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ULTRA SMARTMODEM 14400

HAYES MICROCOMPUTER PRODUCTS, INC.

ULTRA SMARTMODEM 14400

Modem Type

Data (synchronous/asynchronous)

Maximum Data Rate

14.4Kbps

Data Bus

External

Data Modulation Protocol

Bell 103A/212A

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

CONNECTIONS

Purpose

Location

Purpose

Location

Line in

CN1

RS-232

CN4

Line out

CN2

Power switch

SW2

DC power

CN3

   

COMMAND SETS

Mode

SW1/1

Enabled

On

Disabled

Off

LEASED LINE CARRIER TRANSMIT LEVEL ADJUSTMENT

Mode

SW1/2

Disabled

On

Enabled

Off

COMMAND MODE

Mode

SW1/3

SW1/4

AT command set

Off

Off

Asynchronous V.25 command set

Off

On

Synchronous V.25 command set w/HDLC framing

On

Off

Synchronous V.25 command set w/character framing

On

On

MI/MIC

Mode

JP1

JP2

Disabled

Pins 1 & 2 closed

Pins 1 & 2 closed

Enabled

Pins 2 & 3 closed

Pins 2 & 3 closed

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

HS

Red

On

Modem is operating at 4800bps or faster

HS

Red

Off

Modem is operating at slower than 4800bps

AA

Red

On

Auto-answer enabled

AA

Red

Off

Auto-answer disabled

AA

Red

Blinking

Line is ringing

CD

Red

On

CD signal is high

CD

Red

Off

CD signal is low

OH

Red

On

Modem is off-hook

OH

Red

Off

Modem is on-hook

RD

Red

On

Modem is receiving data

RD

Red

Off

Modem is not receiving data

SD

Red

On

Modem is transmitting data

SD

Red

Off

Modem is not transmitting data

TR

Red

On

DTR signal is high

TR

Red

Off

DTR signal is low

MR

Red

On

Power is on

MR

Red

Off

Power is off

Proprietary AT Command Set

COMMAND MODE OPTIONS

Format

AT [cmds] S94=n [cmds]

Example:

ATS94=40<CR>

Default:

0

Range:

0 - 15

Unit:

Bit-mapped

Description:

Sets various options for command set modes.

Bit

Value

Function

1, 0

00

01

10

11

Use AT command set.

Use asynchronous V.25 command set.

Use synchronous V.25 command set with HDLC framing.

Use synchronous V.25 command set with character framing.

2

0

1

Addressed calling.

Direct access calling.

3

0

1

Use ASCII character set.

Use EBCDIC character set.

RESTART REQUEST ACKNOWLEDGEMENT TIME

Type:

Register

Format:

AT [cmds] S81=n [cmds]

Example:

ATS81=15<CR>

Default:

18

Range:

0-255

Unit:

10 seconds

Description:

Sets the time the transmitting modem will wait for acknowledgement of its restart request before it initiates a recovery.

RESTART REQUEST MAXIMUM

Type:

Register

Format:

AT [cmds] S80=n [cmds]

Example:

ATS80=8<CR>

Default:

1

Range:

0-255

Unit:

N/A

Description:

Sets the number of times a restart request can be retransmitted.

V.22 PROBE REJECT TIME

Type:

Register

Format:

AT [cmds] S97=n [cmds]

Example:

ATS97=15<CR>

Default:

30

Range:

15-70

Unit:

.1 second

Description:

Sets the time for which the modem will reject the V.22/V.22bis probe signal when in V.32 mode.

V.25 OPTIONS

Format

AT [cmds] S115=n [cmds]

Example:

ATS115=40<CR>

Default:

0

Range:

0 - 3

Unit:

Bit-mapped

Description:

Sets V.25 data mode and V.25 auto-answer mode.

Bit

Value

Function

0

0

1

Answer after two rings

Answer after number of rings set in S0.

1

0

1

Select 7 data bits, even parity, and one stop bit.

Select 8 data bits, no parity, and one stop bit.

Proprietary V.25bis Command Set

RESET TO AT COMMAND SET

Type:

Immediate

Format:

RST

Example:

RST<CR>

Description:

Executes a cold reset and returns to AT command set.