NCU PARAMETERS
B465 5-40 SM
Address Function Unit Remarks
4014BD
Modem turn-on level (incoming
signal detection level)
-37-0.5N
(dBm)
4014BE
to
4014C6
Not used Do not change these settings.
4014C7 Bits 0 to 3 – Not used.
Bit 4 – V.34 protocol dump 0: Simple, 1: Detailed (default)
Bits 5 to 7 – Not used.
4014C8
to
4014D9
Not used Do not change the settings.
4014DA T.30 T1 timer 1 s See Note 7.
4014DB
to
4014DF
Not used Do not change these settings.
4014E0
bit 3
Maximum wait time for post
message
0: 12 s
1: 30 s
1: Maximum wait time for
post message
(EOP/EOM/MPS) can be
changed to 30 s.
Change this bit to “1” if
communication errors
occur frequently during
V.17 reception.
NOTES
1. If a setting is not required, store FF in the address.
2. Italy and Belgium only
RAM address 40145E: 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 are
changed.
401408 (if bit 0 = 1) or 401438 (if bit 2 = 1): tolerance for on or off state
duration (%), and number of cycles required for detection, coded as in address
401433.
40140B (if bit 0 = 1) or 40143B (if bit 2 = 1): on time, hex code (unit = 20 ms)
40140C (if bit 0 = 1) or 40143C (if bit 2 = 1): off time, hex code (unit = 20 ms)
3. Pulse dial parameters (addresses 40144A to 40144F) are the values for 10
pps. If 20 pps is used, the machine automatically compensates.
4. The first ring may not be detected until 1 to 2.5 wavelengths after the time
specified by this parameter.
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