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SERVICE TABLES AND PROCEDURES
NCU PARAMETERS
Address
Bits 7 to 5 - Not used
Bit 4 - DTMF detection
0: Disabled
480483
1: Enabled
Bits 3 to 0 - Not used
Bits 7 to 5 - DTMF On detection time
Bit 7 Bit 6 Bit 5
Bits 4 to 2 - DTMF Off detection time
480484
Bit 4 Bit 3 Bit 2
Bits 1 and 0 - Not used.
480485
Not used
to
4804A0
Acceptable CED detection
4804A1
frequency upper limit (high byte)
Acceptable CED detection
4804A2
frequency upper limit (low byte)
Acceptable CED detection
4804A3
frequency lower limit (high byte)
Acceptable CED detection
4804A4
frequency lower limit (low byte)
CED detection time
4804A5
Acceptable CNG detection
4804A6
frequency upper limit (high byte)
Acceptable CNG detection
4804A7
frequency upper limit (low byte)
Acceptable CNG detection
4804A8
frequency lower limit (high byte)
Acceptable CNG detection
4804A9
frequency lower limit (low byte)
CNG detection time
4804AA
CNG on time
4804AB
CNG off time
4804AC
Function
Setting
0
0
0
30 ms
0
0
1
40 ms
0
1
0
80 ms
0
1
1
140 ms
Setting
0
0
0
30 ms
0
0
1
40 ms
0
1
0
80 ms
0
1
1
140 ms
Unit
BCD (Hz)
BCD (Hz)
20 ms
± 20 ms
BCD (Hz)
BCD (Hz)
20 ms
± 20 ms
20 ms
20 ms
4-62
December 21st, 1995
Remarks
Do not change the setting.
If bit 4 is set to 0, Fax On
Demand and Transfer
operation using DTMF are
disabled.
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.
Factory setting: 200 ms
If both addresses contain
FF(F), tone detection is
disabled.
If both addresses contain
FF(F), tone detection is
disabled.
Factory setting: 200 ms
Factory setting: 500 ms
Factory setting: 200 ms
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