774 NT8D15 E and M Trunkcard
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 potentialdifference ±10 V dc ±10 V dc
Line leakage between E lead
and ground ˇ
S20K ohms ³20Kohms
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
Table289 "Power requirements" (page 774) lists the power requirements
for the E and M Trunkcard.
Table289
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 % 415mA
Table290 "Power requirements" (page 774) lists the power requirements
for the E and M Trunkcard.
Table290
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 % 415mA
Table290 "Power requirements" (page 774) lists the power requirements
for the E and M Trunkcard.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright© 2003-2008, Nor tel Networks
.