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CM-28

XIRCOM, INC.

CM-28

Card Type

Modem (asynchronous)

Chip Set

Unidentified

Maximum Data Rate

28.8Kbps

Maximum Fax Rate

14.4Kbps

Data Bus

PCMCIA Type II

Fax Class

Class I & II

Data Modulation Protocol

AT&T V.32terbo

Bell 212A

ITU-T V.22, V.22bis, V.23, V.32, V.32bis, V.34

Fax Modulation Protocol

ITU-T V.17, V.21CH2, V.27ter, V.29

Error Correction/Compression

MNP5, V.42bis

V1914

Proprietary AT Command Set

ACCEPT RELIABLE MODE

Type:

Immediate

Format:

AT [cmds] \U [cmds]

Description:

Accept remotes request for reliable link

AUTO-FALLBACK/FALL-FORWARD

Type:

Configuration

Format:

AT [cmds] %Gn [cmds]

Description:

Selects auto-fallback/fall-forward

Command

Function

í %G0

Auto-fallback/fall-forward disabled

%G1

Auto-fallback/fall-forward enabled

AUTO-RELIABLE FALLBACK CHARACTER

Type:

Configuration

Format:

AT [cmds] %An [cmds]

Default:

13

Range:

0-127

Unit:

ASCII

Description:

Sets the character used as the auto-reliable fallback character; %A0 will disable this function.

AUTO-RELIABLE TIME BUFFER CONFIGURATION

Type:

Configuration

Format:

AT [cmds] \Cn [cmds]

Description:

Controls the handling of incoming data during auto-reliable time period

Command

Function

í \C0

Data is discarded

\C1

Data is buffered

\C2

Data is discarded; modem returns to normal mode on receiving auto-reliable fallback character.

AUTO-RETRAIN

Type:

Configuration

Format:

AT [cmds] %En [cmds]

Description:

Selects auto-retrain mode

Command

Function

%E0

Auto-retrain disabled

í %E1

Auto-retrain enabled

BONG TONES

Type:

Configuration

Format:

AT [cmds] S121=n [cmds]

Description:

Select the type of credit card bong the modem will recognize

Command

Function

S121=0

AT&T enabled

S121=1

MCI enabled

BREAK SEND

Type:

Configuration

Format:

AT [cmds] \Bn [cmds]

Default:

3

Range:

1-9

Unit:

.1 second

Description:

Sends break to modem

BREAK TYPE

Type:

Configuration

Format:

AT [cmds] \Kn [cmds]

Description:

Configures action of break signal

Command

Break from DTE

Modem receives \B

Break received from remote modem

\K0

Online command mode enabled, send no break to remote modem

Break sent to remote modem and buffered cleared

Buffers cleared, break sent to DTE

\K1

Break sent to remote modem and buffered cleared

Break sent to remote modem and buffered cleared

Buffers cleared, break sent to DTE

\K2

Online command mode enabled, send no break to remote modem

Send break to remote modem immediately

Break sent immediately to DTE

\K3

Send break to remote modem immediately

Send break to remote modem immediately

Break sent immediately to DTE

\K4

Online command mode enabled, send no break to remote modem

Send break with transmitted data

Break sent with received data to the DTE

í \K5

Send break with transmitted data

Send break with transmitted data

Break sent with received data to the DTE

CALLING TONE

Type:

Configuration

Format:

AT [cmds] -Cn [cmds]

Description:

Controls whether the DTE will allow the modem to send a 1300Hz calling tone when originating.

Command

Function

í -C0

Disable calling tone

-C1

Enable calling tone

COMPRESSION

Type:

Configuration

Format:

AT [cmds] %Cn [cmds]

Description:

Selects data compression

Command

Function

%C0

Data compression disabled

í %C1

Data compression enabled

CONNECT MODE

Type:

Configuration

Format:

AT [cmds] \Nn [cmds]

Description:

Controls the type of connection the modem will operate in

Command

Function

\N0

Normal mode

\N2

Auto-reliable MNP mode

í \N3

Auto-reliable V.42 mode

\N4

Reliable V.42 mode

COUNTRY CODES

Type:

Register

Format:

AT [cmds] S133=n [cmds]

Description:

Selects the country code needed

Command

Function

í S133=0

United states

S133=1

United Kingdom

S133=2

Germany

S133=3

France

S133=4

Belgium

S133=5

Netherlands

S133=6

Italy

S133=7

Spain

S133=8

Austria

S133=9

Switzerland

S133=10

Portugal

S133=11

Sweden

S133=12

Norway

S133=13

Denmark

S133=14

Finland

COUNTRY CODES (CONTINUED)

Type:

Register

Format:

AT [cmds] S133n [cmds]

Description:

Selects the country code needed

S133=15

Cyprus

S133=16

Czechoslovakia

S133=17

Greece

S133=18

Hungry

S133=19

Poland

S133=20

Russia

S133=21

Turkey

S133=22

Luxembourg

S133=23

Iceland

S133=25

Egypt

S133=26

India

S133=27

Kenya

S133=28

South Africa

S133=29

Morocco

S133=48

Abu Dhabi

S133=49

Australia

S133=50

Bangladesh

S133=51

China

S133=52

Hong Kong

S133=53

Indonesia

S133=54

Japan

S133=55

Korea

S133=56

Malaysia

S133=57

New Zealand

S133=58

Philippines

S133=59

Singapore

S133=96

Argentina

S133=97

Bolivia

S133=98

Brazil

S133=99

Chile

S133=100

Colombia

S133=101

Costa Rica

S133=102

Guatemala

S133=103

Mexico

S133=104

Nicaragua

S133=105

Paraguay

S133=106

Peru

S133=107

Uruguay

S133=108

Venezuela

S133=128

Kuwait

S133=129

Oman

S133=130

Saudi Arabia

DIAL

Type:

Immediate

Format:

AT [cmds] D<#> [cmds]

Description:

Dials telephone number according to any modifiers included in the string

Command

Function

DP

Pulse dialing enabled

DR

Dial in answer mode

DS=n

Number in memory location n dialed

D,(comma)

Dialing paused for amount of time specified in S8 register

DT

Tone dialing enabled

DW

Dialing resumed following dial tone detection

D!

Flash function initiated; modem commanded to go on-hook for specified time

D@

Modem waits for a ring-back signal followed by silence up to the time specified in S7 prior to executing the rest of the dial string

D; (semi-colon)

Modem returned to command mode after dialing

D""

(double quotes)

Alphanumeric dialing switch; when a command like this is entered: ATDT1888"KICKME1", the modem changes the alpha characters into numbers; except for Q and Z.

D$

Waits for a bong tone up to the time specified in S7 prior to executing the rest of the dial string.

DTE SPEED

Type:

Register

Format:

AT [cmds] S122=n [cmds]

Description:

Selects the DTE speed that will be shown with CONNECT message

Note: The modem doesnt use DTE speed, however some applications need this to attach to the CONNECT message.

Command

Function

S122=0

CONNECT

S122=1

CONNECT 1200

S122=2

CONNECT 2400

S122=3

CONNECT 4800

S122=4

CONNECT 7200

S122=5

CONNECT 9600

S122=6

CONNECT 12000

S122=7

CONNECT 14400

S122=8

CONNECT 16800

S122=9

CONNECT 19200

S122=10

CONNECT 21600

S122=11

CONNECT 24000

S122=12

CONNECT 26400

S122=13

CONNECT 28800

S122=14

CONNECT 38400

S122=15

CONNECT 57600

S122=16

CONNECT 115200

S122=17

CONNECT 230400

EXTENDED RESULT CODES

Type:

Configuration

Format:

AT [cmds] \Vn [cmds]

Description:

Selects extended result codes

Command

Function

í \V0

Extended result codes disabled

\V1

Extended result codes enabled

FLOW CONTROL

Type:

Configuration

Format:

AT [cmds] \Gn [cmds]

Description:

Selects modem port flow control

Command

Function

í \G0

Flow control disabled

\G1

Flow control enabled

FLOW CONTROL TYPE

Type:

Configuration

Format:

AT [cmds] \Qn [cmds]

Description:

Sets type of flow control used by modem

Command

Function

\Q0

Flow control disabled

\Q1

XON/XOFF flow control enabled

\Q2

Unidirectional CTS/RTS flow control enabled

í \Q3

Bidirectional CTS/RTS flow control enabled

INACTIVITY TIMER

Type:

Configuration

Format:

AT [cmds] \Tn [cmds]

Default:

0

Range:

0-90

Unit:

1 minute

Description:

Sets the length of time that the modem does not receive information before it disconnects.

INITIATE RELIABLE MODE

Type:

Immediate

Format:

AT [cmds] \O [cmds]

Description:

Initiates reliable link from normal or direct mode

INTERNATIONAL SETTINGS

Type:

Configuration

Format:

AT [cmds] %TEn [cmds]

Description:

Enables the use of S133 for countries that require special modem settings

Command

Function

í %TE=0

Disable S133

%TE=1

Enabled S133

HELP SCREENS

Type:

Immediate

Format:

AT$

Description:

Shows command help screens for all commands beginning with the given prefix, or no prefix if none is given.

HELP SCREEN - BORDERS

Type:

Configuration

Format:

AT [cmds] S120=n [cmds]

Description:

Places a border around the help screen text

Command

Function

S120=0

Enabled; uses IBM graphics characters.

í S120=1

Disabled; no borders.

MAXIMUM BLOCK SIZE FOR TRANSMISSION

Type:

Configuration

Format:

AT [cmds] \An [cmds]

Description:

Sets the maximum transmittable block size

Command

Function

\A0

MNP block size is 64 characters

\A1

MNP block size is 128 characters

\A2

MNP block size is 192 characters

í \A3

MNP block size is 256 characters

PROTOCOL/SPEED

Type:

Configuration

Format:

AT [cmds] S43=n [cmds]

Description:

Sets the current DCE speed

Command

Function

S43=5

Set to 1200bps

S43=6

Set to 2400bps

S43=7

Set to 4800bps

S43=8

Set to 7200bps

S43=9

Set to 9600bps

S43=10

Set to 12Kbps

S43=11

Set to 14.4Kbps

S43=12

Set to 19.2Kbps

S43=15

Set to 28.8Kbps

S43=26

Set to 16.8Kbps

S43=29

Set to 24Kbps

S43=33

Set to 21.6Kbps

S43=34

Set to 26.4Kbps

REDIAL

Type:

Immediate

Format:

AT [cmds] DL

Description:

Redials the last number dialed

REPORT INFORMATION

Type:

Immediate

Format:

AT [cmds] In [cmds]

Description:

Displays modem properties

Command

Function

I0

Display product code

I1

Display ROM checksum

I2

Verify ROM checksum result

I3

Display firmware revision

I4

Display modem characteristics

I6

Reports current connections statistics

SWITCH TO NORMAL MODE

Type:

Immediate

Format:

AT [cmds] \Z [cmds]

Description:

Switches to normal mode from reliable mode

SWITCH TO RELIABLE MODE

Type:

Immediate

Format:

AT [cmds] \Y [cmds]

Description:

Switches to reliable mode from normal or direct mode

V.42 - DETECTION PHASE

Type:

Configuration

Format:

AT [cmds] -Jn [cmds]

Description:

Controls V.42 detection

Command

Function

-J0

V.42 detection disabled

í -J1

V.42 detection enabled

V.42bis - COMPRESSION CONTROL

Type:

Configuration

Format:

AT [cmds] "Hn [cmds]

Description:

Controls V.42bis data compression

Command

Function

"H0

V.42bis disabled

"H1

V.42bis when transmitting enabled

"H2

V.42bis when receiving enabled

í "H3

V.42bis when transmitting/receiving enabled

V.42bis - DICTIONARY SIZE

Type:

Configuration

Format:

AT [cmds] "Nn [cmds]

Default:

Unidentified

Range:

512-2048

Unit:

Character

Description:

Select V.42 dictionary size

V.42bis - MAXIMUM STRING LENGTH

Type:

Immediate

Format:

AT [cmds] "On [cmds]

Default:

32

Range:

6-250

Unit:

Characters

Description:

Selects string size for V.42bis compression

XON/XOFF PASS-THROUGH

Type:

Configuration

Format:

AT [cmds] \Xn [cmds]

Description:

Selects whether XON/XOFF signals are sent to remote modem

Command

Function

í \X0

XON/XOFF signals trapped by local modem

\X1

XON/XOFF passed through local modem