14 June, 2002
NCU PARAMETERS
5-77
Service
Tables
5.3 NCU
PARAMETERS
The following tables give the RAM addresses and the parameter calculation units
that the machine uses for ringing signal detection and automatic dialing. The
factory settings for each country are also given. The RAM read/write (Function 06)
must change most of these, but NCU Parameter programming (Function 08) can
change some others; if Function 08 can be used, the Remarks column indicates it.
The RAM is in hex code unless (BCD) is included in the Unit column.
NOTE:
The following addresses describe settings for the standard NCU.
Change the start address 401F00H to 402000H for the settings for PSTN-2
(optional G3 unit) and 401F00H to 402100H for the settings for IP-FAX
(optional NIC unit).
Address Function
Unit
Remarks
401F00
Country code for NCU parameters
Use the Hex value to program the
country code directly into this address,
or use the decimal value to program it
using Function 08 (parameter C.C.).
Country Decimal Hex
USA
17
11
401F01
Line current detection time
20 ms
Line current is not detected
401F02
Line current wait time
if 401F01 contains FF.
401F03
Line current drop detect time
401F04
PSTN dial tone frequency upper limit
(high byte)
401F05
PSTN dial tone frequency upper limit
(low byte)
Hz
(BCD)
If both addresses contain
FF(H), tone detection is
disabled.
401F06
PSTN dial tone frequency lower limit
(high byte)
401F07
PSTN dial tone frequency lower limit
(low byte)
Hz
(BCD)
If both addresses contain
FF(H), tone detection is
disabled.
401F08
PSTN dial tone detection time
401F09
PSTN dial tone reset time (low)
401F0A
PSTN dial tone reset time (high)
401F0B
PSTN dial tone continuous tone time
401F0C PSTN dial tone permissible drop time
If 401F08 contains FF(H),
the machine pauses for the
pause time (address
401F0D / 401F0E).
401F0D PSTN wait interval (low)
401F0E
PSTN wait interval (high)
20 ms
401F0F
PSTN ring-back tone detection time
20 ms
Detection is disabled if this
contains FF(H).
401F10
PSTN ring-back tone off detection
time
20 ms
401F11
PSTN detection time for the silent
period after ring-back tone detected
(low)
20 ms