Selector 3: Sending level of guard tone at phase 2 ; Selector 4: Stepping down the transmission speed at fallback each ; Selector 8: Detection of CED for stopping CNG - Page 305

 App. 

4-42 

Confidential

WSW38 

(V.34 transmission settings) 

Selector 

No. 

Function 

Setting and Specifications

1 
2 

Setting of the equalizer 

No. 1 

2 

 0 

X 

: 

Automatic 

1  0  :  Fixed to 4 points 

1  1  :  Fixed to 16 points

3 

Sending level of guard tone at 
phase 2 

0:  Normal - 7 db 

1:  Normal

4 

Stepping down the transmission 
speed at fallback each 

0:  2400 bps 

1:  4800 bps

5 
6 

Automatic control of modem's 
EQM gain for proper transmission 
speed choice 

No. 5 

6 

0  0  :  For higher transmission speed 

    than 

the 

current 

setting 

0  1  :  No change from the current 

    setting 
 

1  0  :  For lower transmission speed 

    than 

the 

current 

setting 

1  1  :  For further lower transmission 

than the setting made by 1, 0

7 

Redialing when a communications 
error occurs 

 0: 

ON 

1: 

OFF

8 

Detection of CED for stopping 
CNG 

 0: 

ON 

1: 

OFF 

NOTE: 

 WSW38 takes effect only when the V.34 mode is permitted (WSW19, selector 7) in models  

supporting V.34 mode. 

  Selectors 1 and 2:  Setting of the equalizer 

These selectors set the equalizer's training level to be applied if the machine fails to send training  
due to weak line connection.  If these selectors are set to "0, X," the modem will automatically set  
the appropriate training level. 

Selector 3:  Sending level of guard tone at phase 2 

This selector sets the sending level of guard tone for 1800 Hz to be sent at Phase 2 in the V. 34  
mode. 

Selector 4:  Stepping down the transmission speed at fallback each 

This selector determines how much the modem steps down the transmission speed at fallback  
when called by the remote station.  If this selector is set to "1," the modem may step down the  
transmission speed from 33600 bps to 28800 bps by one-time fallback. 

  Selectors 5 and 6:  Automatic control of modem's EQM gain for proper transmission speed choice 

These selectors determine how the modem controls the EQM (Eye Quality Monitor) gain for  
proper choice of the transmission speed, which applies if the modem selects higher transmission  
speed than the possible speed so that it always repeats falling back. 

Selector 8:  Detection of CED for stopping CNG 

If this selector is set to "0," the detection time of CED specified by WSW43, selectors 4 and 5 will  
apply.