AT&T 555-230-894 用户手册

Option Switch Settings

September 1995 Issue 1  

Transmit Line 
Signal Level

ZE*

-4

DOWN

UP

DOWN

UP

Compromise 
Equalizer 
(4-dB Slope)

WU*

S2B

Up

S2C

Up

Data Set Ready 
(DSR) on for Analog 
Loop Mode

YM

S3A

Up

Automatic Answer

YP*

S3B

Down

Transmitter 
Externally Timed

YD

S3C

Up

S4A**

Up

Down*

S4B**

Up

Down*

RS-CS Interval of 
50 milliseconds

(Customer 

Switch)

50

In

RS-CS Interval of 
150 milliseconds

Out

*

Factory installed

**    Down position must be selected