Nortel Networks 1000 User Manual

Page 594

594

NT8D14 Universal Trunk card

Table 207
Universal trunk card - trunk interface electrical characteristics (cont’d.)

Trunk Types

Characteristic

CO / FX / WATS

DID / TIE

RAN

Paging

Line leakage

S 30k ohms,
tip-to-ring,
tip-to-ground,
ring-to-ground

N/A

AC induction rejection

10 V rms,
tip-to-ring,
tip-to-ground,
ring-to-ground

N/A

Note 1: Selected in software.

Note 2: Selected by jumper strap settings on card. Refer to

Table 224 "Jumper strap settings -

factory standard (NT8D14BA, NT8D14BB)" (page 607)

Table 225 "Jumper strap settings - extended

range (NT8D14BA, NT8D14BB, NT8D14BB)" (page 608)

, and

Table 226 "Trunk types - termination

impedance and balance network (NT8D14BA, NT8D14BB)" (page 608)

for details.

Note 3: For loop extender application, the maximum voltage applied between tip and ring is –105 V
±5%. The minimum dc loop resistance for this type of application is 1800 ohms.

Table 208 "Universal trunk card - trunk interface electrical characteristics"
(page 594)

gives the electrical characteristics of the NT8D14 Universal

Trunk card.

Table 208
Universal trunk card - trunk interface electrical characteristics

Characteristic

CO/FX/WATS
trunks

DID or TIE
trunks

RAN
trunks

Paging
trunks

Terminal impedance

600 or 900 ohms (Note 1)

600/900
ohms
(Note 1)

600
ohms

Balance impedance

600 or 900 ohms (Note 1),
3COM, or 3CM2 (Note 2)

N/A

Supervision type

Ground or
loop start
(Note 3)

Loop start
(with ans sup)
(Note 3)

Contin
uous,
level, or
pulse

N/A

DC signaling loop length
(max)

1700-ohm loop with
near-end battery of
–42.75 V

2450-ohm loop
with near-end
battery of –44 V

600/90
0-ohm
loop

600 ohm loop

Far-end battery

–42 to –52.5 V (Note
4)

–42 to –52.5 V

–42 to
–52 V

N/A

Minimum detected loop
current

20 mA

10 mA

N/A

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311

02.06

Standard

27 August 2008