Computer Hardware Installation Guide

Digital line interface specifications 519
The +15 V dc input is regulated down to +10 V dc for use by the digital
line interface circuits. The ±15.0 V dc inputs to the card are used to power
the loop interface circuits.
Electrical specifications
This section lists the electrical characteristics of the NT8D02 Digital Line
card.
This section lists the electr ical characteristic of the digital line card.
This section lists the electrical characteristics of the NT8D02 Digital Line
Card.
Digital line interface specifications
Table 195 "NT8D02/NTDK16 Digital Line card technical summary" (page
519) provides a technical summary of the digital line cards.
Table 195
NT8D02/NTDK16 Digital Line card technical summary
Characteristics
NT8D02 DLC
description
NTDK16BA DLC
description
NTDK16AA DLC
description
Units per card 16 voice, 16 data 48 voice, 48 data 48 voice, 48 data
Impedance
100 Ohm j/b ohm 100 Ohm j/b ohm 100 Ohm j/b ohm
Loop limits
30 m (100 ft) to 915
m (3000 ft) with 24
AWG PVC cable (+15
V DC at 80 mA)
30 m (100 ft) to 915
m (3000 ft) with 24
AWG PVC cable (±15
V DC at 80 mA)
30 m (100 ft) to 915
m (3000 ft) with 24
AWG PVC cable (±15
V DC at 80 mA)
0 to 1070 m (3500
ft) with 24 AWG PVC
cable (±15 V DC
at 80 mA)
0 to 1070 m (3500
ft) with 24 AWG PVC
cable (±15 V DC
at 80 mA)
0 to 1070 m (3500
ft) with 24 AWG PVC
cable (±15 V DC
at 80 mA)
Line rate
512 kbps ± 100 ppm 512 kbps ± 100 ppm 512 kbps ± 100 ppm
Power supply
+5VDC
±15 V DC
+10 V DC
+5VDC
±15 V DC
+5VDC
±15 V DC
+8 V DC
Transmitter output voltage:
• successive "1" bits
+1.5 ± 0.15 V and
-1.5 ± 0.15 V
• "0" bits
0 ± 50 mV
Additional circuitry
Not applicable Not applicable Power Failure Transfer
Control Ring Sync.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
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.