Page 570 of 894 NT8D14 Universal Trunk card

Figure 118

Ground start call states – outgoing call to CO/FX/WATS

 

 

 

 

System (near) end

 

 

 

High-resistance loop

Ground on ring

Low-resistance loop

 

Batteryon ring,

Idle

Forced

 

 

 

near end

 

 

 

 

 

 

 

 

disconnect

 

Far end

 

 

 

 

 

 

 

 

disconnects

 

 

 

Near end

first

 

Forced

 

originates

 

 

opentip

 

 

 

 

 

far end

 

 

 

end

 

disconnect

 

 

 

 

 

 

Loop pulsing

CO/FX/WATS(far)

 

 

 

 

Battery on ring,

ground on tip

 

Dial

or DTMF

 

 

 

tone

 

 

 

Ringing

Near end

 

and

 

ringback

disconnects

 

 

tone

first

 

 

 

 

 

 

 

CO toll denial

Far end

 

Ground on ring,

 

 

 

 

 

 

 

answers

 

Near end

 

(no ans sup)

 

Far end answers

and ringback

 

disconnects

 

batterytipon

first

(ans sup)

tone removed

 

 

and ringback

 

 

 

tone removed

 

 

 

 

 

 

 

 

 

 

553-AAA1135

553-3001-211

Standard 2.00

September 2004

 

Page 569 Page 571
Page 570
Image 570
Nortel Networks 553-3001-211 manual End, CO/FX/WATSfar Battery on ring Ground on tip
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