Owner's manual

ManualsBrandsNortel Networks ManualsVideo surveillance systems1000

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692 NT8D15 E and M Trunk card

Table 260

Electrical characteristics of trunk cards

Characteristic

DID Trunk

CO trunk

Nominal impedance 600 or 900 ohms, (selected by

software)

600 or 900 ohms, (selected by

software)

Signaling range 2450 ohms 1700 ohms

Signaling type Loop Ground or loop start

Far-end battery -42 to -52.5 V -42 to -52.5 V

Near-end battery N/A -42.75 to -52.5 V

Minimum loop current N/A 20 mA

Ground potential difference + 10 V + 3 V

Low DC loop resistance during

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

Line leakage Equal to or greater than 30 kS

(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)

Effective loss See pad table See pad table

Table 261 "Electrical characteristics" (page 692) lists the electrical

characteristics of the trunk interface on the E and M Trunk card.

Table 261

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

S20K

³20K

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

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311 02.06 Standard

27 August 2008