Owner's manual

Electrical specifications 693
Table 261 "Electrical characteristics" (page 692) lists the electrical
characteristics of the trunk interface on the E and M Trunk card.
Table 262
Electrical characteristics of the E and M Trunk interface
Characteristic
4-wire trunk 2-wire trunk
Signaling range Type I 150 ohms
Type II 300 ohms loop
Type I 150 ohms
Signaling type Type I, Type II Type I
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 281 "Pad switching
algorithm" (page 711))
See pad table
(Table 281 "Pad switching
algorithm" (page 711))
Terminating impedance 600 ohms 600 ohms
Balance impedance N/A 600 ohms
Power requirements
Table 263 "Power requirements" (page 693) lists the power requirements
for the E and M Trunk card.
Table 263
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 264 "Power requirements" (page 693) lists the power requirements
for the E and M Trunk card.
Table 264
Power requirements
Voltage Tolerance Max current
+15.0 V dc
±5%
200 mA
–15.0 V dc
±5%
200 mA
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.