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Guardian Telecom Inc.
Installation and Operation
Model WRT-A
Page 8
Engineering Specifications
*ELECTRICAL PERFORMANCE
AUDIBLE RANGE FREQUENCY RESPONSE 300 – 3400 HZ
DIALING METHOD DTMF OR 33/66 PULSE AT 10 PPS
SEND LOUDNESS RATING (SLR) dB SHORT 8 dB +/- 4 dB
RECEIVE LOUDNESS RATING (RLR) dB SHORT -4 dB +/- 4 dB
SIDE TONE MASKING RATING (STMR) >11 dB
RINGER OUTPUT 75 dB MAXIMUM
RINGER EQUIVALENCE 0.5
SET IMPEDANCE 600 OHMS NOMINAL
MAXIMUM LOOP 15,000 FT (4,600 M) OF 22 AWG COPPER
ELECTRICAL
RINGER SENSITIVITY 40 – 100 V, 16 – 25 HZ
LINE VOLTAGE 24 – 56 VDC
LOOP CURRENT 20 - 120 mA
CONNECTION METHOD
S
URGE ARRESTOR / TERMINAL BLOCK
FUSE ¼ AMP 250 VOLT 3AG FAST BLOW
ENVIRONMENTAL
WEATHERPROOF ENCLOSURE NEMA 3R
TEMPERATURE -40
O
TO +60
O
C (-40
O
TO +140
O
F)
HUMIDITY 0 TO 95% RH
DUSTPROOF FULLY GASKETED FACEPLATE & WEATHERPROOF KEYPAD
CORROSION RESISTANT MIL-STD-810E SALT FOG
MECHANICAL
HOOK SWITCH (CRADLE SWITCH) LIFE >1 000 000 OPERATIONS
BODY CONSTRUCTION
GE V
ALOX 357
®
ENGINEERING POLYMER
DIMENSIONS 12 X 9.6 X 3.9 INCHES (305 X 245 X 99 MM)
NET WEIGHT 6.5 LBS (2.95 KG)
HANDSET MATERIAL HIGH IMPACT ABS
MICROPHONE NOISE REDUCING ELECTRET
OPTIONAL MICROPHONE NOISE CANCELING DYNAMIC
RECEIVER HEARING AID COMPATIBLE (HAC)
STANDARD MOUNTING VERTICAL WALL
WIRING ACCESS 7/8” DIAM. OPENING FOR OWNER SUPPLIED FITTING