Page 586 of 894 NT8D14 Universal Trunk card
553-3001-211 Standard 2.00 September 2004
Figure 130
Two-way, loop DR, TIE trunk call states – outgoing call through far-end PBX to CO/FX/WATS
System (near) end
Far end
High-resistance
loop
Ground on tip,
battery on ring
Ground on tip,
battery on ring
Battery on tip,
ground on ring
Battery-ground
or loop pulses,
or DTMF
Near end
originates Dial
tone
Idle
Near end
hangs up
(Note 3)
Near end
disconnects
first
Near end
disconnects
first
Near end
disconnects
Far end
disconnects
Far end
disconnects
first
Far end
answers
(no ans sup)
Far end
answers
(ans sup)
Universal service
provided by far
end PBX if
originating end is
senderized
553-1144
Low-resistance
loop
(Note 1)
(Note 2)
(Note 2)

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.
Go
Stop