Nortel Enterprise 1000 Reference Manual page 72

Page 72 of 236 Analog Trunk Cards - NT8D14 Universal Trunk Card
Figure 25
Two-way, loop DR, tie trunk call states – incoming call through a senderized, tandem PBX
from a CO
Note 1: Dial CO/FX/WATS and office DN.
Note 2: If ground start trunk, outpulse toward office after ground detection.
If loop start trunk, outpulse toward office 1 second later.
Note 3 : Pseudo-answer supervision is provided by near-end at expiration of
end-of-dial timer.
Note 4: Where no far-end answer supervision is provided, party at far-end
hangs up after recognizing near-end call termination.
553-3023-211 Standard 1.00 June 2001
Succession CSE 1000
Ground on tip,
battery on ring
Idle
Battery-ground
or loop pulsing,
or DTMF
(Note 1)
CO end
answers
(no ans sup)
Far-end
disconnects
first
Far-end
disconnects
Near-end
disconnects
(near-end)
Battery on tip,
ground on ring
Far-end
hangs up
(Note 4)
Far-end
originates
Near-end
stores
office DN
(Note 2)
CO/FX/WATS
ground start
disconnect
Near-end
answers
(ans sup)
(Note 3)
Far-end
disconnects
first
553-CSE6249