Telephone User Manual

Guardian Telecom Inc.
Installation and Operation
SCR Series
Page 8
Engineering Specifications
ELECTRICAL PERFORMANCE
AUDIBLE RANGE FREQUENCY RESPONSE 300 – 3400 HZ
TRANSMIT OBJECTIVE LOUDNESS RATING (TOLR) -38 +/- 3 dB
RECEIVER VOLUME ADJUSTMENT +8.1 / -5.1 dB IN STEPS OF 2.7 dB
RECEIVE OBJECTIVE LOUDNESS RATING (ROLR)
-AT NOMINAL VOLUME LEVEL 50 +/- 3 dB
-AT MAXIMUM VOLUME LEVEL 41.9 +/- 3 dB
-AT MINIMUM VOLUME LEVEL 55.4 +/- 3 dB
SIDE TONE OBJECTIVE LOUDNESS RATING (SOLR)
-AT NOMINAL VOLUME LEVEL 11 +/- 4 dB
-AT MAXIMUM VOLUME LEVEL 7 +/- 4 dB
-AT MINIMUM VOLUME LEVEL 14 +/- 4 dB
RINGER OUTPUT >75 dB
FCC RINGER EQUIVALENCE 0.8B
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 +60
O
C (-40
O
TO +140
O
F)
MECHANICAL
HOOK SWITCH (CRADLE SWITCH) LIFE >1 000 000 OPERATIONS
BODY CONSTRUCTION 16 GAUGE STEEL, ZINC DICHROMATE
PLATED AND POWDER COATED
DIMENSIONS (H x W x D) 9 X 5.0 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