Avaya Nortel Communication Server 1000 Reference page 417

Table 170: Universal trunk card - trunk interface electrical characteristics
Characteristic
Terminal impedance 600 or 900 ohms
Balance impedance
Supervision type
DC signaling loop
length (max)
Far-end battery
Minimum detected
loop current
Ground potential
difference
Low DC loop
resistance during
outpulsing
High DC loop
resistance
Ring detection
Line leakage
AC induction
rejection
Note:
Selected in software.
Circuit Card Reference
CO / FX / WATS DID / TIE
600 or 900 ohms
(Note 1) (Note 1)
600 or 900 ohms 600 or 900 ohms
(Note 1), (Note 1),
3COM, or 3CM2 3COM, or 3CM2
(Note 2) (Note 2)
Ground or loop Loop start (with
start (Note 3) ans sup)
(Note 3)
1700-ohm loop 2450-ohm loop
with near-end with near-end
battery of –42.75 battery of –44 V
V
–42 to –52.5 V –42 to –52.5 V
(Note 4)
20 mA 10 mA
±3 V ±3 V
<300 ohms N/A
Ground start Š N/AŠ
30k ohms;
loop start Š 5M
ohms
17 to 33 Hz 40 to N/A
120 V rms
Š 30k ohms, tip- Š 30k ohms, tip-
to-ring, tip-to- to-ring, tip-to-
ground, ring-to- ground, ring-to-
ground ground
10 V rms, tip-to- 10 V rms, tip-to-
ring, tip-to- ring, tip-to-
ground, ring-to- ground, ring-to-
ground ground
Trunk Types
RAN
600/900 ohms
(Note 1)
N/A
Continuous,
level, or pulse
600/900-ohm
loop
–42 to –52 V
10 mA
±1 V
N/A
N/A
N/A
N/A
N/A
Electrical specifications
Paging
600 ohms
N/A
N/A
600 ohm
loop
N/A
N/A
±1 V
N/A
N/A
N/A
N/A
N/A
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