Avaya 1000 Series, Справочник, Страница: 417 / 700

Table 170: Universal trunk card - trunk interface electrical characteristics
Trunk Types
Characteristic CO / FX / WATS DID / TIE RAN Paging
Terminal impedance 600 or 900 ohms
(Note 1) 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) 600 or 900 ohms
(Note 1),
3COM, or 3CM2
(Note 2) N/A N/A
Supervision type Ground or loop
start (Note 3) Loop start (with
ans sup)
(Note 3) Continuous,
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 600/900-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 10 mA N/A
Ground potential
difference ±3 V ±3 V ±1 V ±1 V
Low DC loop
resistance during
outpulsing <300 ohms N/A N/A N/A
High DC loop
resistance Ground start Š
30k ohms;
loop start Š 5M
ohms N/AŠ N/A N/A
Ring detection 17 to 33 Hz 40 to
120 V rms N/A N/A N/A
Line leakage Š 30k ohms, tip-
to-ring, tip-to-
ground, ring-to-
ground Š 30k ohms, 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 10 V rms, tip-to-
ring, tip-to-
ground, ring-to-
ground N/A N/A
Note:
Selected in software.
Electrical specifications
Circuit Card Reference July 2011 417