GAI-Tronics PHP400 Руководство по установке и эксплуатации - Страница 16
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Call termination
Induction loop (if
fitted)
Dialling and recall
mode
Monitored faults
and sensors
Parameters
configurable with
TMA
Monitoring method
Environmental limits
Temperature:
Relative Humidity
Ingress Protection
Physical characteristics
Casing material
Weight
Dimensions
Calls started from the hands-free telephone can terminate in one of
three ways:
•
Polarity reversal of DC feed
•
K-break (interruption of loop current > 50ms)
•
Call progress tone: a tone received on the line, in the frequency
range 280 – 550Hz, either:
o A continuous tone for 5s, or
o A repeated tone ("beep") for 5 identical repetitions.
Note that, for reliable operation, progress tone level should be
between -10dBm and -35dBm, measured at the help point.
Suitable for inductive coupling to Hearing Aids having a `T'
switch position. Supplementary power required.
MF only. TBR only.
•
Hookswitch
•
Brown out (power failure)
•
Call log full
•
4 auxilliary inputs (optional)
•
Autodial numbers - including time-switched alternate numbers
•
Speech receive level.
•
Rings before / after auto-answer
•
Time out (default 7 minutes)
•
Mute before dial
•
DTMF detection window
•
Remote polling (initiated by TMA)
•
Call-in (initiated by the telephone at a preset time)
Operating: -20ºC to +60ºC (-4°F to 140°F)
Storing: -40ºC to +70ºC (-40°F to 158°F)
Up to 95% (non-condensing)
IP65 to EN60529:1992 – Degrees of protection provided by
enclosures.
Mild steel, zinc coated and polyester powder coated
6.5kg (11lbs).
405mm diameter. 88mm depth. Buttons may protrude a further
10mm from front face.
PHP400 Analogue Help Point.
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