Nortel Networks 311 사용자 설명서
Electrical specifications
773
Characteristic
DID Trunk
CO trunk
Low DC loop resistance during
outpulsing
outpulsing
N/A
300 ohms
High DC loop resistance
N/A
Ground start equal to or greater
than 30 kS. Loop start equal to
or greater than 5 MS
than 30 kS. Loop start equal to
or greater than 5 MS
Line leakage
Equal to or greater than 30 kS
(Tip to Ring, Tip to GND, Ring
to GND).
(Tip to Ring, Tip to GND, Ring
to GND).
Equal to or greater than 30 kS
(Tip to Ring, Tip to GND, Ring
to GND)
(Tip to Ring, Tip to GND, Ring
to GND)
Effective loss
See pad table
See pad table
lists the electrical
characteristics of the trunk interface on the E and M Trunk card.
Table 287
Electrical characteristics
Electrical characteristics
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
ground
ˇ
S20K
1
/
2
³20K
1
/
2
Effective loss
See pad table (
)
See pad table (
)
Terminating impedance
600 ohms
600 ohms
Balance impedance
N/A
600 ohms
lists the electrical
characteristics of the trunk interface on the E and M Trunk card.
Table 288
Electrical characteristics of the E and M Trunk interface
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
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311
01.04
Standard
Release 5.0
23 May 2008
Copyright © 2003-2008, Nortel Networks
.