Nortel Networks Video Gaming Accessories 553-3001-211 Manuale Utente

NT8D14 Universal Trunk card

Page 573 of 894

Circuit Card

Figure 120
DID trunk, loop DR call states – incoming call from CO

Far end

originates

Battery-ground

or loop pulsing

or DTMF

(Note)

Note: The near end may be configured for immediate start, delay dial, or
wink start.

Forced
far end

disconnect

Forced

near end

disconnect

Idle

Near end

disconnects

first

Near end

answers

553-AAA1137

Far end

disconnects

first

System (near) end

Low-resistance loop

High-resistance loop

CO (far) end

Ground on tip, battery on ring Battery on tip, ground on ring