详情
Features:
1. Aluminum alloy die - cast body, Vandal resistant and
tamper-resistant
2. Full keypad with meomory, *0 button programmable speed-dial
telephone, Illuminated button optional.
3. Magnetic reed hook-switch
4. Telephone line powered.
5. Lightening protection to ITU-T K.*1
6. Handset: high anti-knock resistance, weatherproof, armoured
cable optional
7. Hearing Aid compatible receiver, Noise canceling
microphone.
8. Handset integrity
9. Selectable 7 minute time out
Technical parameter:
Ambient temperature: **0~**0°C
Defend grade: IP*6
Relative humidity: *0%***5%
Atmospheric pressure: *6~**6KPa
Circumstance noise: less than *0dB(A)
Sound level of ringing: >*0dB(A)
Standard frequency: **7. **0. **2. **1Hz
Call transmission index: (5KM)SLR<*2,RLR<*1,STMR>*0,
output impedance is **0 Ohm.
