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EC2400-33

VEN-TEL, INC.

EC2400-33

Card Type

Modem (synchronous/asynchronous)

Chipset

Unidentified

Maximum Data Rate

2400bps

Data Bus

Serial

Data Modulation

Bell 103A/212A

ITU-T V.22, V.22bis

Error Correction/Compression

MNP5, X.PC

CONNECTIONS

Function

Label

Function

Label

Line out

CN1

RS-232/422

CN4

Line in

CN2

Power switch

SW1

DC power

CN3

Front panel switch

SW4

Note: When pressed once, the front panel switch is a hook control. When pressed twice, the modem auto-dials the stored number.

USER CONFIGURABLE SETTINGS

Setting

Label

Position

í DTR normal

SW2/1

Off

DTR forced high

SW2/1

On

í Modem displays verbose result codes

SW2/2

Off

Modem displays numeric result codes

SW2/2

On

í Result codes enabled

SW2/3

On

Result codes disabled

SW2/3

Off

í Command echo enabled

SW2/4

Off

Command echo disabled

SW2/4

On

í Auto-answer enabled

SW2/5

Off

Auto-answer disabled

SW2/5

On

í CD normal (terminal dialer disabled)

SW2/6

Off

CD forced high (terminal dialer disabled)

SW2/6

On

í CTS, DSR, and CD low when idle, high when connected (terminal dialer enabled)

SW2/6

Off

CTS, DSR, and CD normal (terminal dialer enabled)

SW2/6

On

USER CONFIGURABLE SETTINGS (CON’T)

Setting

Label

Position

í Speaker enabled

SW2/7

On

Speaker disabled

SW2/7

Off

í Command sets enabled

SW2/8

On

Command sets disabled

SW2/8

Off

í Switch configuration used

SW2/9

Off

NVRAM configuration used

SW2/9

On

í AT command set enabled

SW2/10

Off

Ven-Tel command set enabled

SW2/10

On

í Factory configured - do not alter

SW3/1

Unidentified

í Factory configured - do not alter

SW3/2

Unidentified

í Factory configured - do not alter

SW3/3

Unidentified

í Factory configured - do not alter

SW3/4

Unidentified

í Factory configured - do not alter

SW3/5

Unidentified

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

HS

Green

On

Modem is operating at 2400bps

HS

Red

On

Modem is operating at 1200bps

HS

N/A

Off

Modem is operating at 300bps

AA

Red

On

Auto-answer enabled

AA

Red

Off

Auto-answer disabled

AA

Red

Blinking

Phone is ringing

CD

Red

On

Carrier signal detected

CD

Red

Off

Carrier signal not detected

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/EC

Green

On

Modem is connected in error-correcting mode

MR/EC

Red

On

Power is on

MR/EC

Red

Blinking

Modem is in test mode

MR/EC

Red

Off

Power is off

SUPPORTED STANDARD COMMANDS

Basic AT Commands

+++, ‘comma’, A/

A, B, E, F, H, I, M, P, Q, R, T, V, X, Y, Z

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

Extended AT Commands

\C, \G, \J, \O, \Q, \T, \V, \X, \Y, \Z

%A, %C

S-Registers

S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S16, S18, S21, S22, S23, S25, S26, S27

Note: See MHI documentation for complete information.

Proprietary AT Command Set

BIT-MAPPED REGISTER S13

Format:

AT [cmds] S13=n [cmds]

Default:

Unidentified

Range:

0 - 255

Description:

Controls extended result codes and data format.

Note:

This register is only used when in switch configuration mode.

Bit

Value

Function

0

N/A

Not used.

1

0

1

Extended result codes disabled.

Extended result codes enabled.

2

0

1

Parity disabled.

Parity enabled.

3

0

1

Odd parity enabled.

Even parity enabled.

4

0

1

Data word is 7 bits.

Data word is 8 bits.

5

N/A

Not used.

6

N/A

Not used.

7

0

1

SPACE parity enabled.

MARK parity enabled.

BIT-MAPPED REGISTER S14

Format:

AT [cmds] S14=n [cmds]

Default:

Unidentified

Range:

0-255

Unit:

Bit-mapped

Description:

Controls auto-answer, echo, result codes and display, dial mode, and answer/originate mode.

Bit

Value

Function

0

0

Auto-answer disabled at power-up (switch configuration only).

Auto-answer enabled at power-up (switch configuration only).

1

0

1

Command echo disabled.

Command echo enabled.

2

0

1

Result codes enabled.

Result codes disabled.

3

0

1

Display result codes in numeric format.

Display result codes in verbose format.

4

0

1

Command sets enabled.

Command sets disabled.

5

0

1

Tone dial enabled.

Pulse dial enabled.

6

0

1

Speaker disabled (switch configuration only).

Speaker enabled until carrier detected (switch configuration only).

   

Config. Mode

Function

7

0

1

0

1

NVRAM

NVRAM

Switch

Switch

Answer mode enabled.

Originate mode enabled.

Speaker not always enabled.

Speaker always enabled.

BIT-MAPPED REGISTER S15

Format:

AT [cmds] S15=n [cmds]

Default:

Unidentified

Range:

0 - 255

Description:

Controls data speed, answer/originate mode, and duplexing.

Note:

This register is only used when in switch configuration mode.

Bit

Value

Function

1, 0

00

01

10

11

Modem will operate at 2400bps.

Modem will operate at 300bps.

Modem will operate at 110bps.

Modem will operate at 1200bps.

2

0

1

Modem is in answer mode.

Modem is in originate mode.

3

0

1

Modem uses half-duplex.

Modem uses full-duplex.

5, 4

00

01

10

11

Modem will operate at 2400bps.

Modem will operate at 300bps.

Modem will operate at 110bps.

Modem will operate at 1200bps.

COMMAND SET - VEN-TEL

Type:

Immediate

Format:

AT [cmds] %V

Description:

Enters the Ven-Tel command set mode.

CONNECT MODE

Type:

Configuration

Format:

AT [cmds] \Nn [cmds]

Description:

Controls the type of connection the modem will make.

Command

Function

\N0

Normal mode enabled.

í \N1

Direct mode enabled.

\N2

MNP reliable mode enabled.

\N3

MNP auto-reliable mode enabled.

\N4

X.PC auto-reliable mode enabled.

\N5

MNP and X.PC auto-reliable answer mode, MNP auto-reliable originate mode.

DATA SET READY (DSR) AND CLEAR TO SEND (CTS) SIGNALS

Type:

Configuration

Format:

AT [cmds] \Dn [cmds]

Description:

Controls the behaviour of the DSR and CTS signals.

Command

Function

í \D0

DSR and CTS forced high.

\D1

CTS follows CD. If &C is not set to 1 then DSR also follows CD, otherwise it follows OH.

\D2

DSR and CTS follow CD.

\D3

DSR follows answer tone, CTS forced high.

DIAL

Type:

Immediate

Format:

AT [cmds] D<#> [cmds]

Description:

Dials the telephone number indicated according to any modifiers included in the string.

Note:

Any combination of modifiers can be used to produce the desired dial functions in sequence.

Command

Function

DL

Re-dial last number.

DM

Attempt to make a MNP mode connection. Modem will fall back to normal mode.

DP

Pulse dialing enabled.

DR

Answer mode enabled; originate mode disabled following handshake initiation.

DS

Dial stored telephone number.

DT

Tone dialing enabled.

DV

Attempt to make a peer-to-peer mode X.PC connection. Modem will fall back to normal mode.

DW

Dialing resumed following dial tone detection.

DX

Attempt to make a network mode X.PC connection. Modem will fall back to normal mode.

D,

Dialing paused for amount of time specified in S8 register.

D!

Flash function initiated. Modem commanded to go off-hook for specified time before returning on-hook.

D@

Wait for Quiet Answer function enabled. Modem waits until a "quiet answer," a ring-back signal followed by silence up to the time specified in S7, is received prior to executing the rest of the dial string.

DISPLAY CONFIGURATION

Type:

Immediate

Format:

AT [cmds] \S [cmds]

Description:

Displays the settings of selected commands.

DISPLAY S-REGISTERS

Type:

Immediate

Format:

AT [cmds] %R [cmds]

Description:

Displays the settings of all S-registers.

ON-LINE

Type:

Immediate

Format:

AT [cmds] On

Description:

Instructs the modem to return to on-line state.

Command

Function

O0

Return to on-line state.

O1

Return to on-line state and end remote digital loopback test in progress.

O2

Return to on-line state and initiate remote digital loopback test.

X.PC CHARACTER DELAY

Type:

Register

Format:

AT [cmds] S50=n [cmds]

Default:

Unidentified

Range:

10 - 255

Unit:

1 mS

Description:

Sets the maximum delay time between the modem receiving a character from the DTE and the modem transmitting an X.PC block.

X.PC DISCONNECT

Type:

Immediate

Format:

AT [cmds] %H [cmds]

Description:

Disconnects from the X.PC network connection while maintaining the physical connection.

MISCELLANEOUS TECHNICAL NOTE

Bits of bit-mapped registers that are not used may be either 0 or 1.

Proprietary Ven-Tel Command Set

CLEAR STORED NUMBERS

Type:

Immediate

Format:

C

Description:

Clears all stored numbers.

COMMAND SET - AT

Type:

Configuration

Format:

Q

Description:

Returns to the AT command set.

DIAL

Type:

Immediate

Format:

K

Description:

The user will be prompted for a number to dial. The following modifiers may be used.

Command

Function

M

Attempt to make a MNP mode connection. Modem will fall back to normal mode.

V

Attempt to make a peer-to-peer mode X.PC connection. Modem will fall back to normal mode.

X

Attempt to make a network mode X.PC connection. Modem will fall back to normal mode.

&

Dialing resumed following dial tone detection.

,

Dialing paused for 2 seconds.

!

Flash function initiated. Modem commanded to go off-hook for specified time before returning on-hook.

%

Dialing paused for 5 seconds.

DIAL STORED NUMBER

Type:

Immediate

Format:

n

Default:

N/A

Range:

1 - 9

Unit:

N/A

Description:

Dials stored number n.

DISPLAY STORED NUMBERS

Type:

Immediate

Format:

D

Description:

Displays all stored numbers.

HELP

Type:

Immediate

Format:

H

Description:

Displays a list of all commands.

LOGOFF STRING

Type:

Configuration

Format:

L

Description:

Sets a string that the modem will disconnect upon receiving. Control characters may be entered by preceding the letter with a caret.

REDIAL

Type:

Immediate

Format:

R

Description:

Redials the last number dialed.

REDIAL REPEATEDLY

Type:

Immediate

Format:

F

Description:

Redials the last number dialed up to ten times with an increasingly long pause between attempts.

SET OPTIONS

Type:

Configuration

Format:

O

Description:

Displays a menu of options that may be set.

STORE NUMBER IN NVRAM

Type:

Configuration

Format:

Sn

[prompt]: <#>RaLb

Description:

The user will be prompted to enter the number to store. At the end of this number, the user may enter the R and L options. The modem will redial this number a times, and if this connection still can not be made, it will proceed to the number stored in memory location b.

MISCELLANEOUS TECHNICAL NOTE

AT commands may still be entered in this mode.