Ricoh A230, Service Manual, Page: 795 / 1134

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