Nortel Circuit Card 311 Reference page 681

Characteristic
Signaling type
Far end battery
Near end battery
Minimum loop current
Ground potential difference + 3 V
Low DC loop resistance
during outpulsing
High DC loop resistance
Line leakage
Effective loss
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
+15.0 V dc
–15.0 V dc
+5.0 V dc
+8.5 V dc
–48.0 V dc
Power to the universal trunk card is provided by the module power supply
(ac or dc).
requirements for the universal trunk card.
Table 238
Power requirements
Voltage
+15.0 V dc
–15.0 V dc
+5.0 V dc
Copyright © 2003-2008, Nortel Networks
.
DID trunk
Loop start
- 42 to - 52.5 V
N/A
N/A
N/A
N/A
Equal to or greater than 30 kohms
(tip to ring, tip to ground, ring to
ground)
See"PAD switching" (page 684)
Tolerance
±5%
±5%
±5%
±2%
±5%
Table 238 "Power requirements" (page 681)
Tolerance
±5%
±5%
±5%
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Electrical specifications 681
CO trunk
Ground or loop start
- 42 to - 52.5 V
- 42.75 to - 52.5 V
20 mA
+ 3 V
< 300 ohms
Ground start equal to or greater
than 30 kohms; loop start equal
to or greater than 5 Mohms
Equal to or greater than 30 kohms
(tip to ring, tip to ground, ring to
ground)
See"PAD switching" (page 684)
Current (max.)
306 mA
306 mA
750 mA
450 mA
415 mA
lists the power
Current (max.)
306 mA
306 mA
750 mA