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Industrial Multi-Party Paging System PA3
Industrial Multi-Party Paging System PA3
Product model: PA3

PAGA system PA3(1)
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Industrial Duplex Multi-Party Paging Broadcasting System Uer

                  Chapter 1 System Introduction


1.1 System Features
The “Multi-Party Talk” Paging system PA3 is designed for communication in
industrial environments.
A: It is suitable for high noise, corrosive atmospheres, hazardous areas and
extremes of temperature, dust and humidity create hostile environments.
B: The “Multi-Party Talk” system have two operations: the first one is group
calling through pick-up handset and pressing one button to auto-dial; The
other one is two-way private intercom in one line or more two-way groups
calling and can be allowed up to 99 persons communication at most.
C: The system also can be connected to external network, and the extension
can call other phones outside of the network.
1. To initiate communication or broadcast over the system to all other station,
the operator at one of the station lifts the handset from the cradle, presses
* to call and speak to all the other party.
2. All the stations rings and auto-answers. All the other user at all other
station can joins the conversation by lifts the handset and speaking into
the handset. The system allows all party simultaneous conversation
without cross-talk or interference. After conversation each station will auto
off to release the line.
3. To initiate communication or broadcast to one of the other station, the
operator at one of the station lifts the handset from the cradle, presses ID
number (extension number) which you want to call, and speak to them.
After conversation each station will auto off to release the line.

 Hand in hand cable connection to save cable
 Two-way, all-party communication
 Wall mount, desktop, models
 Indoor, outdoor and hazardous location models
 Center power supply (all in one) available in 110VAC~ 230VAC within
Distance Maximum to 7KM within 30 extensions
 If over 30 extensions and over 7KM, each station need AC power supply
110VAC~ 230VAC
 Automatic broadcasting with 8W loud speaker
 Analogue system auto answer and auto stop
 Self healthy check
 LCD display for caller ID and the dialing number.
 Last number repeat dial
 ID number programmable
 2 speed dialing keys

1. Robust SMC die-cast body, vandal resistant and tamper resistant
2. Weather resistant to IP66 standard, service temperature range from:-35℃
to +75℃
3. Magnetic reed hook-switch
4. Cable line powered. No external power or battery back up required.
5. Lightening protection to ITU-T recommendation K.21
6. Handset: made of special SMC, high anti-knock resistance, Weatherproof,
armored cable optional,
7. Hearing Aid compatible receiver
8. Extension integrity wiring to enable the other station to check if the
telephone unit is still operational for Self healthy checking
9. 7 minutes time out
10. Easy installation/ replacement

Popular applications include oil and gas platforms, nuclear power plants,
shipbuilding, chemical plants, oil refineries, steel company, subway tunnels,
and other large infrastructure projects
1.2 system composition
It is comprised of wall mount telephone station, desk telephone
station, IIC explosion proof user telephone, outline telephone station,
unidirectional broadcast telephone station, line equalizer,
communication cable, AC 220V powered, etc.
1.3 System Power Supply
AC 220V centralized power.
1.4 Telephone station type
Indoor wall mount telephone station outdoor wall mount telephone
station desk telephone station, IIC explosion proof user telephone, outline
telephone station, unidirectional broadcast telephone station.
1.5 Telephone station Capacity
Telephone station Capacity system: 2 99.
1.6 Transmission distance
Systems for the effective transmission distance: 26Km .


Chapter 2 Technical characteristics
2.1 Using Environmental conditions
 Environment temperature -30℃ +70℃ (outside wall mounting
telephone station)
 -10℃ +35℃ (inside desk mounting telephone station)
 Relative humidity ≤90
 Environmental noise ≤110dB (outside wall mounting telephone station)
 Barometric pressure 70Kpa 106Kpa
2.2 Main Features
Broadcasting Feature
There are 3 to 6 channel. After pick up the hook;
1.press L1 +outline number:calling out ling。
2.press L2 or L3, press #+ID number: single calling(calling by one to
3. Press L2 or L3, press #+99999: whole calling.
4. Press L2 or L3, press #+ group number: group calling
5. Press L2 or L3, press speed dial number at least three second. When
hear the dial tone can release the button.
Open broadcast system function to make a broadcast call,
2.2.1 Duplex call
After the called user pick up the hook. Caller can make a duplex calling
through the handle microphone or press the hands-free button.
2.2.2 Channel switching
After the called user pick up the hook. Caller can make a duplex calling
through the handle microphone.
2.2.3 Channel switching
Rotary Switches operate 3 6 communication channel selection.
2.2.4 Boardcasting mute setting
Maintainer can setting the call volume via the mute switch on the
2.2.5 Using PSTN to make outline telephone communication
Outline user can make a boardcasting calling and communication via
outline telephone station to PSTN.
2.2.6 Expansion easy to use
Each station works independently. All the telephone station work via 8-
14 core cable in parallel. If any one station failure does not affect the
normal operation of other user stations. Users can according demand to
expand station or relocation. It’s unlimited.
2.3 The Main Index
2.3.1 Working power supply
Power voltage:AC 220V±10% 50Hz±5% .
Power Static state ≤3W, Dynamic time for desk telephone station
≤10W, wall mounting telephone station≤25W.
2.3.2 Communication Channel
 Out up:RMS: 2V (Load impedance 33Ω)
 Output amplitude limits: RMS: 1.5V (Load impedance 33Ω)
 Gain: 70dB Adjustable over
 Frequency response: 250-5500Hz±3dB
 Distortion degree: ≤5 , 1000Hz
2.3.3 Desk type telephone station boardcasting part
 Output amplitude: 2W (Load impedance 8Ω)
 Gain: normality 50dB, The adjustment range (40-68dB)
 Frequency response: 250-5500Hz±3dB
 Distortion degree: ≤5 (Test frequency: 1000Hz, Output amplitude: 3W)
 Input impedance: 50KΩ
 Output impedance: 8-16Ω
2.3.4 The parts of outdoor wall-mounted telephone station broadcasting.
 Output amplitude: 15W (load impedance 8Ω / 16Ω);
 Gain: Normal 58dB, adjustable range (40 ~ 68 dB);
 Frequency response: 250 ~ 5500Hz ± 1.5dB;
 Distortion: ≤5% (test frequency: 1000Hz, the output amplitude: 12W);
 Input impedance: 50KΩ;
 Output Impedance: 8 ~ 16Ω.
2.4 System transmission distance
System transmission distance of the system effective transmission distance:
2.5 The number of channels
The system has one broadcast channel, Five call channels, you can
choose the communication channel by turning the switch of the call
station, then up to 3 to 6 simultaneous calls to the user.at the same
2.6 Security
2.6.1 Dielectric strength
Then call station can withstand 50Hz, 1500V AC voltage without
breakdown and arcing phenomena
2.6.2 Insulation resistance
Then call station at room temperature, the insulation resistance of AC power
connector to the metal chassis equipment not less than 2MΩ.
2.6.3 Leakage Current
The leakage current of call station is less than 3.5mA.


Chapter 3 Structure
3.1 Desktop call station
The call station make up by the desk telephone and power junction
boxes, of which the telephone Dimensions: L: 250 (mm), W: 225
(mm), H: 115 (mm), the power junction box Dimensions L: 210 (mm),
W: 305 (mm), H: 125 (mm), As Figure 1.
The telephone can external connect a 5W speaker if needed.


3.2 Indoor wall mounted telephone
The call station make up by the indoor wall-mounted telephone and 15W
lound speacker, then wall mounted telephone Dimensions: L: 290 (mm), W:
185 (mm), H: 118 (mm), As Figure 2.

3.3 Outdoor wall-mounted telephone station
Consisted by the indoor wall-mounted telephone,protective box and 15W
speaker. Protective box Dimensions: L: 400 (mm), W: 300 (mm),H: 150
(mm), Dimensions
shown in Figure 3.

3.4 Outside line telephone station
3.5 Cable junction box
We have 3 models,JB-3,JB-1,KNB11,with internal terminal plate,The
line has been completed in the internal connection,can be configured
according to site requirements,Dimensions shown in Figure 4.

Chapter4 Fitting and Adjustment
4.1 Installation requirements
4.1.1 Indoor wall-mounted telephone and Outdoor wall-mounted
telephone station
The bottom should be 1.25 meters above the ground when
installing,connected 15W speakers should be installed 2.5 meters above the
ground,shown in Figure 5.

4.1.2 Outside line telephone station
Outside line telephone station junction box will be installed in control room
be convenient for installation and maintenance.
4.1.3 Earth Wire
Indoor wall-mounted telephone station,Outdoor wall-mounted telephone
station,Power supply wiring box,Cable junction box,the metal shell to be
reliably grounded when installing.

4.2 Piping, cable laying
4.2.1To meet the industrial and mining complex, harsh field environments,th
e cable should be metal piping laying.
4.2.2 System uses special all shielded cable.
4.2.3 To avoid electromagnetic interference, the wiring on the cable
channel or cable tray, should avoid high-voltage, high-current, high
magnetic field environment. Implementation of the relevant provisions of
the communication cabling.
4.2.4 Using metal spring hose to connect cable pipes with terminal

4.3 system connection
4.3.1 On the cable before terminals work,the core wire which is connected
to the same terminal need to be compression joint by Y-shaped terminal or
round-shaped terminal to ensure good conductivity properties
4.3.2 Line sequence should be defined before connecting 8 to 14 core
cable, to ensure that each terminal are in line with pre- defined easy onsite
installation and future maintenance ;
4.3.3 System connection diagram shown in Figure 7 .

4.3.4 All the terminals power ground wire must be connected to the
grounding line when connected,as shown in Figure 8

4.3.5 Cable shield electromagnetic interference is mainly used to isolate the
site , should be connected in a single- grounded, Figure 9 Figure 9

4.3.6 System configuration diagram, Figure 10

4.4 Equipment commissioning
4.4.1 Adjustment after installing the desktop phone
Main volume adjustment after installing desktop phone Figure 11, which
adjust potentiometer clockwise to increase the volume.

Chapter 5 The Use and Operation
5.1 Desktop phone and wall-mounted phone
5.1.1 Call Status
User A calls user B, remove the hanset, the system enters the broadcast call
status, then all broadcast channels open, User A’s call can be heard through
the speakers.
5.1.2 Call state
User B hear the broadcast call, remove the handset, then talk with the user A
5.1.3 Hook state
After the call, hang up the call two sides, release the occupied channels, and
complete the entire operation. The phone possess automatic hang up
function, the caller hangs up first, automatically hang up after receiving called
hook signal, the user can also choose set six minutes limit call.
5.1.4 Broadcast volume adjustment
Control volume buttons on the keyboard '△ ▽' to adjust the volume.
5.2 Other
The use and installation of explosion-proof phone, wireless phone users,
external electrical and other telephone equipment, see the relevant
5.3 Repair and Maintenance
To protect the user's safety, please do not open a device cabinet to avoid
electric shock, not all components inside the device needs to be maintained.
If there is abnormal situation, please contact our company or the agency, we
will be happy to serve you.
5.4 Optional phone
Our company provide a variety of special telephone, customers can choose
the appropriate phone according to the actual needs, when there are special
needs, you can communicate with us, and customized the phone with
corresponding demand, welcome to visit our website
http://www.koontech.com to select all phones.


Explosion-proof phone KNEX1 Firefighting phone KNZD-46 Emergency