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QX/4232BIS+

MICROCOM, INC.

QX/4232BIS+

Card Type

Modem (synchronous/asynchronous)

Processor

Z80

Processor Speed

10MHz

Maximum Onboard Memory

64KB DRAM

Maximum Data Rate

14.4Kbps

Data Bus

Serial

Data Modulation

Bell 103A/212A

ITU-T V.21, V.22, V.23, V.22bis, V.32, V.32bis

Error Correction/Compression

MNP5, MNP10, V.42, V.42bis

CONNECTIONS

Function

Label

Function

Label

Line out

CN1

Volume control

R1

Line in

CN2

Talk/Data switch

SW4

AC power in

CN3

Originate/Answer switch

SW5

RS232/422 port

CN4

Reset switch

SW6

USER CONFIGURABLE SETTINGS

Setting

Label

Position

Minimum receive signal level set to -43 dBm

JP4

Pins 1 & 2 closed

Minimum receive signal level set to -33 dBm

JP4

Pins 2 & 3 closed

í Factory configured - do not alter

JP8/A

Closed

í Factory configured - do not alter

JP8/B

Open

í Factory configured - do not alter

JP8/C

Open

í Factory configured - do not alter

JP9/A

Closed

í Factory configured - do not alter

JP9/B

Open

í Factory configured - do not alter

JP9/C

Open

USER CONFIGURABLE SETTINGS (CONíT)

Setting

Label

Position

Pin 1 of serial port connected to signal ground

JP10

Pins 2 & 3 closed

Pin 1 of serial port connected to chassis ground

JP10

Pins 1 & 2 closed

Pin 18 has no function

JP11/A

Open

Modem performs local analog loopback test when pin 18 goes high

JP11/A

Closed

í Factory configured - do not alter (for North America)

SW3/7

On

í Factory configured - do not alter (for North America)

SW3/8

On

Note: If pin 18 is enabled, busy out must be disabled.

LINE TYPE SELECTION

Setting

JP1/A

JP1/B

JP1/C

Leased line (0 dBm)

Open

Open

Closed

Permissive (-10 dBm)

Closed

Open

Open

Programmable (-12 dBm)

Open

Closed

Open

BUSY OUT SELECTION

Setting

JP11/B

JP11/C

Busy out enabled

Closed

Open

Busy out disabled

Open

Closed

Note: If busy out is enabled, pin 18 must be disabled.

LEASED LINE TRANSMISSION LEVEL SELECTION

Setting

SW3/1

SW3/2

SW3/3

-2 dBm

On

On

On

-4 dBm

Off

On

On

-6 dBm

On

Off

On

-8 dBm

Off

Off

On

-10 dBm

On

On

Off

-12 dBm

Off

On

Off

-14 dBm

On

Off

Off

-16 dBm

Off

Off

Off

SWITCHED LINE TRANSMISSION LEVEL SELECTION

Setting

SW3/4

SW3/5

SW3/6

-2 dBm

On

On

On

-4 dBm

Off

On

On

-6 dBm

On

Off

On

-8 dBm

Off

Off

On

-10 dBm

On

On

Off

-12 dBm

Off

On

Off

-14 dBm

On

Off

Off

-16 dBm

Off

Off

Off

CONFIGURATION MODE FUNCTION

Mode

Function

0

Normal operation of modem - sets power-up defaults for various commands

1

Sets user profile that will be loaded at power-up

2

Performs diagnostic tests

3

Modifies factory default settings loaded by &F command

4

Sets power-up defaults for V.25bis synchronous and dumb synchronous modes

Note: The QX/4232bis+ modem can be configured by switches in five modes, although command configuration is preferable when possible. Configuration modes 1, 3, and 4 can be stored in NVRAM by pressing the reset switch. Mode 0 is read on reset or power-up. Before operating, the modemís switches should be returned to mode 0 and the appropriate settings made.

CONFIGURATION MODE SELECTION

Mode

Command Set

Async/Sync

SW1/1

SW1/2

SW1/3

SW1/9

0

AT

Async

See mode 0

Off

On

On

0

V.25bis

Async

See mode 0

On

On

On

1

N/A

N/A

Off

Off

Off

On

2

N/A

Async

See mode 2

On

Off

On

2

N/A

Sync

See mode 2

On

Off

Off

3

N/A

N/A

On

Off

Off

On

4

V.25bis

Sync

See mode 4

On

On

Off

4

None

Sync

See mode 4

Off

On

Off

Configuration Mode 0 - Normal Operation

USER CONFIGURABLE SETTINGS

Setting

Label

Position

í Modem goes to command mode and disconnects on low DTR

SW1/1

On

Modem ignores DTR

SW1/1

Off

í Command echo enabled

SW1/4

On

Command echo disabled

SW1/4

Off

í Auto-answer on one ring

SW1/5

On

Auto-answer disabled

SW1/5

Off

í Command sets enabled

SW1/8

Off

Command sets disabled

SW1/8

On

í Originate/Answer button determines mode

SW1/10

On

Force answer mode

SW1/10

Off

í Error correction result codes enabled

SW2/5

Off

Extended result codes disabled

SW2/5

On

í User profile loaded on reset and power up

SW2/6

On

Factory profile loaded on reset and power up

SW2/6

Off

í Switch configuration enabled

SW2/7

Off

Switch configuration disabled

SW2/7

On

í Serial port speed locked

SW2/8

Off

Serial port speed follows connect speed

SW2/8

On

Note: SW2/8 has no function in V.25bis mode.

CD, CTS, AND DSR SIGNAL CONFIGURATION

Setting

SW1/6

SW1/7

CD, CTS, and DSR forced high

On

On

CD normal, CTS follows CD, DSR follows OH

On

Off

CD, CTS, and DSR forced high except at disconnect

Off

On

í CD normal, CTS and DSR forced high

Off

Off

FLOW CONTROL SELECTION

Setting

SW2/1

SW2/2

Flow control disabled

On

On

Bidirectional XON/XOFF flow control enabled

On

Off

í Bidirectional RTS/CTS flow control enabled

Off

On

CTS flow control by DCE enabled

Off

Off

CONNECT MODE SELECTION

Setting

SW2/3

SW2/4

Normal mode enabled

On

On

MNP reliable mode enabled

On

Off

í Auto-reliable mode enabled

Off

On

LAPM or MNP reliable mode

Off

Off

Configuration Mode 1 - User Profile

USER CONFIGURABLE SETTINGS

Setting

Label

Position

í Factory configured - do not alter

SW1/6

N/A

í Factory configured - do not alter

SW1/7

N/A

í Factory configured - do not alter

SW1/8

N/A

í Originate/Answer button determines mode

SW1/10

On

Force answer mode

SW1/10

Off

í Factory configured - do not alter

SW2/1

N/A

í Factory configured - do not alter

SW2/2

N/A

í Factory configured - do not alter

SW2/3

N/A

í Factory configured - do not alter

SW2/4

N/A

í Factory configured - do not alter

SW2/5

N/A

í Factory configured - do not alter

SW2/6

N/A

í Factory configured - do not alter

SW2/7

N/A

í Factory configured - do not alter

SW2/8

N/A

USER PROFILE SELECTION

Setting

SW1/4

SW1/5

User profile 0

On

On

User profile 1

On

Off

User profile 2

Off

On

User profile 3

Off

Off

Configuration Mode 2 - Diagnostic Testing

TOGGLE SWITCHES

Function

Label

Function

Label

Start or stop test in progress

SW1/1

Start or stop test in progress

SW4

USER CONFIGURABLE SETTINGS

Setting

Label

Position

Modem will perform local digital loopback test

SW1/4

Off

Modem will not perform local digital loopback test

SW1/4

On

Modem will perform local analog loopback test

SW1/5

Off

Modem will not perform local analog loopback test

SW1/5

On

SW1/5 performs local analog loopback with self-test

SW1/6

Off

SW1/5 performs local analog loopback test

SW1/6

On

í Factory configured - do not alter

SW1/7

N/A

í Factory configured - do not alter

SW1/8

N/A

í Factory configured - do not alter

SW1/10

N/A

í Factory configured - do not alter

SW2/1

N/A

í Factory configured - do not alter

SW2/2

N/A

í Factory configured - do not alter

SW2/3

N/A

í Factory configured - do not alter

SW2/4

N/A

í Factory configured - do not alter

SW2/5

N/A

í Factory configured - do not alter

SW2/6

N/A

í Factory configured - do not alter

SW2/7

N/A

í Factory configured - do not alter

SW2/8

N/A

Note: The modem will conduct tests in synchronous or asynchronous mode according to where SW1/9 was set the last time it was reset.

Configuration Mode 3 - Factory Default Modification

USER CONFIGURABLE SETTINGS

Setting

Label

Position

Verbose result codes enabled

SW1/6

On

Numeric result codes enabled

SW1/6

Off

Pins 18 and 21 have no function

SW1/7

On

Perform local analog loopback test when pin 18 is high, remote digital loopback test when pin 21 is high

SW1/7

Off

\K set to 0

SW1/8

Off

\K set to 5

SW1/8

On

Originate/Answer button determines mode

SW1/10

On

Force answer mode

SW1/10

Off

Inactivity timer disabled

SW2/1

On

Inactivity timer set to 15 minutes

SW2/1

Off

Modem-to-modem flow control disabled

SW2/2

On

Modem-to-modem flow control enabled

SW2/2

Off

Parity checking of flow control and escape characters disabled

SW2/3

On

Flow control and escape characters will be processed only if their parity matches serial port

SW2/3

Off

RESULT CODE CONFIGURATION

Setting

SW1/4

SW1/5

Result codes enabled

On

On

Result codes disabled

On

Off

Result codes enabled on originate only

Off

N/A

PARITY SELECTION

Setting

SW2/4

SW2/5

SW2/6

Modem will use eight data bits, no parity

On

On

On

Modem will use seven data bits, odd parity

On

On

Off

Modem will use seven data bits, even parity

On

Off

On

Modem will use seven data bits, MARK parity

On

Off

Off

Modem will use seven data bits, SPACE parity

Off

On

On

Modem will use eight data bits, odd parity

Off

On

Off

Modem will use eight data bits, even parity

Off

Off

On

Modem will use eight data bits, MARK parity

Off

Off

Off

SPEED SELECTION

Setting

SW2/7

SW2/8

Serial port speed set to 38.4Kbps; line speed set to 14.4Kbps

On

On

Serial port speed set to 19.2Kbps; line speed set to 14.4Kbps

On

Off

Serial port and line speeds set to 9600bps

Off

On

Serial port speed set to 57.6Kbps; line speed set to 14.4Kbps

Off

Off

Configuration Mode 4 - Synchronous Mode

USER CONFIGURABLE SETTINGS

Setting

Label

Position

Modem goes to command mode and disconnects on low-to-high DTR transition

SW1/1

On

Modem ignores DTR

SW1/1

Off

Originate/Answer button determines mode

SW1/10

On

Force answer mode

SW1/10

Off

Pins 18 and 21 have no function

SW2/3

On

Perform local analog loopback test when pin 18 is high, remote digital loopback test when pin 21 is high

SW2/3

Off

Auto-answer on one ring

SW2/7

Off

Auto-answer disabled

SW2/7

On

Modem will match connect speeds.

SW2/8

On

Modem will connect only at current speed.

SW2/8

Off

STORED NUMBER SELECTION

Setting

SW1/4

SW1/5

Manual dial only

On

On

Dial first stored number when Talk/Data switch is pressed

On

Off

Dial second stored number when Talk/Data switch is pressed

Off

On

Dial third stored number when Talk/Data switch is pressed

Off

Off

LINE TYPE SELECTION

Setting

SW1/6

SW1/7

SW1/8

Modem is connected to switched line

On

On

On

Modem is connected to 2-wire leased line

Off

On

On

Modem is connected to 4-wire leased line

Off

Off

On

Modem is connected to 2-wire leased line. After 6 seconds of receiving no input, the modem goes off-hook and attempts to connect.

On

Off

On

Modem is connected to 4-wire leased line. After 6 seconds of receiving no input, the modem goes off-hook and attempts to connect.

On

On

Off

CONNECT SPEED SELECTION

Setting

SW2/1

SW2/2

Modem will connect at 14.4Kbps

On

On

Modem will connect at 9600bps

On

Off

Modem will connect at 4800bps

Off

On

Modem will connect at 2400bps

Off

Off

CD, CTS, DSR, AND RTS SIGNAL CONFIGURATION

Setting

SW2/4

SW2/5

SW2/6

CD, CTS, and DSR forced high

On

On

On

CD, CTS, and DSR normal

On

On

Off

CD, CTS, and DSR forced high except at disconnect

On

Off

On

CD normal, CTS and DSR forced high

On

Off

Off

CD, CTS, and DSR normal

Off

On

On

CD normal, CTS follows RTS, DSR forced high

Off

On

Off

CD and CTS use ITU-T V.13 to simulate half-duplex modes, DSR normal

Off

Off

On

CD and CTS use ITU-T V.13 to simulate half-duplex modes, DSR forced high

Off

Off

Off

DIAGNOSTIC LED(S) (POWER-UP)

TST

OH

HS

Condition

On

Off

Off

Firmware checksum incorrect

On

Off

Red

RAM test failed

On

Off

Green

Modem failed

On

On

N/A

Modem failed

Off

Off

Off

All tests passed

DIAGNOSTIC LED(S) (NORMAL OPERATION)

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 connected at, or serial port speed is set to, 300bps

HS

Red

1 blink

Modem is connected at, or serial port speed is set to, 600bps

HS

Red

2 blinks

Modem is connected at, or serial port speed is set to, 1200bps

HS

Red

3 blinks

Modem is connected at, or serial port speed is set to, 2400bps

HS

Green

On

Modem is connected at, or serial port speed is set to, 4800bps

HS

Green

1 blink

Modem is connected at, or serial port speed is set to, 7200bps

HS

Green

2 blinks

Modem is connected at, or serial port speed is set to, 9600bps

HS

Green

3 blinks

Modem is connected at, or serial port speed is set to, 12Kbps

HS

Green

4 blinks

Modem is connected at, or serial port speed is set to, 14.4Kbps

HS

N/A

Off

Modem is connected at, or serial port speed is set to, 75bps

DTR

Unidentified

On

DTR signal is high

DTR

Unidentified

Off

DTR signal is low

TXD

Unidentified

Blinking

Modem is transmitting data

TXD

Unidentified

Off

Modem is not transmitting data

RXD

Unidentified

Blinking

Modem is receiving data

RXD

Unidentified

Off

Modem is not receiving data

SUPPORTED STANDARD COMMANDS

Basic AT Commands

+++, Ďcommaí, A/

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

&D, &F, &G, &M, &P, &T, &W, &X, &Y, &Z

Extended AT Commands

\A, \B, \C, \E, \J, \N, \Q, \T

%A, %C, %E, %F, %G

Special AT Commands

-J, *H, )M, @M, :E

S-Registers

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

Note: See MHI documentation for complete information.

Proprietary AT Command Set

COMMAND SET - V.25bis

Type:

Immediate

Format:

[cmds] \M

Description:

Enables the V.25bis command set.

DISPLAY SWITCH SETTINGS

Type:

Immediate

Format:

AT [cmds] %Sn [cmds]

Description:

Displays the modemís switch settings.

Command

Function

%S0

Display settings of SW1/1-SW1/10.

%S1

Display settings of SW2/1-SW2/8.

%S2

Display settings of SW3/1-SW3/8.

LEASED LINE CALL RESTORAL

Type:

Configuration

Format:

AT [cmds] )Pn [cmds]

Description:

Selects whether the modem will attempt to reconnect with a dial backup call to a leased line MNP reliable mode connection that has terminated abnormally. If the dial backup reconnects successfully, the call will proceed as if it had not disconnected.

Command

Function

)P0

Leased line call restoral disabled.

í )P1

Leased line call restoral enabled.

LEASED LINE COMPROMISE EQUALIZER

Type:

Configuration

Format:

AT [cmds] )En [cmds]

Description:

Selects whether the compromise equalizer will be used for leased line V.32 and V.32bis connections.

Command

Function

í )E0

Compromise equalizer disabled.

)E1

Compromise equalizer enabled.

LEASED LINE DIAL BACKUP

Type:

Configuration

Format:

AT [cmds] :Nn [cmds]

Description:

Selects whether the modem will attempt to connect to the first stored number with a switched line connection if the leased line connection fails.

Command

Function

:N0

Dial backup disabled.

í :N1

Dial backup enabled.

LEASED LINE DIAL BACKUP IN ANSWER MODE

Type:

Configuration

Format:

AT [cmds] )Cn [cmds]

Description:

Selects whether the modem is allowed to execute a dial backup if it is in answer mode.

Command

Function

)C0

Dial backup disabled in answer mode.

í )C1

Dial backup enabled in answer mode.

LEASED LINE MAXIMUM RETRAIN COUNTER

Type:

Configuration

Format:

AT [cmds] :Gn [cmds]

Description:

Sets the number of times the modem is allowed to retrain in the time specified by the :H command before it attempts a dial backup connection.

LEASED LINE MAXIMUM RETRAIN TIME

Type:

Configuration

Format:

AT [cmds] :Hn [cmds]

Default:

0

Range:

0 - 255

Unit:

1 minute

Description:

Sets the amount of time in which the modem is allowed to retrain the number of times specified by the :G command before it attempts a dial backup connection.

LEASED LINE ORIGINATE MODE TIMER

Type:

Configuration

Format:

AT [cmds] &Vn [cmds]

Default:

5

Range:

0 - 90

Unit:

1 minute

Description:

Sets the amount of time that the originating modem waits for an answer before attempting a dial backup.

LEASED LINE QUALITY

Type:

Immediate

Format:

AT [cmds] )F [cmds]

Default:

N/A

Range:

0 - 65535

Unit:

N/A

Description:

Displays the poorest quality of the phone line this connection. Higher numbers indicate a poorer connection.

LEASED LINE QUALITY CLEAR

Type:

Configuration

Format:

AT [cmds] :Y [cmds]

Description:

Clears the line quality value reported by )F so that the current line quality may be monitored.

LEASED LINE RESTORAL

Type:

Configuration

Format:

AT [cmds] )Ln [cmds]

Description:

Selects whether the modem will attempt to restore a leased line connection while connected with a dial backup connection.

Command

Function

)L0

Modem will not attempt to restore leased line connection.

í )L1

Modem will attempt to restore leased line connection.

LEASED LINE RESTORAL CARRIER TIMER

Type:

Configuration

Format:

AT [cmds] )Wn [cmds]

Default:

20

Range:

0 - 255

Unit:

1 second

Description:

Sets the amount of time that the modem waits for a carrier after attempting to restore a leased line connection. If this time expires the modem will begin a dial backup again.

LEASED LINE RESTORAL DELAY

Type:

Configuration

Format:

AT [cmds] )Xn [cmds]

Default:

60

Range:

0 - 60

Unit:

1 minute

Description:

Sets the amount of time that the modem waits after a successful dial backup to check the leased line to see if service has been re-established.

LEASED LINE RESTORAL RETRY DELAY

Type:

Configuration

Format:

AT [cmds] )Yn [cmds]

Default:

40

Range:

0 - 255

Unit:

1 second

Description:

Sets the amount of time after a failed attempt to re-connect to the leased line, and while it is performing a dial backup, that the modem watches for a carrier on the leased line. If no carrier is detected within this time the modem proceeds with the dial backup.

LEASED LINE RESTORE

Type:

Immediate

Format:

AT [cmds] )B [cmds]

Description:

Initiates a leased line restoral.

LINE TYPE

Type:

Configuration

Format:

AT [cmds] &Ln [cmds]

Description:

Selects what type of line the modem is connected to and whether it will attempt to automatically re-connect.

Command

Function

í &L0

Modem is connected to switched line.

&L1

Modem is connected to 2-wire leased line.

&L2

Modem is connected to 4-wire leased line.

&L3

Modem is connected to 2-wire leased line. After 6 seconds of receiving no input, the modem goes off-hook and attempts to connect.

&L4

Modem is connected to 4-wire leased line. After 6 seconds of receiving no input, the modem goes off-hook and attempts to connect.

OPERATING MODE

Type:

Configuration

Format:

AT [cmds] $Sn [cmds]

Description:

Selects whether the modem will operate in asynchronous or synchronous mode.

Command

Function

í $S0

Determined by SW1/9.

$S1

Force asynchronous mode.

$S2

Force synchronous mode.

Proprietary V.25bis Command Set

COMMAND SET - AT

Type:

Immediate

Format:

ATZ

Description:

Enables the AT command set.

CONNECTION SECURITY - PASSWORD SELECTION (ASYNCHRONOUS MODE)

Type:

Configuration

Format:

PSW

Description:

Changes the connection password. The user will be prompted to enter the old and new passwords. Passwords must be exactly five characters, case insensitive.

CONNECTION SECURITY - PASSWORD SELECTION (SYNCHRONOUS MODE)

Type:

Configuration

Format:

PSWxxxxx;yyyyy

Description:

Changes the connection password. The xxxxx represents old connection password, and the yyyyy is the new connection password. Passwords must be exactly five characters, case insensitive.

See MICROCOM, INC. DESKPORTE FAST for a full command summary.