2-6. NCU Parameters
No
Description
Formula
Remarks
00 Acceptable ringing signal frequency:
1,000,000/655N (Hz)
Range 1, upper limit
01 Acceptable ringing signal frequency:
1,000,000/655N (Hz)
Range 1, lower limit
02 Acceptable ringing signal frequency:
1,000,000/655N (Hz)
Range 2, upper limit
03 Acceptable ringing signal frequency:
1,000,000/655N (Hz)
Range 2, lower limit
04 Number of rings until a call is
N (rings)
detected
05 Minimum required length of the first
N x 20 (ms)
Note 2
ring
06 Minimum required length of the
N x 20 (ms)
second and subsequent rings
07 Reset time
N x 40 (ms)
08 Time between closing the Ds relay
N (ms)
Note 1
and opening the Di relay
(Europe/Asia only)
09 Pulse dial relay (PC2), break time
N (ms)
Note 1
2-67
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