in a digital switch module SN that is different from the digital switch module SM where telephone A is housed, the connection is as follows. You can do it like this.

When telephone A makes a call, the call processor CPR, which controls the digital switch module S) in which telephone A is accommodated, detects this, obtains the accommodation location information, and transfers this information to the common bus CE. to the main processor MPH.

The main processor MPH is provided with a memory having an area for storing subscriber data, including telephone number information, accommodation location information, and class information for all subscribers.

Subscriber information including occupancy information etc. is stored, and also has a time slot occupancy management table, and intermediate highways (IIIg', ~I
The time slot vacancy information of HW, , IHWI' to lHF6') is included, which allows the digital switch module SK1.5M2, SM
B Manage connections between each other.

Now, when the main processor MPR receives the accommodation position information of the calling telephone A and the accommodation switch module number 16, it performs class identification and determination as to whether it is occupied or blocked, and if it is a wall, it inputs blockage information of 1. The call processor CPR further detects the dialing information sent by the calling telephone A (in this case, the telephone number information of the telephone B) and sends this dialing information to the main processor MPH via the common bus CE.

The main processor MPR converts the dial information into accommodation digital switch module number information and accommodation location information. In this way, the accommodation digital switch module number information and accommodation position information of both the originating and receiving telephones 'tB are obtained, and based on this ↑H information, the spatial switch S
Select a pair of vacant time slots that can be connected between both digital switch modules in the SF, and connect the digital switch module 5x1t" that houses the master processor This pair of time slot information is sent to the CPRH, and the same pair of time slot information is sent to the call processor CPIh that controls the digital switch module SUZ in which the receiving telephone board B is accommodated. and sends the accommodation location information of the incoming telephone PAE.

Based on the transferred information, the call processors CPR and CPRz respectively control the control memories Chh and 0M3 as well as the gate control memories GCM and GeH4.
Write control information to the forward time switch FTSl + backward time switch IBTS.
, and forward time switch FTSse backward time switch ETS, and space switch SSW
Goo) G1. and G81. In this case, each call processor CPR, CPR2 has its own controlling digital switch module sx1.

The SNs are controlled as if they were independent stations, with no relation to each other.

In this case, the speech signal transmitted from the telephone mA is transferred from the subscriber circuit LCA to the digital switch module SN.
Multi-Flexa MPX1.7 Orward High Uniil HF11 Forward Time Switch FT51
3', backward time switch BTS3, backward highway BHW's demultiplexer DMPXs + subscriber circuit LCB to telephone @H. 'The call signal from telephone B to A is sent similarly, but via the gate GIS.

In this case, the call processors CPIh, CPRz and the main controller are used to change the connection path (time slot of the highway input/output to/from the space switch SEF) between the telephones A and B selected as described above. Since the processor MPR has to operate in the same way as when it was connected again, the connection process is complicated9 and takes time, and it is difficult to perform the switching smoothly.

Figure 2 shows the connection of call waiting in a general single processor control system in a communication network device configured by connecting a plurality of digital switch modules (SX, etc.) as shown in Figure 1. It is a figure showing a processing process. Figure 2! (α) is different digital
Switch module SM, .

The first telephone A and the second telephone B housed in the SM
This shows that the terminal and terminal are connected through the connection path ■ and a normal telephone conversation is being carried out. Figure 2(b) shows the first and second
The digital switch modules SMl and SMg that house telephones & A and B are
The first telephone A is currently talking to the second telephone B from the sixth telephone C housed in the switch module SN.
When there is stratification and call waiting service is provided, telephone C connects to the normal connection route @Yoshiryuwa8t
When A receives a call and Phone & C encounters Phone A busy,
Switching to the call waiting service, with connections ■ and ■ on hold (indicated by dotted lines), connect paths ■ and ■ shown by solid lines are set up, and telephones A and B are connected to either digital Switch to each of the two input ends of the three-way trunk TWT connected to the switch module Sun, and the other one input @display sound 1
Connect 1T. Telephones mA and B can communicate via a three-way trunk TIT, and 10 telephones A receives an incoming call indicator tone 11T, while telephone C receives a ring tone RB.
T is sent.

6th party in call waiting service
A call is currently being received. Note that the three-way trunk TWT may be installed in any digital switch module, and of course, it can be installed in the digital switch modules SM1.5M2 and 5M311C.

When the user hears the incoming call signal 11T at the root A and performs hooking, the state shown in FIG. 2(C) is reached. Telephone A goes from connecting route ■ to ■, and telephone B goes from connecting route ■ to H5 in front of the waiting room.
At T, telephone C is switched from ring tone RBT to connection path ■, telephones A and C can talk, and telephone @B
is in a waiting state.

If the processing by the single-processor control method as shown in FIG. 2 above is applied to a multi-processor control method time-sharing switch to which the present invention is applied according to the conventional technology, the following results can be obtained. 2nd and 6th telephones A, B, C
If these are housed in different digital switch modules controlled by separate call processors, the following disadvantages arise:

That is, in the state of a two-party conversation between the first and second telephones A and B shown in FIG. In order to perform the service, the state shown in Fig. 2 (6) must be established, and at this time, telephone A connects from the connection path ■ between telephones A and B to the connection path ■ to the three-way trunk TWT, and Telephone □It is also necessary to change the connection from the connection path ■ between telephones A and B to the connection path ■ to the three-way trunk Tll'T.For this connection change, as described above, A digital switch module Shh accommodating multiple call processors, in the above case phone @A and phone B respectively
*The process of switching connections, which requires the coordination of the two call processors CPR1 and CPR2 for SM2 and the main processor MPH, is time consuming and smooth. There was a problem in which instantaneous interruptions occurred due to difficulty in determining if. It should be noted that even with distributed control using a multi-processor system, the above-mentioned problem could not be solved with conventional technology.

OBJECTS OF THE INVENTION The present invention provides a digital
A distributed control type time division system comprising a communication path network device consisting of a plurality of switch modules, and a call processor for individually controlling each digital switch module. When switching between a telephone and a connection path in a call waiting service, etc. in a switchboard, it is possible to perform control using only one call processor, solving the above-mentioned problems with conventional technology, and simplifying connection processing. The purpose is to enable smooth switching.

Embodiment of the Invention FIG. 6 is a diagram showing the connection process in an example in which the connection processing method according to the present invention is implemented for the call waiting service of the distributed control type time division exchange as shown in FIG.

FIG. 6(α) shows that first and second telephones A and B housed in different digital switch modules Skh and SHz are connected to each other by a connection path ■ passing through a wall switch 5srv. This is a reproduction of FIG. 2 (α), showing a state in which a telephone call is being made.

FIG. 3(b) shows a digital switch module SKI in which the first and second telephones A and H are accommodated.

Digital switch module S different from 5M2
The sixth telephone set housed in the first telephone &jK layer Igiashi, which is making a call to the telephone DB from the sixth telephone C housed in M, indicates the gift of providing call waiting service. When C receives a call from stain removal machine A through the normal connection route ■ and encounters that telephone A is busy, the call is switched to call waiting, and the connection routes @, ■, and ■ are newly set, and At the digital switch module SN, under the control of its call processor CPR1, the connection path ■ is reconnected to the return terminal 1 connected from the telephone A to the return loop circuit LT, and the other end of the connection path ■ Telephone B is connected to connection path ■, return terminal 1 of digital switch module SM, and connection path ■''f is also 2.
: to one input end of a three-way trunk TWT provided in any digital switch module.

Therefore, the packing machine A is switched from the connection path ■ to the connection path ■ in the digital switch module SN under the control of the call processor CPR1, and is connected to the other input of the three-way trunk TWT via the connection path ■. connected to the end. It should be noted that a layer signal display sound KIT is connected to yet another input end of the three-way trunk rrr. In this state, similar to the state shown in Fig. 2(b), it is possible to talk to telephones A and B via the three-way trunk, and the first telephone A has an incoming call display. Tone 11T is sent, while the sixth telephone C is sent a ring tone RBT. In other words, it indicates that a call is being received from a sixth party in the call waiting service.

In the present invention, during the two-way loading shown in FIG. 6(cL),
From the state shown in the same figure (b), the call waiting
When the service enters the state of plagiarism by a third party, there is no change in the digital switch module SM2 housing the other party's telephone, that is, the second telephone B, and the call controlling it remains unchanged.・Processor CPR2
doesn't work at all.

The above processing operation will be explained in more detail with reference to FIG.

In the state shown in FIG. 6(α), as already explained, the speech signal sent from telephone A is converted into 2-4 wires and digitally encoded (encoded) in the subscriber circuit LC. , multiplexer MPX1 . of digital switch module 5Jfl. Forward Highway F
HWl, 7-o-one word time switch pTsl + intermediate highway IHW, , gate G of space switch SSW
31, furthermore, the space switch SSW and the intermediate output IHW of the digital switch module SM2.
3', bank word time switch BTS3, backward highway BHTi'3. Demultiplexer DM
PX3 is converted into an analog signal (decoded) in the subscriber circuit LCB, converted into a two-wire signal, and reaches telephone B. Note that the speech signal sent from the telephone B1 also reaches the telephone A in the opposite direction to that described above, but passes through the gate G111 in the digital switch module SMZ of the space switch SSF as described above. In order to set up a connection road in both directions, the Intermediate Expressway JET/1', which connects Gts+Gat, and IEIF
'3' time slot information is gate control memory GC
Captured by M1.00M2, the above gate G131 G
The conduction of 31 is controlled according to the contents of the gate control memory GC&1+00M2, and the digital switch modules SMI and SM are interconnected.

In other words, the connection path (2) is set by the time slot in which Gls + Gst and the gate are brought into conduction.

When transitioning from the state shown in Figure 6 (→) to the state shown in section 6 1 (b), the connection path (■) will accommodate telephone B, as can be easily understood from Figure 6 (b). Since there is no connection change in digital switch module SM2, which is currently installed, there is no need for this call processor CPR2 to operate, and the connection is made in digital switch module SM, which accommodates %L story A. Road■
It is only necessary to change the connection from telephone A to return terminal 1.

At this time, the digital switch module SM.

The call processor CPR, which dominates the gate G13
I'm worried about changing the time slot to send 4 messages,
Gate control memo +) There is no woman who can praise GChh.

Call processor CPIh is simply a constraint, memory CM
By replacing I, the above gate G! s, G
31 and the connection path (3) set in the given time slot can be switched from the telephone A to the return terminal 1. The folding terminal is, for example, multiplexer M
PX, and demultiplexer DMPX.

The terminals 1 and 2 corresponding to each other are connected and crossed by a loop circuit LT.

Therefore, as shown in Fig. 6(b), the connection path ■ is the telephone &A
The other return terminal 2 is connected to the call processor CPR and the three-way terminal 1.
Through the operation of the call processor CPRn of the digital switch module Sun in which the trunk TIT is accommodated, the three-way trunk T
Connected to IFT. Note that this three-way trunk TWT can be accommodated in any digital switch module. In the above case, it is possible to accommodate the telephone A in the same digital switch module SM, but in this way, the telephone A is controlled only by the call processor CPR1, and the ) can be shifted to the state shown in FIG. 5(6).

In the state of FIG. 3(b), the first telephone A is connected to the second telephone A.
It is possible to talk to telephone B via the three-way trunk rlr, and the incoming call display tone 11T is heard via the three-way trunk TWT. As for the sixth telephone C, the ring tone RET is connected in the digital switch module SMs in which the sixth telephone C is housed.

The user listens to the incoming call display tone 11T on the first telephone set A, learns of the incoming call during a call, and performs a telephone call. This causes the state to shift to the state shown in FIG. 6(C). That is, the first telephone A is reconnected to the third telephone C via the connection path @, and can now make a call. The second telephone B is connected to the return terminals 1 and 2 of the digital switch module SM through the connection path ■.
Waiting front H5T is connected via. As can be easily seen from the figure, the digital switch module SN
In , the telephone iaB remains connected to the connection O and no change occurs in that connection, so its call processor CPR2 does not operate.

When the conversation between the first telephone A and the sixth telephone C is finished, the telephone qA is hooked up again, and as a result, as shown in FIG.
Transitioning to the state shown by ψ, the first telephone A is switched from the sixth telephone C to the second telephone B, and a conversation with telephone B can be made again. In this case as well, there is no need to change the connection between telephone B and its connection path (3) in digital switch module SM2, and its call processor CPR2 is inactive.

When the sixth telephone C, which has finished the call, goes on-hook, the connection of telephone C is released and the state returns to the state shown in FIG. 6(G).

At this time as well, digital switch module SM2
At , there is no change in the connection between telephone B and connection path (3), so call processor CPRz is inactive.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made within the technical scope thereof.

The invention may be implemented not only for call waiting services, but also for other six-way connections, such as conference calls.

Effects of the Invention Since the present invention is configured as described above, it includes a communication path network device consisting of a plurality of digital switch modules accommodating a plurality of telephones, and the above-mentioned digital switch module.
In a distributed control type time-division switching system in which each switch module is equipped with a call processor that individually controls the digital switch module, call waiting, three-way calling, etc.
In the case of a service that requires connection switching, there is no need to exchange information within the call processor, which simplifies the process of controlling connection switching, and reduces the load on the call processor and main processor. At the same time, there is an effect that connection switching is performed smoothly and instantaneous interruptions and other inconveniences are prevented.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of a distributed control type time-division switch comprised of a plurality of digital switch modules, each of which is controlled by a corresponding call processor, and FIG.
6 is a diagram showing connection state transition status in a call waiting service controlled by a single processor according to the conventional technology, and FIG. FIG. 3 is a diagram illustrating a transition state of a connection state. 5M1e SMz + SMs... Digital switch module, CPR,, CPR,, CPR3...
- Call processor, MPR...Main processor, CB...Common bus, A. B, C... 1st. 2nd and whistle 6 telephones, LC,
L.C.B. LCO...Subscriber circuit, MPX, ~MPX,...Multiplexer, DMPXx ~DMPXe-Demultiplex f, FTSl-FTS6''Forward time switch, BTS1~BTS,...Backward time switch, CMl-CM @...Control memory, GCM1~
GCM,...Gate control memory, SSF...Space switch, FHW, NFHW,...Forward highway, BHW, ~BHW,...Backward highway, IHrV, -IHW'6... Intermediate entry highway, IHW1' to IH11'6'...Intermediate exit highway, LT...Return loop circuit, 1.2...Return waiting display sound Patent applicant Fujitsu Ltd. Representative patent attorney Tama Mushi Artificial Department (6 others) text

Claims (1)

[Claims] A distributed control type time-division switching system comprising a communication path network device composed of a plurality of digital switch modules, and a call processor that individually controls a digital switch module for each digital switch module. The digital switch module is provided with a return terminal having two terminals connected to a return loop circuit, and a call in progress via the communication path network device is connected to the second terminal by an operation of one of the subscribers. When making a call connection with a third party, the call processor controlling the digital switch module that accommodates the operated subscriber switches the call connection to the desired terminal via the return terminal. A connection processing method characterized by connecting.