JPS5853262A - Announcement transmitting system - Google Patents

Abstract

PURPOSE:To exclude a control memory and to decrease the number of processes and hardwares, by providing a storage area for noncall signal at a channel memory. CONSTITUTION:An announcement transmitting system includes a backward channel memory SPMB containing a storage area SP which stores the call signal and a storage area P which stores the noncall signal, an inserter I2, a digital announcing machine ANN, a gate circuit AG, and a demultiplexer DMPX. Then an address signal corresponding to a telephone is written into the area P and then read out with a time slot allotted to a telephone circuit. The read-out signal is applied to a gate circuit, and an insertion is indicated to the inserter. The output of the announcing machine is selected to an outgoing highway and fed to the telephone via the demultiplexer.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an announcement transmission system, and more particularly, to an announcement transmission system for announcing, for example, abnormal congestion information to subscribers in a time division telephone exchange.

In the event of abnormal congestion, a message is sent in the form of voice to request the calling subscriber to suppress calls, i.e.,
All announcements are being sent out.

In time-division telephone exchanges as well, announcements in the event of abnormal congestion are generally sent out in the line handling section (subscriber circuit, etc.) by sending the message in the form of an analog signal to the originating subscriber.

FIG. 1 is an explanatory diagram showing an example of an announcement transmission method in a time division telephone exchange. In the figure, S indicates a subscriber telephone, LC indicates a subscriber circuit of the subscriber telephone, and ANN indicates an analog announcement machine (for example, a tape recorder). The subscriber circuit LC is an encoding/decoding circuit C0DE.
C, includes a universal access relay UA, and normally the telephone S is connected to the encoding/decoding circuit C0-DEC via the normal contact uak of the relay UA; as is well known, the telephone S The analog speech signal from the time-division channel network TDSW is encoded (digitized) by the encoding/decoding circuit C0DEC and sent to the time-division channel network TDSW, and the digital speech signal from the time-division channel network TDSW is encoded (digitized) by the encoder/decoder circuit C0DEC. In the decoding circuit C0DEC, the signal is decoded (analogized) and sent to the telephone S. When sending an announcement to telephone S, a control device (not shown) sends an announcement to telephone S.
Universal access relay U of subscriber circuit LC
Send a drive signal (in this case, earth) (3) to A to operate it. As a result, the contact point ua is switched, the announcement machine ANN is connected to the telephone set S, and an announcement (voice information such as a message requesting suppression of outgoing calls due to abnormal congestion) is sent out.

The above Universal Access Relay UA is
In addition to the above, it is generally provided in a subscriber circuit in order to switch the telephone set S or the subscriber line to the telephone set S to a testing device or a signal device such as a Howler transmitter.

In the conventional method described above, the number of telephones (lines) that can be connected to the announcement machine ANN at the same time is undefined, so in order to send out good announcements to many subscribers at the same time, the capacity of the announcement machine depends on the number of lines. However, it is difficult to make the announcement machine economical since the capacity of the announcement machine must be considerably increased.

In time division switches, ie, digital switches, which use digital signals, it is more economical to digitize the announcement machine and demultiplex the digital output for transmission to the desired subscribers.

(4) However, there is no need to send an announcement for a call in progress, and it is necessary to send an announcement only when there is a new call, so it is necessary to control the sending for each call channel. Therefore, a control memory or the like is required to hold the announce sending channel.

The present invention eliminates the above-mentioned uneconomical drawbacks when using the analog announcement machine mentioned above, and also provides transmission control for each communication channel when using the above-mentioned digital announcement machine. It is an object of the present invention to provide an economical announcement transmission system in a time-division switch, which eliminates the need for a control memory to hold all announcement transmission channels.

The present invention provides a memory for non-speech signals that can store one bit of a non-speech signal corresponding to each channel together with the corresponding speech signal, in addition to a speech signal storage area for each channel, in the speech path memory. The call signal is read out and used as a gate signal for sending out an announcement.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is a connection diagram of the first embodiment of the present invention.

In the figure, Sa is a subscriber telephone, Lc is a subscriber circuit,
MPX is a multiplexer, SPMF is a forward
HM is a channel holding memory, sPc is a channel control device, and DMPX is a demultiplexer.

In addition, the forward channel memory SPMF and the time
Slot counter T-CTR and channel maintenance memo I
JHM constitutes a forward time switch, and like backward channel memory SPMB, time slot counter T-CTR and channel holding memory HM constitute a backward time switch. A T-8-T type time-division communication channel network is constituted by the two time switches and the space switch SSW located between them.

The forward and backward time switches (forward channel memory SPMF and backward channel memory SPMB) are pair-controlled, so that the time slot counter T-CTR and the channel holding memory HM are shared by both.

A regular exchange operation is performed as follows. Here, the backward communication path memory SPMB has, in addition to an area SP for storing speech signals, a storage area P for storing one non-speech signal corresponding to the speech signal for each channel. The speech signal sent from the telephone Sb (not shown) is encoded (digitized) in its subscriber circuit and input to the multiplexer MPX, where it is time-division multiplexed with the digitized speech signals from other telephones. The signal is then converted into serial/parallel data and input into the forward path memory SPMF via the input highway HWF'i.

(time slot) with respect to the call signal of the telephone Sb.
Assuming that TSb is assigned, the above-mentioned speech signal is written to the address (b) specified by the information that occurs when the time slot counter T-CTR is at time slot TSb.

Hereinafter, as in the known time-division communication network, the communication signal is transferred to the intermediate highway in a time slot different from the time slot TSb at the time of input, according to the contents of the communication path maintenance memo UHM. IHW+ and the desired intermediate highway I HW at the space switch SSW without changing the time slots.
Output to 2.

This call signal is input from the intermediate highway II (W2) to the backward call route memo!j SPMB K. In the case of a normal call, the inserter 11 provided on the intermediate highway Hff2 has no effect.

Function of time slot counter T-CTR and communication path maintenance memo IJ
It is written to one address of the PMB call signal area SP, and is read out at a specified time slot (in this case, time slot 'rsa), and the time slot is replaced. T
It is output to the output highway HWB on the SIL, and then passes through the inserter 12 to the demultiplexer DM.

Enter into PX. In the case of such a normal call, the inserter I2 is inactive and is carried to the demultiplexer DMPX in the time slot TSa (8).The call signal is separated here and also parallel-serialized. , is sent to the subscriber circuit LC of the telephone set Sa, where it is decoded into an analog speech signal and reaches the telephone set Sa.

A call signal sent from the telephone set Sa is also sent to the telephone set sb (not shown) in the same manner as described above, and a call path is set up between the two telephone sets, so that a call can be made.

Next, a case will be explained in which a message or the like is sent to the telephone set Sa that has made a new call, requesting that calls be suppressed due to abnormal congestion.

When the main processor MPR determines that the above-mentioned message should be sent to the calling telephone Sa, the main processor MPR controls the speech path control device SPC, and thereby the space switch SSW and the backward speech memory S
An empty time slot on the intermediate highway I HW 2 connecting to the PMB, for example, Te1 (and the time slot assigned to the calling telephone Sa) TSa (!:) is connected via the backward call route memo IJsPMB. Set the communication path maintenance memo lJHMt.

At time slot TSk, the communication path control device RPC
sends a signal to the inserter 1, and the corresponding time slot TS
At k, one signal line PL K ``1''' provided outside the eight call signal lines (carrying 8-bit parallel signals as call signals) of the intermediate highway I HW 2 is inserted.

The data input to the backward communication path memo IJ SPMB in time slot TSk is inputted using the information (in this case, a) read from the communication path maintenance memo IJ HM in the time slot TSk as the address. Call route memo IJ Written to address (a) of SPMB. That is, u I II is written in the storage area P for non-call signals at the address.

Information output from time slot counter T-CTR in time slot Tsa (in this case a)
as the address, backward channel memory S PM
Data is read from B. That is, in time slot TSa, the signal line PL of the outgoing highway H-WB
1" is read out. This "1" is inputted to one input terminal of the AND gate AG as a gate signal.

When sending an announcement, the communication path control device SPC
The pavi is sent as an announcement control signal (ANNC) from the announcement machine ANN to the announcement machine ANN. This u1'' becomes the other input of the AND gate AG.

When II II II is read out to the signal line PL in 'rsa, this is given as the gate signal of the AND gate AG, and its output becomes Pavi, which is sent to the inserter I2 as an announcement control signal. The inserter 2 operates and inserts the digital signal of the message sent from the digital announcement machine ANN into the eight call signal lines SL of the outgoing way HWB.

That is, the output of the digital announcement machine ANN is inserted into the outgoing way HWB in the time slot TSa assigned to the calling telephone Sa, and as described above, the output of the digital announcement machine ANN is inserted into the outgoing way HWB in the time slot TSa assigned to the calling telephone Sa. The message is separated from the call signal to reach the calling telephone Sa, and the message is heard by the calling subscriber.

FIG. 3 is a connection diagram of a second embodiment of the present invention.

(11) This example was also implemented in a time-division switch with a T-8-T configuration like that shown in FIG. The check bits generated by the above are added to the speech signal (digitized 8-bit signal) for each channel, and are stored in the check bit (non-speech signal) storage area provided in the forward and backward speech path memories. C,
It is configured to be carried along with the call signal to the corresponding check/village output side, where a parity check is performed.

In FIG. 3, the symbols are the same as in FIG. 2. Note that PG is a parity check bit generation circuit,
PC is a parity check circuit.

In addition, the forward channel memory SPMF and the time
The slot counter T-CTR and the channel maintenance memory HM constitute a forward time switch, and the time slot counter T-CTR and the channel maintenance memory IJ HM constitute the forward time switch as well as the backward channel memory SPMB. A backward time switch (12) is configured, and these two time switches and a space switch SSW located between them constitute a T-8-T type time division communication channel network. As in FIG. 2, the time switches (forward channel memory SPMP and backward channel memory SPMS) are controlled in pairs, and the time slot counter T-CTR and channel holding memo IJHM are shared by both. It is.

°The regular exchange operation is performed as follows. Here, the forward and backward call path memories SPMF and SPMB each store a non-call signal that stores a parity check billboard corresponding to each call signal (8 pits) in addition to the storage area SP that stores a call signal. It has a storage area Pi. The speech signal sent from the telephone Sb (not shown) is encoded (digitized) in its subscriber circuit and enters the multiplexer MPX, where it is time-shared with the digitized speech signals of other telephones. Multiplexed, further serial/parallel converted, input highway HW
It is input to the forward call path memo IJ SPMF through the eight call signal lines SLk in F. The above call signal is also input to a parity check bit generator PG, which generates a parity check bit for the above call signal, and passes through the signal line PL in the middle of the incoming highway to the forward call path together with the above call signal. Input to memory S PMF. Assuming that a time slot TSb is assigned to the speech signal of telephone Sb, the speech signal and its parity check bit are stored in the speech signal storage area SP and check bit storage area, respectively. P is written to the address (b) specified by the information (b) sent by the time slot counter T-CTR at time slot TSb.

Hereinafter, as in the known time-division communication network, the communication signal and its check bit are transferred to an intermediate time slot in a time slot different from the time slot TSb at the time of input, according to the contents of the communication path maintenance memo IJHM. The desired intermediate highway I
Output to HW2.

This signal (call signal and its check pit) is transmitted from the intermediate highway I HW2 to the backward call path memory S.
Enter into PMH. In this case, the intermediate highway IH
The inserter 11/li provided in W2 has no effect.

Due to the action of the time slot counter T-CTR and the contents of the communication path maintenance memo IJHM, the above telephone Sb
The communication signals and their check pits undergo time slot replacement in the backward communication path memory SPMH, and are outputted to the outgoing highway HWB on the time thrower TSa.

This is input to a parity check circuit PC, where a parity check is performed.

The above call signal is branched and input to the demultiplexer DMPX via the inserter he via the eight call signal lines of the output/way HWB. In this case, the inserter 2 is inactive and the said telephone Sb,L carried to the demultiplexer DMPX in the time slot TSa:F
) is separated here, parallel-to-serial converted, and sent to the subscriber circuit LC of telephone Sa (15), where it is decoded into an analog speech signal and sent to telephone Sa.
reach a.

A call signal sent from the telephone Sa is also sent to the telephone Sb (not shown) in the same manner as described above, and a call path is established between the two telephones, allowing a call to be made.

Now, a case will be explained in which a message or the like is sent to the telephone set Sa that made the call, requesting that the call be suppressed due to abnormal congestion.

When the main processor MPR determines that the above message should be sent to the calling telephone Sa, the main processor MPR controls the speech path control device spc', thereby controlling the space switch SSW and the backward speech memory SP.
An empty time slot of the intermediate highway I HW 2 connecting the MB (for example, a time slot assigned to the calling telephone Sa) and TSa are connected via the backward channel memory SPMB l.
Set the communication path holding memory HM.

At TS, k, the communication path control device SPC sends data to the inserter 1 (time thrower).
16) Insert 1" into the signal line PL for the retention check pit. At this time, insert "0" in the time slot corresponding to the subscriber who does not transmit all announcements. In other words, inserts "0" in the time slot corresponding to the subscriber who does not transmit all announcements. Insert a ``1'' only in the time slot corresponding to the subscriber.

Backward call route memo on time slot TS1c! The data input to J SPMB is written to the communication path memo IJ SPMH using the information (in this case, a) read from the communication path holding memo IJHM at the time slot TSk as an address. That is, "1#" is written in the non-call signal storage area P for the parity check pit of the address.

In time slot TSa, time slot
Information output from counter T-CTR (in this case a
) as the address, backward communication path memory SP
Data is read from the MB. In other words, time thrower) At TSa, parity check pit signal +11 on exit highway HWB! 111 II to PL
is read out. This a1'' is input as a gate signal to one input terminal of the analogue (AG+).

When transmitting an announcement, in addition to the above-mentioned control, 1''' is also transmitted from the channel control device spc to the announcement machine as an announcement control signal (ANNC). -) A
This becomes the other input of Gl. Therefore, the time thrower)
In TSa, when the signal line PLK "l" is read, the output of the above-mentioned ant game) AG+ becomes I11#, which is given to the inserter I2, which operates and sends the signal from the digital announcement machine A-NN. The digital signal of the above message sent to the highway HW
Insert into the eight call signal lines SL of B.

That is, the output of the digital announcement machine A-NN is inserted into the outgoing highway H-WB in the time slot TSa assigned to the calling telephone Sa, and as mentioned above, Separated from the signal to the telephone, the calling telephone S
aK is reached and the calling subscriber hears the above message.

In the case of the above announcement transmission, no parity check is performed. That is, as an announcement control signal (ANNC) to the announcement machine, the communication path control device SPC
When II I II is sent from
2 becomes non-conductive, and the signal (pcs) indicating the check result of the parity check circuit PC (when normal, II
Q II, "to 1" in case of error) is prevented.

Although the present invention has been described in detail above, the present invention is not limited to the above embodiments. The present invention provides a storage area for non-speech signals "1" in the speech path memory on the output side of a time-division exchange, outside the storage area for speech signals, and a non-speech signal corresponding to the speech signal for each channel in the memory area. Since the call signal is read out and used as a gate signal for the announcement control signal that controls announcement transmission, it is clear that the configuration of the time-division call network is not limited to the T-8-T configuration of the above embodiment. . The non-call signal storage area provided in the outgoing call path memory, which was originally provided for purposes other than announcement sending (19), may be shared in some cases.

Since the present invention is constructed as described above, it is possible to eliminate the above-mentioned drawbacks of an announcement delivery method using an analog type announcement machine, and also to eliminate the above-mentioned disadvantages of an announcement delivery method using a digital type announcement machine. There is no need for a control memory for controlling each channel and holding communication channels for transmitting announcements, which were conventionally required, and the processing and hardware required for transmitting announcements are reduced, resulting in an economical effect.

In some cases, it is also possible to share the storage area for non-call signals that should be added to the communication path memory on the outgoing side, provided for other purposes.In this case, the advantage is that it becomes more economical. There is.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of a conventional announcement sending method using an analog announcement machine, Fig. 2 is a connection diagram of one embodiment of the present invention, and Fig. 3 is a connection diagram of a different embodiment of the present invention. be. (20) Sa...Subscriber telephone, LC...Subscriber circuit, MP
X...Multiplexer, SPMF...Forward channel memory, SSW...Space switch, SPMB...
...Backward channel memory, T-CTR...Time slot counter, HM...Call channel maintenance memo I
J, SPC...Speech path control device, SP...Speech signal storage area, P...Non-speech signal storage area, DMP
X...Demultiplexer, ANN...Announcement
Machine, lllI2...Inserter, PG...Parity check bit generator, PC...Parity check bit generator
Check circuit, AG, AG+, AG2...AND gate. Patent Applicant Fujitsu Ltd. Representative Patent Attorney Hisa Gobe Tamamushi (3 others) Figure 1

Claims (2)

[Claims] (1) In a time division switch, a backward channel memory including a storage area for storing speech signals and a storage area for storing non-speech signals corresponding to the speech signal is connected to the backward channel memory and a demultiplexer. an inserter provided on the exit highway; a digital announcement machine disposed so that its output can be inserted into the exit highway via the inserter; and an inserter configured to insert the output of the announcement machine into the exit highway. and a gate circuit for a signal instructing the phone to write the signal to the address corresponding to the telephone to which the announcement is to be sent in the non-call signal storage area of the backward communication path memory, and write the signal in the time slot assigned to the telephone line. The readout signal is given to the gate circuit as a gate signal, and through the gate, the instruction signal is given to the inner (1) at once, and the output of the announcement machine is inserted into the output highway in the time slot. , an announcement transmission method characterized in that the announcement is transmitted to the above-mentioned telephone set. (2) Announcement transmission according to claim 1, characterized in that a storage area for storing parity check signals is used as a storage area for non-communication signals in the backward communication path memory. method.