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AT% (Percent) and AT\ (Backslash) Commands :   Motorola SM56 Software Modem User's Guide

The modem responds to the following AT% and AT\ command options.

The letters AT (or at) must precede all commands except A/ and +++. Factory-default options are underlined.

 

Command

Option

Description

%B

 

 

Maximum Modulation Rate

Sets the maximum rate that the modem uses when connecting in a data modulation mode for performing functions such as Internet access or file transfer

 

%B0

Maximum modem rate that the modem supports

 

%B1

300 bps

 

%B2

1.2 Kbps

 

%B3

2.4 Kbps

 

%B4

4.8 Kbps

 

%B6

9.6 Kbps

 

%B7

7.2 Kbps

 

%B8

12.0 Kbps

 

%B9

14.4 Kbps

 

%B11

16.8 Kbps

 

%B12

19.2 Kbps

 

%B13

21.6 Kbps

 

%B14

24.0 Kbps

 

%B15

26.4 Kbps

 

%B16

28.8 Kbps

 

%B17

31.2 Kbps

 

%B18

33.6 Kbps

 

%B19

32.0 Kbps

 

%B20

34.0 Kbps

 

%B21

36.0 Kbps

 

%B22

38.0 Kbps

 

%B23

40.0 Kbps

 

%B24

42.0 Kbps

 

%B25

44.0 Kbps

 

%B26

46.0 Kbps

 

%B27

48.0 Kbps

 

%B28

50.0 Kbps

 

%B29

52.0 Kbps

 

%B30

54.0 Kbps

 

%B31

56.0 Kbps

 

%B32

58.0 Kbps

 

%B33

60.0 Kbps

 

%B34

28000 bps

 

%B35

29333 bps

 

%B36

30666 bps

 

%B37

33333 bps

 

%B38

34666 bps

 

%B39

37333 bps

 

%B40

38666 bps

 

%B41

41333 bps

 

%B42

42666 bps

 

%B43

45333 bps

 

%B44

46666 bps

 

%B45

49333 bps

 

%B46

50666 bps

 

%B47

53333 bps

 

%B48

54666 bps

%C

 

 

Data Compression (DC) Mode

Determines whether the modem implements methods of increasing the effective data rate by reducing the number of bits used to represent data

 

%C0

Disable Compression

 

%C1

Enable Compression

%D

 

 

Disconnect Buffer Delay

Controls the delay after detection of a disconnect request before the modem disconnects from the telephone line

 

%D0

Disable Delay

 

%Dn

Delay for n Seconds (n = 1 to 255)

%L

 

Minimum Modulation Rate

Sets the minimum rate that the modem uses when connecting in a data modulation mode.

 

%L0

Minimum modem rate that the modem supports(300 bps)

 

%L1

300 bps

 

%L2

1.2 Kbps

 

%L3

2.4 Kbps

 

%L4

4.8 Kbps

 

%L7

7.2 Kbps

 

%L6

9.6 Kbps

 

%L8

12.0 Kbps

 

%L9

14.4 Kbps

 

%L11

16.8 Kbps

 

%L12

19.2 Kbps

 

%L13

21.6 Kbps

 

%L14

24.0 Kbps

 

%L15

26.4 Kbps

 

%L16

28.8 Kbps

 

%L17

31.2 Kbps

 

%L18

33.6 Kbps

 

%L19

32.0 Kbps

 

%L20

34.0 Kbps

 

%L21

36.0 Kbps

 

%L22

38.0 Kbps

 

%L23

40.0 Kbps

 

%L24

42.0 Kbps

 

%L25

44.0 Kbps

 

%L26

46.0 Kbps

 

%L27

48.0 Kbps

 

%L28

50.0 Kbps

 

%L29

52.0 Kbps

 

%L30

54.0 Kbps

 

%L31

56.0 Kbps

 

%L32

58.0 Kbps

 

%L33

60.0 Kbps

 

%L34

28000 bps

 

%L35

29333 bps

 

%L36

30666 bps

 

%L37

33333 bps

 

%L38

34666 bps

 

%L39

37333 bps

 

%L40

38666 bps

 

%L41

41333 bps

 

%L42

42666 bps

 

%L43

45333 bps

 

%L44

46666 bps

 

%L45

49333 bps

 

%L46

50666 bps

 

%L47

53333 bps

 

%L48

54666 bps

\K

 

Break Handling Method

 

\K1

Destructive Expedited

 

\K3

Non-destructive Expedited

 

\K5

Non-destructive Non-expedited

\N

 

Error-Correction (EC) Mode

 

\N0

Normal

 

\N1

Direct

 

\N4

LAP-M Only

 

\N6

Reliable

 

\N7

Auto-Reliable

\Q

 

DTE Flow Control

 

\Q0

Disable

 

\Q1

XON/XOFF (software flow control)

 

\Q3

RTS/CTS (hardware flow control)

\T

 

Disconnect on DTE Inactivity

 

\T0

Disable

 

\Tn

Disconnect after n minutes of inactivity by the computer; n = 0 to 255

\V

 

Connect Message Format

Determines which messages the modem generates at connection time

 

\V0

Display DTE Rate

 

\V1

DTE with EC /DC message

 

\V2

Display DCE Rate

 

\V3

DCE with EC/DC Message

 

\V4

DCE with Modulation & EC/DC Message

 

Table 1: AT% (Percent) and AT\ (Backslash) Commands

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