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WSW13 (Modem setting)
Selector
No.
1, 2
Cable equalizer
3, 4
Reception level
5–8
Modem attenuator
The modem should be adjusted according to the user's line conditions.
Selectors 1 and 2: Cable equalizer
These selectors are used to improve the pass-band characteristics of analogue
signals on a line. (Attenuation in the high-band frequency is greater than in the low-
band frequency.)
Set these selectors according to the distance from the telephone switchboard to
the machine.
Selectors 3 and 4: Reception level
These selectors set the optimum receive signal level.
Selectors 5 through 8: Modem attenuator
These selectors are used to adjust the transmitting level attenuation of the modem
when the reception level at the remote station is improper due to line loss. This
function applies for G3 protocol signals.
Setting two or more selectors to "1" produces addition of attenuation assigned to
each selector. If selector 8 on WSW23 is set to "0", this setting is so limited that 10
dB (1 dB in France) or higher setting only is effective. Note that in Japan and
China, 9 dB or higher and 2 dB or higher settings only are effective, respectively,
regardless of whether selector 8 on WSW23 is set to "0".
SM
Function
No.
No.
No.5
No.6
No.7
No.8
5-55
MAINTENANCE MODE
Setting and Specifications
1.
2.
0
0:
0 km
0
1:
1.8 km
1
0:
3.6 km
1
1:
5.6 km
3.
4.
0
0:
–43 dBm
0
1:
–47 dBm
1
0:
–49 dBm
1
1:
–54 dBm
0:
0 dB 1:
8 dB
0:
0 dB 1:
4 dB
0:
0 dB 1:
2 dB
0:
0 dB 1:
1 dB
G157
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