Page 586 of 894 NT8D14 Universal Trunk card

Figure 130

Two-way, loop DR, TIE trunk call states – outgoing call through far-end PBX to CO/FX/WATS

 

System (near) end

 

Ground on tip,

Low-resistance

High-resistance

battery on ring

loop

loop

Far end

Ground on tip, battery on ring

Idle

Near end hangs up (Note 3)

Battery-ground

Near end

 

or loop pulses, disconnects

 

or DTMF

first

 

 

(Note 1)

Far end

 

 

answers

Near end

 

 

(no ans sup)

 

(Note 2)

disconnects

Near end

 

 

 

 

originates

Dial

 

Far end

 

tone

 

 

 

 

disconnects

Far end

disconnects

Gofirst

tip, ring

(Note 2) Far end

Near end

on on

Stop

answers

disconnects

(ans sup)

first

 

Battery ground

provided by far

 

 

Universal service

 

end PBX if

originating end is

senderized

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.

553-1144

553-3001-211 Standard 2.00 September 2004

Page 585 Page 587
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Image 586
Nortel Networks 553-3001-211 manual Battery on ring Loop Far end Ground on tip, battery on ring, On on
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