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Guardian Telecom Inc.
Installation and Operation
SCR-A Series
Page 9
Engineering Specifications
ELECTRICAL PERFORMANCE
AUDIBLE RANGE FREQUENCY RESPONSE 300 – 3400 HZ
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 MAX
RINGER EQUIVALENCE 0.5
SET IMPEDANCE 600 OHMS NOMINAL
MAXIMUM LOOP 15,000 FEET (4,600 METERS) OF 22 AWG COPPER
ELECTRICAL REQUIREMENTS
RINGER SENSITIVITY 40 – 100 V, 16 – 25 HZ
LINE VOLTAGE 24 – 56 VDC
LOOP CURRENT 20 - 120 MA
CONNECTION METHOD SURGE ARRESTOR / TERMINAL BLOCK
ENVIRONMENTAL
WEATHERPROOF ENCLOSURE NEMA 3R
TEMPERATURE -40
O
TO +50
O
C
MECHANICAL
HOOK SWITCH (CRADLE SWITCH) LIFE >1 000 000 OPERATIONS
BODY CONSTRUCTION 16 GAUGE STEEL, ZINC DICHROMATE PLATED AND
POWDER COATED
DIMENSIONS 9 X 5 X 5.2 INCHES (229 X 127 X 132 MM)
NET WEIGHT 4 LBS (1.82 KG)
HANDSET MATERIAL HIGH IMPACT ABS
MICROPHONE NOISE REDUCING ELECTRET
OPTIONAL MICROPHONE NOISE CANCELING DYNAMIC
RECEIVER HEARING AID COMPATIBLE
STANDARD MOUNTING VERTICAL WALL
CONNECTION FITTINGS 7/8” DIAM. OPENING FOR OWNER SUPPLIED FITTING
HARDWARE MATERIAL STAINLESS STEEL
COMPLIANCES
ACA N14510
INDUSTRY CANADA 1012 6721 A
FCC HQHCAN-22517-TE-E