Nortel Networks 311 Manual Do Utilizador
678
NT8D14 Universal Trunk card
Trunk Types
Characteristic
CO / FX / WATS
DID / TIE
RAN
Paging
Line leakage
ˇ
S 30k ohms,
tip-to-ring,
tip-to-ground,
ring-to-ground
tip-to-ring,
tip-to-ground,
ring-to-ground
ˇ
S 30k ohms,
tip-to-ring,
tip-to-ground,
ring-to-ground
tip-to-ring,
tip-to-ground,
ring-to-ground
N/A
N/A
AC induction rejection
10 V rms,
tip-to-ring,
tip-to-ground,
ring-to-ground
tip-to-ring,
tip-to-ground,
ring-to-ground
10 V rms,
tip-to-ring,
tip-to-ground,
ring-to-ground
tip-to-ring,
tip-to-ground,
ring-to-ground
N/A
N/A
Note 1: Selected in software.
Note 2: Selected by jumper strap settings on card. Refer to
,
, and
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.
±5%. The minimum dc loop resistance for this type of application is 1800 ohms.
gives the electrical characteristics of the NT8D14 Universal
Trunk card.
Table 234
Universal trunk card - trunk interface electrical characteristics
Universal trunk card - trunk interface electrical characteristics
Characteristic
CO/FX/WATS
trunks
trunks
DID or TIE
trunks
trunks
RAN
trunks
trunks
Paging
trunks
trunks
Terminal impedance
600 or 900 ohms (Note 1)
600/900
ohms
(Note 1)
ohms
(Note 1)
600
ohms
ohms
Balance impedance
600 or 900 ohms (Note 1),
3COM, or 3CM2 (Note 2)
3COM, or 3CM2 (Note 2)
N/A
N/A
Supervision type
Ground or
loop start
(Note 3)
loop start
(Note 3)
Loop start
(with ans sup)
(Note 3)
(with ans sup)
(Note 3)
Contin
uous,
level, or
pulse
uous,
level, or
pulse
N/A
DC signaling loop length
(max)
(max)
1700-ohm loop with
near-end battery of
–42.75 V
near-end battery of
–42.75 V
2450-ohm loop
with near-end
battery of –44 V
with near-end
battery of –44 V
600/90
0-ohm
loop
0-ohm
loop
600 ohm loop
Far-end battery
–42 to –52.5 V (Note
4)
4)
–42 to –52.5 V
–42 to
–52 V
–52 V
N/A
Minimum detected loop
current
current
20 mA
10 mA
10 mA
N/A
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311
01.04
Standard
Release 5.0
23 May 2008
Copyright © 2003-2008, Nortel Networks
.