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 - Not used. Keep these bit at 0.
Bits 1 and 0 - Tolerance (
±
)
Bit 1 0 ON time tolerance OFF time tolerance
0 0 150% 75%
0 1 100% 50%
1 0 50% 25%
1 1 25% 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 08 (parameter 01).
4804B5
PSTN: 1100 Hz tone transmission
level
- N
4804B4
- 0.5N
4804B5
(dB)
4804B6
PSTN: 2100 Hz tone transmission
level
- N
4804B4
- 0.5N
4804B6
(dB)
4804B7
PABX: Tx level from the modem
- dBm
4804B8
PABX: 1100 Hz tone transmission
level
- N
4804B7
- 0.5N
4804B8
(dB)
4804B9
PABX: 2100 Hz tone transmission
level
- N
4804B7
- 0.5N
4804B9
(dB)
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)
4804BD
Modem turn-on level (incoming
signal detection level)
-37-0.5N
(dBm)
N must be between 0
(00(H)) to 31 (1F(H)).
Modem turn-off level is
automatically set at -3dBm
from the turn-on level.
Ser
v
ice
T
abl
es
December 21st, 1995
SERVICE TABLES AND PROCEDURES
NCU PARAMETERS
4-63