Nortel Networks 1000 - Manual (Page 693)

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
.