ATT DEFINITY Communications System Generic 3 Pocket Reference Instructions Manual

POWER UNITS
POWER UNITS
631DA1 Power Unit
Provides +5 volt DC 60-amp power on the backplane on the control
carrier and the port carriers.
631DB1 Power Unit
Provides -48 volt DC 8-amp and -5 volt 6-amp power on the back-
planes of the carriers.
644A1 Power Unit
Provides +5 volt DC 60-amp power on the backplane on the control
carrier and the port carriers of -48 volt DC powered cabinets.
645B1 Power Unit
Provides -48 volt DC 8-amp and -5 volt DC 6-amp power on the
backplanes of the carriers of -48 volt DC...

POWER UNITS
TN755B Power Unit
Supports applications requiring neon message waiting lamps.
676B Power Unit
Provides +5 volt DC power, -5 volt DC power, -48 volt DC power,
+12 volt DC power, and ringing voltage for -48 volt DC powered
single-carrier cabinets.
87 

DUPLICATION OPTION
DUPLICATION OPTION
G3iV2, the Duplication Option provides:
lA duplicated control carrier (multicarrier cabinet) or a
duplicated control cabinet (single-carrier cabinet) that
houses a second Switch Processing Element (SPE). The
SPE includes the following:
—  Processor Circuit Pack TN773
—  Network Control Circuit Pack TN777B
—  Packet Control Circuit Pack TN778 (G3V2)
—  Memory Circuit Pack(s) TN770
Power source to the fans from both the control carrier
and duplicated control carrier....

DUPLICATION OPTION
 l
 lPort networks interconnected by single cables
Duplicate switch node circuit packs in the switch node
carrier
In a fully-duplicated G3rV2 system, there is also, in addition to the
items mentioned for the G3iV2 system, a CSS.
89 

ENVIRONMENTAL REQUIREMENTS
ENVIRONMENTAL REQUIREMENTS
(Multicarrier Cabinet)
CABINET
Fully Loaded 5-Carrier (PPN or EPN)
HEAT DISSIPATION
8000 BTU/HR
5000 BTU/HR
AC POWER REQUIREMENTS
120 volts
60Hz
208 volts (3-wire)
60Hz
208/240 volts (4-wire)
60Hz
DC POWER REQUIREMENTS800 Lbs
70”x32”x28”
Fully Loaded 5-Carrier
Average 5-Carrier
50 Amps MCC
30 Amps MCC
25 Amps MCC
-48 volts
75 Amps
TEMPERATURE/ROOM HUMIDITY RANGE
40° To 120°F.
10% to 95% Relative Humidity at 84°F
10% to 45% Relative Humidity at 110°F...

ENVIRONMENTAL REQUIREMENTS
Each Port or Expansion125 Lbs19”x27”x22”
HEAT DISSIPATION
6800 BTU/HRFully Loaded 4-Cabinet
System (requirements
are same for PPN and
EPN)
1700 BTU/HRAverage for a Single
Cabinet
AC POWER REQUIREMENTS
120 volts 50-60Hz
15 Amps1-Cabinet System
120 volts 50-60Hz   Two 15 Amps or 20 Amps
2-Cabinet System
120 volts 50-60Hz   Three 15 Amps or 20 Amps
3-Cabinet System
and 15 Amps
120 volts 50-60Hz   Two 15 Amps and 20 Amps
4-Cabinet System
or Two 20 Amps
DC POWER REQUIREMENTS
-48...

MAXIMUM CABLING DISTANCES
MAXIMUM CABLING DISTANCES
Equipment24-Gauge Wire26-Gauge Wire
(0.5106 mm)
(0.4049 mm)
FeetMetersFeetMeters
Attendant console (301A)
2400732
1500457
Enhanced attendant console (302A)
With selector console
Phantom powered
Locally powered
Without selector console
Phantom powered
Locally powered800
5000
1400
5000244
1524
427
1524500
3400
900
3400
2200152
1037
274
1037
510D or 515 terminals
3000914
670
513, 610 BCT, or 615 MT, 4410 or 4425
terminals ( see also “data module” or
“EIA...

MAXIMUM CABLING DISTANCES
Equipment
EIA interface (data line circuit
pack and ADU):
19.2 kbps
9.6 kbps
4.8 kbps
2.4 kbps
1.2 kbps
0.3 kbps
Voice terminals:
Analog
8-port circuit pack (TN742, TN769), on-premises or
out-of-building — same premises (notes 1 and 2)
500- or 2500- type (note 3)
7100 series
16-port circuit pack (TN746), on-premises only
— no out-of-building or bridging (note 1)
AT&T 500 or 2500 type terminals without adjuncts
16-port circuit pack (TN746B), on-premises or
out-of-building — same...

MAXIMUM CABLING DISTANCES
Equipment
Meters
ISDN (TN556) (note 5)
7500 series (point-to-point)
Termination resistor (3 feet)
Termination resistor (250 feet)
8503 Set
MET sets (TN735)24-Gauge Wire
(0.5106 mm)
Feet
1900
1600
1600
1000579
488
487
30526-Gauge Wire
(0.4049 mm)
Feet
1600
1300
1330
650
Meters
488
396
405
198
Notes:
1.
2.
3.
An out-of-building, same-premises, analog terminal instal-
lation requires a carbon block, gas tube, or equivalent
solid state device at each end of the interbuilding cable....

MAXIMUM CABLING DISTANCES
PPN CABINET TO EPN CABINET
MAXIMUM CABLING DISTANCES
The maximum length of the fiber-optic cable between the PPN
cabinet and the EPN cabinet is approximately 7.6 km (25,000 feet)
depending on installation requirements. The requirements that
determine the maximum fiber link distance for an installation are:
l
l
l
l
lThe mean loss and the length of the outside plant fiber
cable
The mean loss and the length of fiber cable shipped with
the cabinet (including any fiber riser cable)...