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AX/1200

MICROCOM, INC.

AX/1200

Card Type

Modem (synchronous/asynchronous)

Chipset

Microcom, Inc.

Maximum Onboard Memory

8K battery-backup DRAM

Maximum Data Rate

1200bps

Data Bus

Serial

Data Modulation

Bell 103A/212A

ITU-T V.22

Error Correction/Compression

MNP4

CONNECTIONS

Function

Label

Function

Label

Line out

CN1

Volume

R1

Line in

CN2

Talk/data switch

SW3

DC power

CN3

Synchronous/asynchronous switch

SW4

RS-232/422

CN4

Reset switch

SW5

USER CONFIGURABLE SETTINGS

Setting

Label

Position

í Busy out disabled

JP1

Pins 3 & 4 closed

Busy out enabled

JP1

Pins 1 & 2 closed

í Receiver sensitivity set to -10 to -43 dBm

JP2

Pins 3 & 4 closed

Receiver sensitivity set to 0 to -33 dBm

JP2

Pins 1 & 2 closed

í Pin 12 of RS-232 port indicates 1200bps connection

JP3/A

Closed

Pin 12 of RS-232 port does not indicate 1200bps connection

JP3/A

Open

í Synchronous transmit clock on RS-232 pin 15 enabled

JP3/B

Closed

Synchronous transmit clock on RS-232 pin 15 disabled

JP3/B

Open

USER CONFIGURABLE SETTINGS (CON’T)

Setting

Label

Position

í Pin 15 of RS-232 port does not indicate 1200bps connection

JP3/C

Open

Pin 15 of RS-232 port indicates 1200bps connection

JP3/C

Closed

í RTS signal in on RS-232 pin 15 disabled

JP3/D

Open

RTS signal in on RS-232 pin 15 enabled

JP3/D

Closed

í Factory configured - do not alter

JP4

N/A

í DTR normal

SW1/1

On

DTR forced high

SW1/1

Off

í Microcom SX command set enabled (asynchronous mode only)

SW1/2

On

AT command set enabled (asynchronous mode only)

SW1/2

Off

í Result codes disabled (asynchronous mode only)

SW1/3

On

Result codes enabled (asynchronous mode only)

SW1/3

Off

í Command echo disabled (asynchronous mode only)

SW1/4

Off

Command echo enabled (asynchronous mode only)

SW1/4

On

í Auto-answer enabled (asynchronous mode only)

SW1/5

On

Auto-answer disabled (asynchronous mode only)

SW1/5

Off

í CD normal (asynchronous mode only)

SW1/6

On

CD forced high (asynchronous mode only)

SW1/6

Off

í Verbose result codes enabled (asynchronous mode only)

SW1/7

On

Numeric result codes enabled (asynchronous mode only)

SW1/7

Off

í Command sets disabled (asynchronous mode only)

SW1/8

On

Command sets enabled (asynchronous mode only)

SW1/8

Off

í MNP result codes disabled (asynchronous mode only)

SW2/5

On

MNP result codes enabled (asynchronous mode only)

SW2/5

Off

í Factory defaults not restored on reset (asynchronous AT command set only)

SW2/6

On

Factory defaults restored on reset (asynchronous AT command set only)

SW2/6

Off

í Switched line type (synchronous mode only)

SW2/6

On

Leased line type (synchronous mode only)

SW2/6

Off

í Configuration not set to switch settings on reset (asynchronous mode only)

SW2/7

On

Configuration set to switch settings on reset (asynchronous mode only)

SW2/7

Off

í Auto-answer disabled (synchronous mode only)

SW2/7

On

Auto-answer enabled (synchronous mode only)

SW2/7

Off

í Factory configured - do not alter

SW2/8

Off

AUTO-DIAL NUMBER (SYNCHRONOUS MODE ONLY)

Setting

SW1/4

SW1/5

SW1/6

SW1/7

First number

Off

On

On

On

Second number

On

Off

On

On

Third number

On

On

Off

On

Fourth number

On

On

On

Off

Disabled

On

On

On

On

FLOW CONTROL (ASYNCHRONOUS MODE ONLY)

Modem to DTE

Modem to Modem

SW2/1

SW2/2

Disabled

Disabled

On

On

XON/XOFF

XON/XOFF

On

Off

RTS/CTS

XON/XOFF

Off

On

Disabled

Disabled

Off

Off

CONNECT MODE (ASYNCHRONOUS MODE ONLY)

Setting

SW2/3

SW2/4

Normal mode

On

On

Direct mode

Off

Off

Reliable mode

On

Off

Auto-reliable mode

Off

On

CD, DSR, AND CTS SIGNALS (SYNCHRONOUS MODE ONLY)

CD Signal

DSR Signal

CTS Signal

SW2/4

SW2/5

Forced high

Forced high

Forced high

On

On

Normal

Follows OH

Normal

On

Off

High except at disconnect

High except at disconnect

High except at disconnect

Off

On

Normal

Forced high

Forced high

Off

Off

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

PWR

Unidentified

On

Power is on

PWR

Unidentified

Off

Power is off

TST

Unidentified

On

System error has occurred or modem is retraining

TST

Unidentified

Blinking

Serial port is waiting to be configured

TST

Unidentified

One blink

Data error has occurred

TST

Unidentified

Off

Normal operation

OH

Unidentified

On

Modem is off-hook

OH

Unidentified

Off

Modem is on-hook

HS

Red

On

Modem is operating at 1200bps

HS

Red

Off

Modem is operating at 300bps

DTR

Unidentified

On

DTR signal is high

DTR

Unidentified

Off

DTR signal is low

TX

Unidentified

Blinking

Modem is transmitting data

TX

Unidentified

Off

Modem is not transmitting data

RX

Unidentified

Blinking

Modem is receiving data

RX

Unidentified

Off

Modem is not receiving data

SUPPORTED STANDARD COMMANDS

Basic AT Commands

+++, ‘comma’, A/

A, B, E, H, I, M, O, P, Q, T, V, X, Z

&D, &F, &G, &L, &M, &P, &R, &T, &W, &Z

Extended AT Commands

\A, \B, \C, \E, \G, \J, \L, \N, \O, \Q, \T, \U, \V, \X, \Y, \Z

%A, %E

S-Registers

S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S12, S14, S16, S18, S21, S22, S23, S25, S26, S27

Note: See MHI documentation for complete information.

See MICROCOM, INC. AX/2400 for a full command summary.