Computer Hardware Installation Guide

774 NT8D15 E and M Trunk card
Characteristic
4-wire trunk 2-wire trunk
Far-end battery –42 to –52.5 V dc –42 to –52.5 V dc
Near-end battery –42.75 to –52.5 V dc –42.75 to –52.5 V dc
Ground potential difference ±10 V dc ±10 V dc
Line leakage between E lead
and ground
ˇ
S20K ohms
³20K ohms
Effective loss See pad table
(Table 307 "Pad switching
algorithm" (page 792))
See pad table
(Table 307 "Pad switching
algorithm" (page 792))
Terminating impedance 600 ohms 600 ohms
Balance impedance N/A 600 ohms
Power requirements
Table 289 "Power requirements" (page 774) lists the power requirements
for the E and M Trunk card.
Table 289
Power requirements
Voltage Tolerance Max current
+15.0 V dc
±5%
200 mA
–15.0 V dc
±5%
200 mA
+8.5 V dc
±2%
200 mA
–48.0 V dc
±5 %
415 mA
Table 290 "Power requirements" (page 774) lists the power requirements
for the E and M Trunk card.
Table 290
Power requirements
Voltage Tolerance Max current
+15.0 V dc
±5%
200 mA
–15.0 V dc
±5%
200 mA
+8.5 V dc
±2%
200 mA
–48.0 V dc
±5 %
415 mA
Table 290 "Power requirements" (page 774) lists the power requirements
for the E and M Trunk card.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright © 2003-2008, Nortel Networks
.