JP2000261837A - Speaking level control system in telephone exchange - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a speaking quality by switch-controlling a speaking level by a hands-free speaking part so as to correct a level difference by a line condition, etc., so as to reduce variations of the speaking level in the case of speaking between a telephone line, an extension or an intercom and the hands-free speaking part. SOLUTION: A speaking level outputted from the HYB 1 of a 2-4 line conversion part via an intercom interface part 10 can automatically be switched for an intercom 1 or an intercom 2 by controlling the amplifier AMP 2 of the part 11 concerning a voice output to the intercom 1 and 2 from extension telephone sets T1 to T4 or the hands-free speaking part 13. This speech between the intercom 1, 2 and the part 13 and a speaking level between the sets T1 to T4 and the part 13 are switch-controlled by the part 13 to correct a level difference due to the line condition, etc., to extremely reduce variations of each speaking level.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a telephone line, an extension,
The purpose of this is to improve the communication quality by reducing the variation in the communication level in devices having different communication levels such as door phones.

[0002]

A conventional device of this kind is installed in each dwelling unit of an apartment house, and a door phone is installed in each dwelling entrance and a lobby common to each dwelling unit. It is possible to make a call between the door phone and the hands-free call unit using the hands-free function, a call between the door phone and the extension phone, a call between the extension phone and the hands-free call unit, or a call between the telephone line and the hands-free call unit. The doorphone is installed as a front doorphone for each dwelling unit, and in a shared lobby, it is installed as a lobby doorphone that can be connected to each dwelling unit. Since the same doorphone cannot be used as the doorphone, the call level with the extension telephone or hands-free call Different door entrance intercom and lobby In intercom call level, it is necessary to adjust the input level from the output level and the intercom to the door phone individually. In addition, in the case of a call between the door phone and the hands-free call unit, since both the door phone and the hands-free call unit speak away from the device, it is necessary to raise the call level of the hands-free call unit compared to the call between the door phone and the extension phone. there were. Also, in the case of a call between the extension and the hands-free call unit or a call between the telephone line and the hands-free call unit, the call is too large, so that it is necessary to adjust the call level in the hands-free call unit. Therefore, there was no one that had a function to automatically adjust all the call levels at low cost, so it was used with the call levels varied, or it was necessary to use an expensive digital system with an automatic level control function. Was.

[0003]

In order to solve the above-mentioned problems, an interface unit capable of receiving an incoming call from a door phone and calling a door phone, a 2-4 wire conversion unit capable of switching and controlling an input / output level of the door phone, A connection unit for interconnecting the extension telephone with the door phone and the hands-free communication unit, and controlling the input / output level of the voice of the door phone via the 2-4 line conversion unit and the input / output level of the voice from the extension. A hands-free communication unit capable of switching between an audio input level from each intercom and an audio output level to the intercom by the 2-4 wire conversion unit, and changing the type of intercom (for example, for each dwelling entrance, lobby) Etc.) and reduce the call level between the door phone and the hands-free call section and the call level between the extension phone and the hands-free call section. Was less variation in the respective call-level by correcting the level difference due to line conditions by switching control in the hands-free communication unit. With such means, the 2-4 conversion unit can automatically adjust the call level between a plurality of doorphones, and the hands-free call unit can automatically adjust the call level between the extension telephone and the doorphone.

In another aspect of the present invention, a switch unit for connecting a telephone line and a hands-free communication unit and a communication unit for connecting the telephone line and the hands-free communication unit are provided. The call level between the telephone and the extension telephone and the hands-free communication unit is switched and controlled by the hands-free communication unit, thereby correcting the level difference due to the line conditions and the like, and the variation in each communication level is extremely reduced. With such means, the 2-4 conversion unit can automatically adjust the communication level between a plurality of doorphones, and the hands-free communication unit can automatically adjust the communication level with a telephone line, an extension telephone, or a doorphone. is there.

[0005]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; FIG. 1 is a block diagram showing an embodiment of the present invention;
Is an external line terminal for receiving a telephone line, EXT1 to EX
T4 is an extension terminal for receiving a telephone, etc., DH1, D
H2 is a door phone terminal for accommodating a door phone, 10 is a door phone interface unit, 11 is a 2-4 wire conversion unit,
12 is a switch unit, 13 is a hands-free communication unit, 14 is an extension circuit unit, 15 is an external line interface unit, and 16 is C
This is a PU unit.

Hereinafter, description will be given with reference to the block diagram shown in FIG. Now, when a call button (not shown) of the door phone 1 is depressed, a call from the door phone 1 is detected by the door phone interface unit 10, and the CPU 16 sends the call from the speaker SP via the voice control unit VCU of the hands-free call unit 13. An intercom ring tone is output and the extension circuit unit 14 is controlled to ring the bells of all extension telephones T1 to T4 connected to the extension terminals EXT1 to EXT4. Further, the CPU section 16 includes an amplifier AMP of the 2-4 wire conversion section 11.
1. The amplification level of AMP2 is switched for doorphone 1.

For example, when a response is made by the extension telephone T1 connected to the extension terminal EXT1, the off-hook is detected by the extension circuit unit 14, and the CPU unit 16 detects the off-hook of the other extension telephones T2 to T4 connected to the EXT2 to EXT4. The bell is stopped, and the ring tone from the door phone of the hands-free communication unit 13 is stopped. Further, the analog switch (A) of the switch section 12 is operated to connect the intercom 1 and the extension telephone T1 in the next route, so that a call can be made between the intercom 1 and the extension telephone T1. Doorphone 1 (DH1) -10-11-12 (A) -14
-EXT1-extension telephone T1 Similarly, when a call button (not shown) of the intercom 2 is pressed, a call from the intercom 2 is detected by the intercom interface unit 10, and the voice of the hands-free call unit 13 is detected by the CPU unit 16. An intercom ring tone is output from the speaker SP via the control unit VCU and the extension circuit unit 1
4 to ring the bells of all extension telephones T1 to T4 connected to the extension terminals EXT1 to EXT4.
Further, the CPU section 16 includes the amplifier AM of the 2-4 wire conversion section 10.
The amplification levels of P1 and AMP2 are switched for doorphone 2. Extension telephone T1 connected to extension terminal EXT1
When the response is made, the off-hook is detected by the extension circuit unit 14, and the CPU unit 16 stops the bells of the other extension telephones T2 to T4 connected to the EXT2 to EXT4, and receives a call from the door phone 2 of the hands-free communication unit 13. Stop the sound. Further, the analog switch (A) of the switch section 12 is operated to connect the intercom 2 and the extension telephone T1 in the next route so that a call can be made between the intercom 2 and the extension telephone T1. Doorphone 2 (DH2) -10-11-12 (A) -14
-EXT1-extension telephone T1

As described above, the audio output from the extension telephone or the hands-free communication unit 13 to the doorphone 1 and the doorphone 2 is controlled by the amplifier AMP2 of the 2-4 line conversion unit 11 so that the 2-4 line conversion unit 11 Can be automatically switched between the HYB 1 and the intercom interface 10 for the intercom 1 or the intercom 2. The voice input from the doorphone of 1 or 2 is HYB1 of the 2-4 wire converter 11, the amplifier AMP.
1. By switching the communication level output to the switch unit 12 via the HYB2 by the amplifier AMP1,
A fixed call level can be set regardless of the intercom 1 and the intercom 2, and a call can be made at a fixed call level regardless of the intercom 1 and the intercom 2 by the extension telephone or the hands-free communication unit 13 for talking with the intercom.

Next, the extension telephone and the hands-free communication unit 1
In the case of a call with No. 3, when a call / answer button (not shown) mounted on the hands-free call unit 13 is pressed, C
The PU unit 16 controls the extension circuit unit 14 to control the extension terminal EXT.
All extension telephones T1 to T1 to EXT4
Ring the bell at T4. For example, when the extension telephone T1 connected to the extension terminal EXT1 answers, the extension circuit unit 14 detects an off-hook and the CPU unit 16 sets the EXT2 to EXT2.
The bells of the other extension telephones T2 to T4 connected to the EXT 4 are stopped, and the voice control unit VCU of the hands-free communication unit 13 is controlled to switch the input / output level for the extension telephone. C) is operated to connect the extension telephone T1 to the hands-free communication unit 13 and make a call through the next route. Extension telephone T1-EXT1-14-12 (C) -13

Similarly, the door phone and the hands-free communication unit 13
For example, when a call button is pressed on the door phone 1, a call from the door phone 1 is detected by the door phone interface unit 10, and the CPU unit 16 outputs a speaker via the voice control unit VCU of the hands-free call unit 13. The SP transmits an intercom ring tone and controls the extension circuit unit 14 to ring the bells of all extension telephones T1 to T4 connected to the extension terminals EXT1 to EXT4. Further, the CPU section 16 switches the amplification levels of the amplifiers AMP1 and AMP2 of the 2-4 wire conversion section 10 to those for the door phone 1. When a response button (not shown) mounted on the hands-free communication unit 13 is pressed, the CPU unit 16 detects the pressing of the response button and controls the extension circuit unit 14 to execute EX.
All extensions T2 connected to T2 to EXT4
~ T4 bell is stopped and hands-free communication unit 13
The voice control unit VCU is controlled to switch the input / output level for the doorphone, and the analog switch (a) of the switch unit 12 is operated to connect the doorphone 1 and the hands-free call unit 13 to talk on the next route. can do. Intercom 1 (DH1) -10-11-12 (a) -13 As described above, the voice control unit VCU of the hands-free communication unit 13 switches the call between the extension telephone and the intercom, so that the extension telephone and the hands-free communication unit are switched. Calls,
Alternatively, the correction of the call level between the door phone and the hands-free call unit can be automatically adjusted.

Next, another invention will be described. The above-mentioned means enables a telephone call between the telephone line and the hands-free communication unit 13. Then, the CPU unit 16
In the same manner as described above, the bells of all the extension telephones T1 to T4 connected to the extension terminals EXT1 to EXT4 are caused to ring, the voice switch VCU of the hands-free communication unit 13 is controlled, and a ringing tone is transmitted from the speaker SP. When the response button mounted on the hands-free communication unit 13 is pressed, the CP
The U unit 16 detects that the response button has been pressed, and
4 to stop the bells of all the extension telephones T1 to T4 connected to the extension terminals EXT1 to EXT4, and control the voice switch VCU of the hands-free communication unit 13 to switch the input / output level for the telephone line. By operating the analog switch (d) of the switch unit 12, the telephone line and the hands-free communication unit 13 are connected, and a call can be made on the next route. Telephone line-CO1-15-12 (D) -13

[0012]

As described above, the call level of the intercom 1 and the intercom 2 is adjusted by the 2-4 line conversion unit, and the call level between the extension telephone, the intercom and the telephone line and the hands-free call unit is adjusted. The use of the hands-free communication unit reduces variations in each communication level, thereby greatly improving the communication quality.

[0013]

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a detailed circuit diagram of a 2-4 line conversion unit in FIG. 1;

[Explanation of symbols]

CO1, CO2: external line terminals for accommodating telephone lines EXT1, EXT4: extension terminals for accommodating telephones and the like DH1, DH2: intercom terminals for accommodating intercom 1 and intercom 2 10: intercom interface unit 11: 2 -4 wire conversion section 12: switch section 13: hands-free communication section 14: extension circuit section 15: external line interface circuit section 16: CPU section HYB1 to HYB3: hybrid circuit section AMP1, AMP2: amplifier VCU: voice control unit section SP: Speaker MC: Microphone

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04Q 3/58 101 H04Q 3/58 101 F term (Reference) 5K027 AA08 AA09 BB03 DD16 HH03 JJ03 JJ07 KK04 5K038 AA07 CC12 DD02 DD03 DD22 EE02 EE12 FF01 FF10 5K049 AA14 BB04 BB10 BB12 BB18 BB22 CC01 CC04 FF01 FF37 GG04 5K050 AA01 BB06 BB11 CC09 DD30 EE09 EE17 EE23 FF09 FF15 HH03

Claims (2)

[Claims] 1. A telephone exchange device accommodating a plurality of extension telephones and a plurality of doorphones, and having a hands-free communication unit with the extension telephones and the doorphones, an interface unit capable of receiving a call from the doorphones and calling a doorphone, the doorphones -Line conversion unit capable of switching and controlling the input / output level of the telephone, a switch unit for interconnecting the extension telephone, the doorphone, and the hands-free communication unit, and voice input / output of the doorphone via the 2-4 line conversion unit. A call level control method in a telephone exchange, comprising: a hands-free call section capable of controlling a level and a voice input / output level from an extension telephone, and controlling a call level of each device. 2. A telephone exchange apparatus capable of accommodating a telephone line, a plurality of extension telephones, and a plurality of doorphones, and having a hands-free communication unit between the telephone line, the extension telephone, and the doorphone. Interface unit, 2-4 wire conversion unit capable of switching and controlling the input / output level of the intercom, switch unit for interconnecting the telephone line, extension telephone, intercom, and handsfree call unit, 2-4 wire conversion unit A hands-free communication unit that can control the voice input / output level of the intercom, the voice input / output level from the extension telephone, and the voice input / output level from the telephone line, and control the voice level of the respective devices. A call level control method for a telephone exchange device.