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SERVICE TABLES AND PROCEDURES
NCU PARAMETERS
Address
PABX ringback tone detection time
807F22
PABX ringback tone off detection
807F23
time
PABX detection time for silent
807F24
period after ringback tone
detected (LOW)
PABX detection time for silent
807F25
period after ringback tone
detected (HIGH)
PABX busy tone frequency range
807F26
(high byte)
PABX busy tone frequency range
807F27
(low byte)
807F28
Not used
807F29
807F2A
Busy tone ON time: range 1
807F2B
Busy tone OFF time: range 1
807F2C
Busy tone ON time: range 2
807F2D
Busy tone OFF time: range 2
Busy tone ON time: range 3
807F2E
807F2F
Busy tone OFF time: range 3
Busy tone ON time: range 4
807F30
807F31
Busy tone OFF time: range 4
Busy tone continuous tone
807F32
detection time
Busy tone signal state time tolerance for all ranges, 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).
Tolerance (±)
Bit
1
807F33
0
0
1
1
Bits 7, 6, 5, 4 - number of cycles required for cadence detection
International dial tone frequency
807F34
range (high byte)
International dial tone frequency
807F35
range (low byte)
807F36
Not used
807F37
Function
0
0
75%
1
50%
0
25%
1
12.5%
4-42
Unit
20 ms
Detection is disabled if this
contains FF.
20 ms
20 ms
20 ms
Hz (BCD)
If this is FF, detection is
disabled. See Note 2.
See Note 2.
Do not change the factory
settings.
20 ms
Bits 2 and 3 must always
be kept at 0.
Hz (BCD)
See Note 2.
Do not change the factory
settings
July 30th, 1996
Remarks
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