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November 29, 1999
NCU PARAMETERS
4-73
Service
Tables
4. Italy and Belgium only
RAM address 48095E: the lower four bits have the following meaning.
Bit 2 1: International dial tone cadence detection enabled (Belgium)
Bit 1 Not used
Bit 0 1: PSTN dial tone cadence detection enabled (Italy)
If bit 0 or bit 2 is set to 1, the functions of the following RAM addresses change.
480908 (if bit 0 = 1) or 480938 (if bit 2 = 1): tolerance for on or off state
duration (%), and number of cycles required for detection, coded as in address
480933.
48090B (if bit 0 = 1) or 48093B (if bit 2 = 1): on time, hex code (unit = 20 ms)
48090C (if bit 0 = 1) or 48093C (if bit 2 = 1): off time, hex code (unit = 20 ms)
5. Pulse dial parameters (addresses 48094A to 48094F) are the values for 10
pps. If 20 pps is used, the machine automatically compensates.
6. The first ring may remain undetected until 1 to 2.5 wavelengths after the time
specified by this parameter.
7. The calculated level must be between 0 and 10.
The attenuation levels calculated from RAM data are:
High frequency tone: - 0.5 x N
480952
/
480954
-3.5 dBm (PSTN)
- 0.5 x N
480955
dBm (ISDN)
Low frequency tone: - 0.5 x (N
480952
/
480954
+ N
480953
) –3.5 dBm (PSTN)
- 0.5 x (N
480955
+ N
480953
) dBm (ISDN)
Note: N
480952
, for example, means the value stored in address 480952(H)
8. 48094A: Europe - Between Ds opening and Di opening
48094D: Europe - Between Ds closing and Di closing
9. The actual inter-digit pause (pulse dial mode) is the sum of the periods
specified by the RAM addresses 48094A, 48094D, and 48094E.
4 8 0 9 4 A
4 8 0 9 4 D
4 8 0 9 4 E
4 8 0 9 4 A
Inter digit pause
b r e a k
H306M500.WMF