Ricoh A230 Service Manual page 795

NCU PARAMETERS
Address
4804AD CNG On/Off time tolerance, and number of cycles required for detection (a
setting of 4 cycles means that ON-OFF-ON or OFF-ON-OFF must be
detected twice).
Bits 7, 6, 5, 4 - number of cycles required for cadence detection
Bits 3 and 2 - OFF time tolerance (±)
Bit
Bits 1 and 0 – ON time tolerance (±)
Bit
4804AE Not used
4804AF Acceptable AI short protocol tone
(800Hz) detection frequency upper
limit (high byte)
4804B0 Acceptable AI short protocol tone
(800Hz) detection frequency upper
limit (low byte)
4804B1 Acceptable AI short protocol tone
(800Hz) detection frequency lower
limit (high byte)
Acceptable AI short protocol tone
4804B2
(800Hz) detection frequency lower
limit (low byte)
4804B3 Detection time for 800 Hz AI short
protocol tone
4804B4 PSTN: Tx level from the modem
4804B5 PSTN: 1100 Hz tone transmission
level
4804B6 PSTN: 2100 Hz tone transmission
level
4804BA ISDN: Tx level from the modem
4804BB ISDN: 1100 Hz tone transmission
level
4804BC ISDN: 2100 Hz tone transmission
level
A230/A231/A232
Function
3 2 OFF time tolerance
0 0 75%
0 1 50%
1 0 25%
1 1 12.5%
1 0 ON time tolerance
0 0 75%
0 1 50%
1 0 25%
1 1 12.5%
Unit
Hz (BCD)
Hz(BCD)
20 ms
- dBm
- N - 0.5N
4804B4
See Note 7.
- N - 0.5N
4804B4
See Note 7.
- dBm
- N - 0.5N
4804BA
- N - 0.5N
4804BA
4-70
Remarks
Do not change the
settings.
If both addresses
contain FF(F), tone
detection is disabled.
If both addresses
contain FF(F), tone
detection is disabled.
If both addresses
contain FF(F), tone
detection is disabled.
If both addresses
contain FF(F), tone
detection is disabled.
Factory setting: 360 ms
Function 06-2
(parameter 01).
(dB)
4804B5
(dB)
4804B6
The setting must be
between -12dBm and -
15dBm.
(dB)
4804BB
(dB)
4804BC
SM