Nortel Circuit Card Installation Manual page 595

Figure 131
Two-way, loop DR, TIE trunk call states – incoming call through senderized, tandem PBX
from a CO/FX/WATS trunk
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.
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
NT8D14 Universal Trunk card
System (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
Circuit Card
Page 595 of 906
Near end
answers
(ans sup)
(Note 3)
Far end
disconnects
first
553-AAA1143
Description and Installation