Nortel Networks 1000 - Manual (Page 597)

Electrical specifications 597
Table 210
Universal Trunk Card electrical characteristics (cont’d.)
Characteristic DID trunk CO trunk
Signaling range 2450 ohms 1700 ohms
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 600) See “PAD switching” (page 600)
Power requirements
Power to the NT8D14 Universal Trunk card is provided by the module
power supply (ac or dc).
Table 211
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 212 "Power requirements" (page 597) lists the power
requirements for the universal trunk card.
Table 212
Power requirements
Voltage Tolerance Current (max.)
+15.0 V dc ±5% 306 mA
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.