23Chapter 6

VIKING COMPONENTS 56K USB MODEM USER’S GUIDE

Basic AT Command Set (Continued)

Command

Function

&G0

Disable guard tone.

&G1

Disable guard tone.

&G2

Enable 1800 Hz tone.

&J0

Set S-Register response only for compatibility.

&J1

Set S-Register response only for compatibility.

&K0

Disable DTE/DCE flow control.

&K3

Enable RTS/CTS DTE/DCE flow control.

&K4

Enable XON/XOFF DTE/DCE flow control.

&K5

Enable transparent XON/XOFF flow control.

&K6

Enable both RTS/CTS and XON/XOFF flow control.

&L0

Select dial up line operation.

&L1

Select leased line operation.

&M0

Select direct asynchronous mode.

&M1

Select sync connect with async off-line command mode.*

&M2

Select sync connect with async off-line command mode and enable DTR of

 

directory zero.*

&M3

Select sync connect with async off-line command mode and enable DTR to

 

act as Talk/Data switch.*

&P0

Set 10 pps pulse dial with 39%/61% make/break.

&P1

Set 10 pps pulse dial with 33%/67% make/break.

&P2

Set 20 pps pulse dial with 39%/61% make/break.

&P3

Set 20 pps pulse dial with 33%/67% make/break.

&Q0

Select direct asynchronous mode.

&Q1

Select sync connect with async off-line command mode.*

&Q2

Select sync connect with async off-line command mode and enable DTR

 

dialing of directory zero.*

&Q3

Select sync connect with async off-line command mode and enable DTR to

 

act as Talk/Data switch.*

&Q4

Select Hayes AutoSync mode.

&Q5

Modem negotiates an error corrected link.

&Q6

Select asynchronous operation in normal mode.

&R0

CTS tracks RTS (async) or acts per V.25 (sync).

&R1

CTS is always active.

&S0

DSR is always active.

&S1

DSR acts per V.25.

&T0

Terminate any test in progress.

*Serial Interface operation only.

23Chapter 6

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Viking InterWorks 56K manual Basic AT Command Set Continued, Chapter