Nortel Networks 553-3001-211 manual NT8D14 Universal Trunk card Page 577

NT8D14 Universal Trunk card Page 577 of 894

Outgoing calls

In an outgoing call configuration, the NT8D14 Universal Trunk card is connected to an existing PBX by a tie trunk. See Figure 124 on page 578 and Figure 125 on page 579.

An outgoing call from the near-end seizes the trunk facility by placing a low-resistance loop across the tip and ring leads. Outward addressing is then applied from the System in the form of DTMF tones or dial pulses. If answer supervision is provided by the far-end, reverse battery and ground on the tip and ring leads are returned. The operation represented in Figure 126 on page 580 and Figure 127 on page 581 also applies to outgoing calls on a DID trunk.

Note: Where no far-end answer supervision is provided, the party at the near-end hangs up, after recognizing far-end call termination.

Circuit Card Description and Installation