AT commands 57

Serial Interface Control Lines commands summary

Command

Description

Value

 

 

 

 

\Qn

serial interface

0

none

 

flow control

1

bidirectional XON/XOFF

 

 

 

 

2

not supported

 

 

3

bidirectional RTS/CTS

 

 

 

(default)

 

 

4

not supported

 

 

 

 

&Cn

DCD operation

0

always on

 

 

1

tracks connection (default)

 

 

2

always on, except temporarily

 

 

 

after disconnect

 

 

 

 

&Dn

DTR operation

0

ignored (default)

 

 

1

enter command state

 

 

2

hang-up and disable auto

 

 

 

while DTR is down

 

 

3

hang-up and reset port

 

 

 

 

&Rn

CTS operation

0

CTS follows RTS

 

 

1

CTS is always on when on-line

 

 

 

(default)

 

 

 

 

&Sn

DSR operation

0

DSR is always on (default)

 

 

 

 

Flow Control

The Flow Control Command

\Qvalue

sets the method of ßow control on the interface between the

CTA 500dm and the attached computer. The following table shows the allowable values.

Value

Use

 

 

0

disable flow control

 

 

1

enable bidirectional XON/XOFF software flow control

 

 

2

not supported

 

 

3

enable bidirectional RTS/CTS hardware flow control (default)

 

 

P0873832 Issue 05

CTA 500dm On Line Guide

Page 57
Image 57
Nortel Networks CTA 500dm manual Serial Interface Control Lines commands summary, Flow Control

CTA 500dm specifications

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