Nortel Networks Circuit Card - Manual (Page 582)

Page 582 of 906 NT8D14 Universal Trunk card
553-3001-211 Standard 3.00 August 2005
Figure 121
Ground start call states – outgoing call to CO/FX/WATS
System (near) end
High-resistance loop Ground on ring
Forced
near end
disconnect
Loop pulsing
or DTMF
Forced
far end
disconnect
Near end
originates
Dial
tone
CO toll denial
Idle
Near end
disconnects
first
Near end
disconnects
first
Far end
disconnects
first
Far end
answers
(no ans sup)
and ringback
tone removed
Ringing
and
ringback
tone
Far end answers
(ans sup)
and ringback
tone removed
553-AAA1135
Low-resistance loop
Battery on ring,
tip open
Battery on ring,
ground on tip
Ground on ring,
battery on tip
CO / FX / WATS (far) end