Nortel Networks Circuit Card 311 - Manual (Page 681)

Electrical specifications 681
Characteristic DID trunk CO trunk
Signaling type Loop start Ground or loop start
Far end battery - 42 to - 52.5 V - 42 to - 52.5 V
Near end battery N/A - 42.75 to - 52.5 V
Minimum loop current N/A 20 mA
Ground potential difference + 3 V + 3 V
Low DC loop resistance
during outpulsing N/A < 300 ohms
High DC loop resistance N/A Ground start equal to or greater
than 30 kohms; loop start equal
to or greater than 5 Mohms
Line leakage Equal to or greater than 30 kohms
(tip to ring, tip to ground, ring to
ground) Equal to or greater than 30 kohms
(tip to ring, tip to ground, ring to
ground)
Effective loss See "PAD switching" (page 684) See "PAD switching" (page 684)
Power requirements
Power to the NT8D14 Universal Trunk card is provided by the module power
supply (ac or dc).
Table 237
Power requirements for universal trunk card
Voltage Tolerance Current (max.)
+15.0 V dc ±5% 306 mA
–15.0 V dc ±5% 306 mA
+5.0 V dc ±5% 750 mA
+8.5 V dc ±2% 450 mA
–48.0 V dc ±5% 415 mA
Power to the universal trunk card is provided by the module power supply
(ac or dc).
Table 238 "Power requirements" (page 681) lists the power
requirements for the universal trunk card.
Table 238
Power requirements
Voltage Tolerance Current (max.)
+15.0 V dc ±5% 306 mA
–15.0 V dc ±5% 306 mA
+5.0 V dc ±5% 750 mA
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
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.