Nortel Enterprise 1000 Reference Manual page 73

Figure 26
Two-way, loop DR, tie trunk call states – outgoing call through far-end PBX to CO
Note 1 : Immediate-start outpulsing.
Note 2: Delay-dial or wink-start outpulsing after go signal.
Note 3: Where no far-end answer supervision is provided, party at near-end
hangs up after recognizing far-end call termination.
Succession Communication Server for Enterprise 1000 Circuit Card Reference Guide
Analog Trunk Cards - NT8D14 Universal Trunk Card
Succession CSE 1000
Ground on tip,
battery on ring
Battery-ground
or loop pulses,
or DTMF
Idle
Near-end
originates
Near-end
hangs up
(Note 3)
(near-end)
Low-resistance
loop
Near-end
disconnects
first
Far-end
(Note 1)
answers
(no ans sup)
(Note 2)
Dial
tone
Go
Far-end
(Note 2)
answers
Stop
(ans sup)
Universal service
provided by far
end PBX if
originating end is
senderized
Page 73 of 236
High-resistance
loop
Near-end
disconnects
Far-end
disconnects
Far-end
disconnects
first
Near-end
disconnects
first
553-CSE6250