The tunnel hole IP emergency telephones are fully contained within a corrosion-resistant staileness Still  weatherproof case with a door providing complete protection against dust and moisture ingress, resulting in a highly reliable product with a long MTBF. The unique robust handset is manufactured from molded Bulk Molding Compound and designed specifically to withstand arduous use in all environments, armored cord to provide additional resistance to vandalism or heavy industrial use. 

1) Transmission mode: single-mode fiber; TCP/IP (option)
2) Rated sound pressure level: ≧ 90DBA (40CM directly in front);
3) Call voice frequency band: 300Hz-8KHz;
4) Camera: ≥ 1.3 million pixels, which can effectively monitor the face image of the rescuer and the surrounding traffic environment; (option)
5) Occupies 1/2 IP address, can communicate across network segments and routes; (option)
6) Working voltage: AC220V ± 10%, access method: air circuit breaker;
7) One-touch calling hands-free calling;
8) Built-in splice box; Can reserve the installation position of the network switch; (option)
9) Broadcast voice frequency band: 100Hz-16KHz;
10) Amplifier control interface: Yes;
11) Installation method: column type, the installation position of the column chassis can be customized free of charge according to the project site;

(Telephone in tunnel)
(Telephone at Tunnel Entrance)

Main Function

1. Push-to-talk button.
2. Transmit basic information such as the local kilometer number and the up-down direction.
3. Unique address code for uploading to the control center, determining the call location, receiving calls, and detecting.
4. Full-duplex call.
5. Talk with any 2 emergency telephone extensions at the same time.
6. Able to accept the detection command issued by the console host, check the extension in time and send the detection result to the console host.
7. The failure or damage of any one or more emergency telephones shall not affect the communication between other emergency telephones and the console.
8. The extension can send out voice prompts automatically when calling to report the system working status.
9. Able to accept various calls from the console host and automatically release the circuit when the console hangs up.
10. The voice is clear, the voice is loud, and there is no feedback howling when talking.
11. When the extension is damaged (for example, the door is opened illegally) or the battery is under voltage or the line is faulty, the extension can automatically send an alarm message to the console host.
12. Can automatically enter the call and standby working state, reducing power consumption.


Specification

Our  emergency tunnel telephone  system has passed the product quality inspection of the Traffic Engineering Supervision and Inspection Center of the Ministry of Transport, and has a mass production certificate of traffic engineering products from the Traffic Engineering Supervision and Inspection Center of the Ministry of Communications.

Main technical performance indicators of extension
Voice frequency band 300 ~ 3400Hz
Rated sound pressure level intensity ≥95dBA; (measured at 40cm directly in front of the extension)
Extension working temperature ‘-40 ℃ ～ ＋ 60 ℃
Extension working humidity ≥95% (35 ℃)
Non-linear distortion ≤5%
Requirements for grounding resistance ≤10Ω
Working voltage DC 12V
Current roadside emergency telephone ≤ 45mA (standby state); ≤200mA (working state)
Optical signal transmission power ≥-6dBm (1310nm)
Optical signal receiving sensitivity ≤-40dBm (1310nm)
Mean time between failures (MTBF) ≥100,000 hours
Maximum allowable line attenuation 30dB (3000Hz)
Protection level IP65
Main technical performance indicators of console equipment
Single system control capacity ≥ 512 extensions
Voice frequency band 300 ~ 3400Hz
Call link non-blocking (all calls are not blocked)
Optical connector FC / PC
Call Connect Time ≤6 seconds
Working voltage AC 220V ± 10% 50Hz DC -52V ± 2V
Current Host equipment of control center ≤400mA
Optical signal transmission power ≥-6dBm
Optical signal receiving sensitivity ≤ -40dBm
Audio output resistance 600Ω
Working wavelength 1310nm or 1550nm
Power consumption ≤500W
Harmonic distortion <5% (1kHz)
Recording storage time ≥2000H
Maximum allowable optical cable line attenuation 30dBm (1310nm)
Working temperature 0 ℃ ~ 35 ℃ (central equipment)
Relative humidity 30% ~ 85% (central equipment)
Other technical performance indicators meet JT / T8200-93 standards
Working mode full duplex, two channels can be alarmed simultaneously
Other functions With test and remote-control functions.

Dimensions and Packing
Telephone with stands
Unit size: 680*1550*260mm;
Stand size: 1200*180*180mm; N.W.: 8.1kg; G.W.: 8.7kg