
Page 598 of 906
NT8D14 Universal Trunk card
553-3001-211 Standard 3.00 August 2005
Figure 133
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
Summary of Contents for Circuit Card
Page 2: ......
Page 4: ...Page 4 of 906 Revision history 553 3001 211 Standard 3 00 August 2005...
Page 18: ...Page 18 of 906 Contents 553 3001 211 Standard 3 00 August 2005...
Page 78: ...Page 78 of 906 Overview 553 3001 211 Standard 3 00 August 2005...
Page 100: ...Page 100 of 906 Acceptance tests 553 3001 211 Standard 3 00 August 2005...
Page 156: ...Page 156 of 906 Option settings 553 3001 211 Standard 3 00 August 2005...
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Page 546: ...Page 546 of 906 NT8D03 Analog Line card 553 3001 211 Standard 3 00 August 2005...
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