Nortel Networks Circuit Card 311 - Manual (Page 774)

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
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.