JPH1127384A - Multiplexer provided with call signal control circuit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the multiplexer provided with the call signal control circuit small in size by saving a maximum supply power required to generate a call signal. SOLUTION: The multiplexer 1 having pluralities of telephone set interfaces 4 is provided with a call signal power supply 2 to supply power to supply a call signal to a telephone set 5 connecting to the telephone set interface 4 and with a call signal control circuit 3 that controls supplied power, an the call signal control circuit 3 generates two signals C1 , C2 with different logical states such as levels inverted to each other and the signals C1 , C2 are fed to the telephone set interfaces divided into two groups.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multiplexing apparatus provided with a ringing signal control circuit, and more particularly to a miniaturized ringing signal power supply for a multiplexing apparatus having a plurality of telephone interface circuits for accommodating telephone lines. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multiplexing apparatus having a characteristic configuration for multiplexing.

[0002]

2. Description of the Related Art Conventionally, when a telephone (caller) of one exchange is connected to a telephone (callee) of another exchange, when the caller picks up the handset, an activation signal is transmitted through a subscriber line. When the preparation for reception is completed, a dial tone is sent from the exchange.

[0003] Then, the operation of the calling party sends the called party number to the exchange, selects the exchange of the called party via the transit exchange, and the exchange of the called party sends a ringing signal (Ri) to the called party.
ng.), ringing a bell, and sending a ring-back tone back to the caller.

In this case, the telephone supply voltage controlled by the ringing signal control circuit from the ringing signal power supply is supplied as a ringing signal to the telephone of the called party via the telephone interface to generate a bell sound. Figure 4
This will be described with reference to FIG. FIG. 4A is a conceptual configuration diagram of a multiplexing device provided with a conventional paging signal control circuit, and FIG. 4B is an explanatory diagram of a paging signal control method.

Referring to FIG. 4 (a), as shown in FIG. 4 (a), in the conventional multiplexing apparatus 21, the power supplied from the commercial power supply is composed of two power supplies of positive polarity and negative polarity, + _Hv and It is divided into -H _v constituting the call signal power 22. For example, using the commercial power supply of 150 V, constituting the negative power -H _v of + positive supply 75V + H _v and -75V.

[0006] The power supply + H _v from this call signal for the power source 22
And -H _v is supplied to the switching means such as a relay of the telephone interface 24 to be connected to each telephone 25, by controlling the operation of the switching means of the relay or the like by a signal C of the call signal control circuit 23, such as a relay supplied to telephone 25 + H _v or telephone supply voltage V consisting of -H _v occurs between the switching means of the midpoint and GND of the paging signal for supply 22 (ground line) as the call signal, to generate a ringer sound .

[0007] For example, the signal C of the call signal control circuit 23 is 16 Hz to
It is composed of a 20 Hz square wave pulse, and the signal C is low.
At the time of (L), the telephone interface 24 is + H _vOut
When the signal C is high (H), the telephone interface
24 is -H_vAnd output this positive and negative periodic voltage
It is supplied to each telephone set 25 as the machine supply voltage V.

In this case, when n telephones ₁ to _n simultaneously receive an incoming call and generate a bell sound all at once, the telephone interface ₁ is simultaneously transmitted to the _n telephones ₁ to _n.
Telephone supply voltage V ₁ ~V _n of the voltage in phase via-telephone interface _n is to be supplied.

[0009]

However, in such a paging signal control method, a power supply having a large maximum supply power is required as a power supply for the paging signal. There is a problem of not being able to respond sufficiently.

That is, in the conventional ringing signal control method, since all the telephones are supplied with the telephone supply voltage V having the same phase and the same voltage, the power supply for the n telephones is required in order to simultaneously ring the n telephones. Is required, and a call signal power supply 22 having a large capacity capable of supplying power for n units is required.

Further, in the conventional ringing signal control method, since all telephone supply voltages V _{1 to} V _n are in phase, −H _v becomes completely unused at the timing when + H _v is used. Conversely, -H _v + H _v is the timing that use because becomes completely unused state, without using only half of the power supply capability has originally has become bad-used efficiency.

In the conventional multiplexer, the number of telephone lines to be accommodated is large, and a large-capacity power supply is used. Therefore, the ratio of the power used for the power supply for the call signal is small, and the use efficiency is low. It didn't matter much.

However, in response to recent demands for downsizing of a multiplexing device by a user, the number of telephone lines to be accommodated has been increased to 4 to 6.
When the number is reduced to a line or the like, the relative power used as a power source for a call signal cannot be ignored.

For example, with respect to the used power of 31.3 W as the multiplexing device, about 9 W is used as the power for the call signal, and about 30% of the power is used as the power for the call signal. Therefore, low use efficiency has become a problem.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to reduce the size of a power supply for a call signal and a multiplexing device by saving the maximum supply power for generating a call signal.

[0016]

FIG. 1 is an explanatory view of the principle configuration of the present invention. Referring to FIG. 1, means for solving the problems in the present invention will be described. Refer to FIG. 1 (1) The present invention mounts a plurality of telephone interfaces 4 and supplies a call signal power supply 2 for supplying electric power for supplying a call signal to a telephone 5 connected to the telephone interface 4, and a power supply. In the multiplexing apparatus 1 provided with the paging signal control circuit 3 for controlling the power to be generated, the paging signal control circuit 3 includes two signals C ₁ and C _{2 having} different logics.
, And are connected so as to supply the respective signals C ₁ and C ₂ to a telephone interface group divided into two.

As described above, the call signal control circuit 3 generates _two signals C ₁ and C ₂ having different logics, and
By supplying the power to the divided telephone interface group, the maximum supply power of the call signal power supply 2 can be reduced, and the use efficiency of the call signal power supply 2 can be increased.

(2) Further, according to the present invention, in the above (1), the power source 2 for the calling signal has two positive and negative power sources + _Hv , -H.
_v and two signals C ₁ and C 2 of different logics.
₂ is composed of signals whose heights are inverted from each other, and a plurality of telephone interfaces 4 are equally divided into two.

By setting as described above, the maximum supply power of the call signal power supply 2 can be minimized, and the use efficiency of the call signal power supply 2 can be maximized. In this case, "equal" means that when the number n of the telephone interface 4 is an even number, the telephone interface is divided into n / 2, and the second signal C ₂ from the n / 2 + 1 = k-th telephone interface _k . And if n is an odd number, split into (n-1) / 2 and (n + 1) / 2, or conversely, split into (n + 1) / 2 and (n-1) / 2 to say, from the (n-1) + 1/ 2 = k -th telephone interface _k, or, applying the (n + 1) / 2 + 1 = k -th from the telephone interface _k second signal C _2.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Here, an embodiment of the present invention will be described with reference to FIGS. Referring to FIG. 2, FIG. 2 is a conceptual configuration diagram of a multiplexing apparatus 11 including a call signal control circuit of the present invention. The basic configuration is the same as that of a conventional multiplexing apparatus, and is supplied from a commercial power supply. power, two power positive and negative 75V, is divided into + H _v and -H _v constituting the call signal supply 12.

[0021] The power supply + H _v from this call signal for the power supply 12
And -H _v are each as in the conventional multiplexer telephone 15
The switching means such as a relay of the telephone interface 14 connected to the telephone interface 14 is controlled by the signal of the ringing signal control circuit 13 to control the operation of the switching means such as the relay. the telephone supply voltage V consisting generated + H _v or -H _v between the GND of the power supply 12 (ground line) supplied to the telephone set 15 as the call signal, to generate a ringer sound.

However, in the embodiment of the present invention, the call signal control circuit 13 generates _two signals C ₁ and C ₂ having different logics, and a total of n telephone interfaces 14 are mounted. are cases, when n is an even number, supplies the signals C ₁ to the telephone interface ₁ to the telephone interface _{n / 2,} whereas the signal C ₂ telephone interface _{n / 2 + 1} to the telephone interface _n
Is to be supplied to

When n is an odd number, the telephone interface 14 is divided into (n-1) / 2 groups and (n + 1) /
Divided into two groups, and supplies a signal C ₁ at one telephone interface unit and supplies a signal C ₂ to the other telephone interface group.

Referring to FIG. 3, the signals C ₁ and C ₂ of the call signal control circuit 13 are 16H
It is composed of a rectangular wave pulse signal of z to 20 Hz, for example, 16 Hz, and is composed of signals whose levels are inverted (“H”, “L”), that is, signals whose logic is inverted.

[0025] Then, when the signal C ₁ is at a low of (L), the telephone interface ₁ to the telephone interface _{n / 2} is + H _v outputs, telephone interface _{n / 2} signal C ₂ of the high (H) is applied _{+ 1} to phone interface
_n outputs a -H _v.

On the other hand, when the signal C ₁ is high (H), the telephone interface ₁ to the telephone interface _{n / 2} are
Outputs H _v, telephone interface signal C ₂ of the low (L) is applied _{n / 2 + 1} ~ phone interface _n
Outputs + H _v.

As a result, the telephone ₁ to the telephone _{n / 2} are supplied with the telephone supply voltage V _{1 to} V _{n / 2} whose signal level is inverted with respect to the signal C ₁ , while the telephones _{n / 2 + 1} to the telephone _n are supplied to the telephones ₁ to _{n / 2.} Is the telephone supply voltage V ₁ -V _{n / 2} and the telephone supply voltage V in which the polarity is inverted.
_{n / 2 + 1} ~V _n is supplied.

Therefore, when power is supplied from the power supply + _Hv to the telephones ₁ to _{n / 2} , the telephones _{n / 2 + 1}
~ Power from a power source -H _v is supplied to the telephone _n, also,
Phone ₁ Phone _{n /} when the power from the power source -H _v is supplied to the _2, the phone _{n / 2 + 1} to the telephone _n power + H _v
Will be supplied with power.

As a result, even when the n telephones ₁ to _n arrive at the same time, half of the telephones ₁ to _{n / 2} receive telephone supply voltages V _{1 to} V _{n / 2} from one power supply. when they are, the telephone _{n / 2 + 1} ~ phone _n other supply telephone supply voltage V _{n / 2 + 1} ~V _n reverse phase to the telephone supply voltage V ₁ ~V n / ₂ from the power supply to Therefore, the maximum supply power of the call signal power supply 12, and therefore, the maximum power capacity can be reduced to half of the conventional power supply.

In the above description of the embodiment of the present invention, a typical telephone and its call signal control device are described. However, the present invention is not limited to a typical telephone, and The present invention is applicable to general type communication terminals, that is, telephones in a broad sense, and the call signal does not need to be a bell sound, but may be a call by flashing light.

[0031]

According to the present invention, since a call signal is generated using two call signal control signals having different logics, the use efficiency of the call signal power supply is increased, and the maximum power capacity of the call signal power supply is increased. Therefore, it is possible to reduce the size of the calling signal power supply of the multiplexer equipped with a plurality of telephone interfaces and the multiplexer itself.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a basic configuration of the present invention.

FIG. 2 is a configuration diagram of a multiplexer including a call signal control circuit according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram of a paging signal control method according to the embodiment of the present invention.

FIG. 4 is an explanatory diagram of a multiplexing device including a conventional paging signal control circuit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Multiplexer 2 Paging signal power supply 3 Paging signal control circuit 4 Telephone interface 5 Telephone 11 Multiplexer 12 Paging signal power supply 13 Paging signal control circuit 14 Telephone interface 15 Telephone 21 Multiplexer 22 Paging signal power supply 23 Paging signal Control circuit 24 Telephone interface 25 Telephone

Claims (2)

[Claims] 1. A call signal power supply for mounting a plurality of telephone interfaces and supplying power for supplying a call signal to a telephone connected to the telephone interface, and a call signal for controlling the supplied power. In a multiplexing apparatus having a control circuit, the ringing signal control circuit has a function of generating two signals having different logics, and is connected so as to supply the respective signals to a telephone interface group divided into two. A multiplexing device comprising a paging signal control circuit, characterized in that: 2. The power supply for a calling signal comprises two power supplies of positive and negative, and the two signals having different logics comprise signals whose heights are inverted from each other. 2. A multiplexing apparatus comprising a paging signal control circuit according to claim 1, wherein the multiplexing apparatus is divided into two.