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The second party three party five party talkback system


             The second party three party five party talkback system:
                           Point to Point Telephone
Before using the intercom system, kindly Read product instructions carefully. Getting well understanding of the installation process and operation for the intercom, will help you operate the product well and keep the intercom in good working condition

Introduction:
Before using the intercom system,kindly Read product instructions carefully. Get well understanding of the installation process and operation of th eintercom,will help you operate the proudct well and keep the intercom in good working condition.
Reading the instruction carefully,Before the installation and operating the elevator intercom system,and And reserve it for future reference.
The elevator Intercom system will be applied to,such as elevator emergency or maintenance application.
The cage extension is installed in each compartment,and the hands-free extension is installed in the car top and pit machine
The host in the machine room is installed in the engine control room, control room, duty room. This intercom system features: with small noise, with loud&clear sound
The five parties intercom can be achieved. 

Operating Instructions:
Host call Extension: Pick up the Host’s handset, it will automatic dial the extension number.
Extension call Host: Press the button, it will automatic call the Host, pick up the Host’s handset to communicate.
Host1 call Host2: Pick up the handset of the Host1, then press the button, Host2 rings, pick up the handset to finish the conversation. 

Specification:
Working Voltage: DC12V             Operating Current: ≤300mA
Maximum Power Consumption: 2W      Noise Voltage: ≤1OmV
Communication Distance: ≤2000m    Ringing Level:≥7OdB
Working Condition:
- Ambient Temperature: -40℃∽60℃ Relative Humidity: 30%∽95%
- Ambient Noise: 60 dB   Line Number: double core line
- Description for the wire: single line resistance can't more than 50 Ohm.

Section area of conductor 0.3mm2 0.5mm2 0.75mm2 1mm2
Communication Distance ≤200m ≤500m ≤800m ≤1200m


 Wire requirements:
Require all connecting the kingdom line, multicore parallel lines can meet the general engineering requirements.  
When walking line and strong power line interference serious environmental mixed wiring, the shielding measures should be adopted to keep distance and take more than 30 cm. 
 Power supply:
the emergency alarm, talkback system have used vehicle with DC12V power supply only. Power "positive" and "negative" terminal meet in room host "+", "-" the terminal; Room host "R", "L" terminal respectively with the car extension, hands free extension "R", "L" terminal connections.          
 

The components and installation instructions:

Room host installation method: in the control cabinet wall or wall according to room host drill three mounting hole, the lagging bolted, receive good line then room host bolted to the backboard.  
 1.car extension installation method: in car control car panel drill four mounting hole, with bolt will car extension fixed in the control panel, flat, installation to reserve "microphone, speaker" sound transfer port.Then from room host and car extension pick good line, take good emergency call button connection;Then press the car panel "emergency call" button to test, check whether the speaker is good, if there is "buzz" is not the normal situation, the speaker and microphone should check whether there is be sealed phenomenon. 
2.hands free extension installation method: in car top or bottom pit wall drill three (or four) mounting hole, the lagging bolted, receive good line then room host bolted in the back, and then press the "call" key test speaker are in good condition. 


Talkback schematic diagram:


 Packing details:
1pcs in each inner CTN box,
size: 43.3 x 27.6 x 19.1   G.W: 4kg
4pcs in outer CTN box, size: 56.6 x 44.5 x42  G.W: 20.25kg
20GP: 3000PCS,  40GP: 6000PCS,  40HQ: 7000PCS