616 NT8D14 Universal Trunk cardDial pulses or DTMF tones are then presented from the CO. When thecalled party answers, the universal trunk card reverses battery and groundon the tip and ring leads to the CO. The trunk is arranged for first partyrelease. The CO releases the trunk by removing the low-resistance loop, atwhich time normal battery and ground are restored at the near-end. Thisalso applies to incoming tie trunk calls from a far-end PBX.Note: The near-end can be configured for immediate start, delay dial,or wink start.An incoming call from the CO places a low-resistance loop across the tipand ring leads. See Figure 173 "DID trunk, loop DR call states - incomingcall from CO" (page 619) and Figure 174 "DID trunk, loop DR call connectionsequence - incoming call from CO" (page 620).Dial pulses or DTMF tones are then presented from the CO. When thecalled party answers, the universal trunk card reverses battery and groundon the tip and ring leads to the CO. The trunk is arranged for first partyrelease. The CO releases the trunk by removing the low-resistance loop,at which time normal battery and ground are restored at the near-end.The operation represented in Figure 173 "DID trunk, loop DR call states -incoming call from CO" (page 619) and Figure 174 "DID trunk, loop DR callconnection sequence - incoming call from CO" (page 620) also applies toincoming TIE trunk calls from a far-end PBX.Note: The near-end can be configured for immediate start, delay dial,or wink start.An incoming call from the CO places a low-resistance loop across the tipand ring leads. See Figure 185 "DID trunk, loop DR call states - incomingcall" (page 633) and Figure 186 "DID trunk, loop DR call connectionsequence - incoming call" (page 634). Dial pulses or DTMF tones are thenpresented from the CO. When the called party answers, the universal trunkcard reverses battery and ground on the tip and ring leads to the CO. Thetrunk is arranged for first party release. The CO releases the trunk byremoving the low-resistance loop, at which time normal battery and groundare restored at the near-end. This also applies to incoming tie trunk callsfrom a far-end PBX.Nortel Communication Server 1000Circuit Card ReferenceNN43001-311 01.04 StandardRelease 5.0 23 May 2008Copyright © 2003-2008, Nortel Networks.
