Nortel Networks 553-3001-211 manual Senderized operation for did and two-way loop DR trunks

Page 582 of 894 NT8D14 Universal Trunk card

Senderized operation for DID and two-way loop DR trunks

Incoming calls

If the far-end is senderized, the near-end can operate in any mode: Immediate Start (IMM), Delay Dial (DDL) or Wink (WNK) start, as assigned at the STRI prompt in the Trunk Administration program LD 14. See Figure 128 on page 583.

Note: If a ground start trunk, the outpulse towards office occurs after ground detection. If a loop start trunk, the outpulse towards office occurs one second later.

For immediate start, following the seizure signal, the far-end starts pulsing after the standard delay (normally 65 ms, minimum).

For delay dial or wink start modes, stop/go signaling (off hook/on hook or battery/ground reversal) is returned by the System after receipt of the seizure signal. The delay dial (stop) signal begins immediately upon seizure and ends (go signal) 384 ms later. The wink start (stop) signal begins 384 ms after seizure and ends (go signal) 256 ms later. The far-end detecting the go signal starts pulsing after the standard delay (normally 55 ms, minimum). Stop/go signaling, in addition to the signaling function, serves as an integrity check to help identify a malfunctioning trunk.

If required, the near-end can be configured to provide pseudo-answer supervision at the expiration of the end-of-dial timer. End-of-dial timer settings are made at the EOD (non-DTMF) or ODT (DTMF) prompts in the Trunk Route Administration program LD 16.

The operation represented in Figure 129 on page 584 also applies to incoming calls on a DID trunk from a CO.

Outgoing calls

When DDL or WNK mode is used, outgoing calls require a stop/go signal from the far-end so that the near-end cannot outpulse until the far-end is ready to receive digits. See Figure 130 on page 586.

553-3001-211 Standard 2.00 September 2004