Comdial G0408 Manual page 89

IMI66–107
Detailing The The Analog Terminal Interface Specifications
Power requirements:
Ringing voltage:
Battery feed voltage:
Loop current limits between ATI-D
and IST interface:
DC loop limits from ATI-D to
industry standard interface per port:
DC loop limits from ATI-D to voice
mail system:
Cable insulation resistance:
Cable requirement ATI-D to system
Cable terminations:
Dialing:
Ringing cadence:
Operating temperature:
Humidity:
Height:
Width:
Length:
Weight:
FCC registered and listed for safety compliance as part of digital telephone system
FCC certified, Part 15 (class A)
Supplied by the common equipment
55 VAC Nominal @ 20 Hz
(45 VAC minimum)
Power rated to maximum
REN = 2.0
24 VDC nominal
20 ma min. at 620 ohms
70 ma max. at 0 ohms
620 ohms maximum including interfaced telephony device.
(Approximately 4000 feet with #26 AWG twisted-pair cable
and 300 ohm device load.)
(Approximately 500 feet if two IST devices are connected in
parallel on same tip and ring pair.)
Approximately 1000 feet with #26 AWG twisted-pair cable.
30,000 ohms minimum
2-pair twisted cable; 25 feet maximum length. (Both common
equipment station ports must always be connected to the
ATI-D for every installation, and they must be paired in
sequence — 12 & 13, 14 & 15, etc.)
623-type, 4-conductor mini jacks
Industry-standard DTMF or Dial pulse (rotary) with nominal
make/break ratio of 40/60 @ 10 PPS
Outside calls = 2 second on -
4 seconds off
Intercom calls = Two bursts:
1 second on - .5 second off,
1 second on - 3.5 seconds off
32-122 F (0-50 C)
90 % relative, non-condensing
2.375 inches
8.062 inches
11.125 inches
4 lbs. (plus 2 lbs.
for packing material)
Digital Telephone System
Installing The DSU 2 – 59