JPS5943866B2 - Audible sound distribution method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an audible sound distribution system for distributing audible sound signals such as ringing tones in a time division switch.

A time division switch is configured in an S-T-S configuration or a T-S-T configuration by combining a time switch that exchanges time slots within a highway and a space switch S that exchanges time slots between highways. etc.

In such a time division switch, when transmitting an audible sound signal such as a ring tone in the time slot of a selected outgoing line, in a conventional time division switch with a T-S-T configuration,
It has been common to use only primary or secondary time switches in multiple connections to distribute audible signals. For example, in a multiplex distribution system using only the primary time switch, the time slots for the audible sound signals of the spatial switch and the secondary time switch are required to correspond to the time slots of the outgoing lines from which the audible sound signals are sent, Since there are fewer slots, there is a drawback that the connection quality of calls deteriorates.

In addition, a method of multiplexing and distributing only using a secondary time switch has less impact on call connection quality than the above method, but if the primary and secondary time switches are composed of multiple units, An audible sound signal source had to be provided for the time switch unit. The present invention includes 1
It is an object of the present invention to enable an audible sound signal to be distributed among individual audible sound signal sources without affecting connection quality of a telephone call.

The present invention provides an audible signal from an audible signal transmitting device connected to a primary time switch in a T-S-T configuration.
By multiplexing the spatial switches, the signals are distributed to a plurality of secondary time switch units, and distributed to selected time slots in the secondary time switches. Examples will be described in detail below. The figure is a block diagram of an embodiment of the present invention, where TNG is an audible signal transmitter, P
T5W~PTSW3 is the primary time switch unit, S
SW is a space switch, 5T5W1 to 5TSW3 are secondary time switch units, SCM is space switch control memory, PSM is primary speech memory, PTCM is primary time switch control memory, SSM is secondary speech memory, STCM is 2
Next time switch control memory, CC is central controller, SP
C is a communication path system control device.

The time slot POPCM audible sound signal output from the audible sound signal transmitting device TNG is written to the address corresponding to the internal time slot t of the primary communication memory PSM under the control of the primary time switch control memory PTCM, and It is read out to the internal highway at time t.

In the spatial switch SSW, the spatial switch control memory SCM
A plurality of gates are turned on simultaneously at the internal time slot t under the control of the secondary time switch unit S.
The audible sound signal is distributed to TSW1 to STSW3. In the secondary time switch units STSW, .

The above operations are executed by forming a semi-fixed communication path regardless of the presence or absence of an audible signal request call. When an audible signal request call occurs, the secondary time switch unit S
In TSW1 to STSW3, under the control of the secondary time switch unit control memory STCM, an audible sound signal is read out from the address corresponding to the internal time slot t of the secondary speech memory SSM at the time of the time slot of the outgoing line for the request call and sent out. For example, secondary time switch←STSWl
indicates that the signal is read out and sent to the respective time slots Ql and q2 of the outgoing line, and the secondary time switch unit STSW2 indicates that the time slot Rl of the outgoing line is read out and sent out.
, r2. Although this embodiment shows a case with three primary and secondary time switch units, it can also be applied to a case with a larger number of time switch units, and even in that case, the audible sound signal Even if there is only one sending device TNG, multiple distribution is possible.

Of course, it is also possible to provide a number of audible signal transmitting devices depending on the type of audible signal. As explained above,
The present invention provides a time division switch having a T-S-T configuration.
By multiplexing the audible sound signal from the audible sound signal transmitting device TNG connected to the next time switch unit to the spatial switch SSW, the second time switch unit STS
The audible sound signal is simultaneously distributed to W1-STSW3, and the audible sound signal is inserted into a predetermined time slot and transmitted in response to a call requesting an audible sound signal in the secondary time switch units STSW1-STSW3.

Therefore, one audible signal transmitter TNG is sufficient, and since only one internal time slot of the primary time switch is used for the audible signal, there is no deterioration in the connection quality of the call. There are no advantages. It should be noted that the present invention is not limited to the above-described embodiments, but can be modified in various ways.

[Brief explanation of the drawing]

The figure is a block diagram of an embodiment of the present invention.

Claims (1)

[Claims] 1. In an audible sound distribution system in a time division exchange having at least a primary time switch, a spatial switch, and a secondary time switch, an audible sound signal from an audible sound signal transmitting device connected to a primary time switch unit is An audible sound distribution system characterized by simultaneously distributing to a plurality of secondary time switch units by multiple connection of the spatial switches.