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App. 1-55
< WSW50 >
Selector No. Function Setting and Specifications
1
2
Percentage voltage for
interpreting the external
telephone as being hooked up
(based on the network's
standard voltage)
No. 1 2
0 0: 50 %
0 1: 80 %
1 0: 30 %
1 1: No detection
3
DC mask curve table to be
applied when the line is
connected
0: Apply the initial value specified by
local regulations
1: Apply table DC5 prepared specially
4
AC impedance to be applied
when the line is connected
0: 600Ω termination
1: ZR termination
5
6
Current control to be applied
immediately after connection of
the line
No. 5 6
0 0: Standard
0 1: Increase start-up current for
termination
1 0: Fine current control for
termination
1 1: Not used. (equal to “0, 0”)
7
8
AC voltage threshold for
detection of ring
No. 7 8
0 0: 19 V
0 1: 11 V
1 0: 25 V
1 1: 31 V
Note:
WSW50 is applicable to models equipped with SDAA circuits.
- Selectors 5 and 6: Current control to be applied immediately after connection of the line
FAX models equipped with an SDAA circuit (on which an NTU chip is mounted) might not
be connected to a broad band line such as an ADSL (Asynchronous Digital Subscriber
Line) in a stable condition. If those models fail to connect to such a line, try to change the
current control to be applied immediately after connection of the line by using selectors 5
and 6.
If selectors 5 and 6 are set to “0” and “1,” respectively, the SDAA draws more current,
decreasing the period required to terminate the current control. If they are set to “1” and
“0,” the SDAA finely controls precision of the termination current against the voltage to
approach nearer to the specified DC curve that specifies the current vs. voltage
characteristics of the network termination. Selecting either control may solve an unstable
connection problem.