NEC Electra Elite IPK Programing Manual page 462

Elite IPK
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1. Line keys 1~4 identify the following methods of loop supervision:
1 = Second Dial Tone
2 = Immediate Start
3 = Delay Dial
4 = Wink Start
2. This Memory Block affects T1 channels assigned as Tie lines.
3. When a second dial tone is selected, the distant system provides the dial tone.
4. When Immediate, Delay, or Wink is selected, the local system provides the dial tone.
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Programming Manual
Notes
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