< WSW50 >

Selector No.

Function

 

Setting and Specifications

 

 

 

 

 

Percentage voltage for

No. 1

2

 

0

0: 50 %

1

interpreting the external

telephone as being hooked up

0

1: 80 %

2

(based on the network's

1

0: 30 %

 

 

standard voltage)

1

1: No detection

 

 

 

 

 

 

DC mask curve table to be

0: Apply the initial value specified by

3

applied when the line is

local regulations

 

connected

1: Apply table DC5 prepared specially

 

 

 

4

AC impedance to be applied

0: 600Ω termination

when the line is connected

1: ZR termination

 

 

 

 

 

 

 

No. 5

6

 

 

0

0: Standard

5

Current control to be applied

0

1: Increase start-up current for

immediately after connection of

 

termination

6

 

the line

1

0: Fine current control for

 

 

 

 

termination

 

 

1

1: Not used. (equal to “0, 0”)

 

 

 

 

 

 

No. 7

8

7

AC voltage threshold for

0

0: 19 V

0

1: 11 V

8

detection of ring

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.

App. 1-55

Confidential