Nortel Networks 1000 - Manual (Page 691)

Electrical specifications 691
Table 258
DX signaling - incoming calls with originating party release on tandem connections (cont’d.)
Condition
Current in
signaling lead State of trunk
detector
If no-answer supervision is enabled, CO end
disconnects Current flow Low
Originating end disconnects – network torn
down and trunk idled No current flow High
Note: * – CO ground start: the trunk is idled and the network taken
down, but the incoming tie trunk is controlled by the originating end.
Electrical specifications
This section lists the electrical specifications for the E and M Trunk card.
This section lists the electrical specifications for the E and M Trunk card.
The electrical characteristics of all trunk circuits are provided in Table 260
"Electrical characteristics of trunk cards" (page 692) .
Table 259 "Electrical characteristics of E and M Trunk cards" (page
691)
lists the electrical characteristics of the trunk interface on the E and M
Trunk card.
Table 259
Electrical characteristics of E and M Trunk cards
Characteristic 4-wire trunk 2-wire trunk
Signaling range Type I#160;#160; 150 ohms
#160;#160; #160;#160; Type
II#160;#160; 300 ohms loop Type I#160;#160; 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 3 /
4
ˇ
S20K 3 /
4
Effective loss See pad table ( Table 280 "Pad
switching algorithm" (page
709)
)
See pad table ( Table 280 "Pad
switching algorithm" (page
709)
)
Terminating impedance 600 ohms 600 ohms
Balance impedance N/A 600 ohms
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.