Page 590 of 906 NT8D14 Universal Trunk card553-3001-211 Standard 3.00 August 2005Figure 127Two-way, loop DR, TIE trunk call states – outgoing call to far-end PBXSystem (near) endFar end PBXHigh-resistanceloopGround on tip,battery on ringGround on tip,battery on ringBattery on tip,ground on ringBattery-groundor loop pulseor DTMFNear endoriginatesIdleNear endhangs up(Note)Near enddisconnectsfirstNear enddisconnectsfirstNear enddisconnectsFar enddisconnectsFar enddisconnectsfirstFar endanswers(no ans sup)Far endanswers(ans sup)553-AAA1141Low-resistanceloopNote: Where no far-end answer supervision is provided, party at near end hangsup after recognizing far-end call termination.
