...because we can't all be on the bleeding edge...





T1500

TELEBIT CORPORATION

T1500

Card Type

Modem (synchronous/asynchronous)

Chipset

Unidentified

Maximum Data Rate

9600bps

Data Bus

Serial

Data Modulation

Bell 103A/212A

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

Error Correction/Compression

MNP5

CONNECTIONS

Function

Label

Function

Label

Line out

CN1

Power switch

SW1

Line in

CN2

Talk/Data switch

SW2

RS-232 port

CN3

User profile 0/1 switch

SW3

DC power in

CN4

   

MI/MIC OR A/A1 SELECTION

Setting

E6

E7

í MI/MIC mode

Pins 1 & 2 closed

Pins 1 & 2 closed

A/A1 mode

Pins 2 & 3 closed

Pins 2 & 3 closed

TRANSMISSION LEVEL SELECTION

Setting

R51

0 dBm

20K ohm

-1 dBm

22.6K ohm

-2 dBm

24.9K ohm

-3 dBm

28K ohm

-4 dBm

31.6K ohm

-5 dBm

35.7K ohm

-6 dBm

40.2K ohm

-7 dBm

44.2K ohm

-8 dBm

49.9K ohm

í -9 dBm

56.2K ohm

-10 dBm

63.4K ohm

-11 dBm

71.5K ohm

-12 dBm

78.7K ohm

-13 dBm

88.7K ohm

-14 dBm

100K ohm

-15 dBm

113K ohm

Note: Manufacturer suggests using a resistor with a 1% tolerance. For this resistor to take effect, register S102 must not be set to a programmable mode.

DIAGNOSTIC LED(S) (MODE SELECTION)

CD

MR

Condition

Off

On

Modem is indicating asynchronous extended command mode

Off

Blinking

User has selected asynchronous extended command mode

On

Off

Modem is indicating asynchronous standard command mode

Blinking

Off

User has selected asynchronous standard command mode

On

On

Modem is indicating synchronous V.32 mode

Blinking

Blinking

User has selected synchronous V.32 mode

Note: To enter mode selection, hold down SW2 while powering the modem on. Pressing SW2 briefly cycles through modes, and holding SW2 down for at least two seconds selects the current mode.

DIAGNOSTIC LED(S) (NORMAL OPERATION)

LED

Color

Status

Condition

CD

Unidentified

On

Carrier signal detected

CD

Unidentified

Off

Carrier signal not detected

OH

Unidentified

On

Modem is off-hook

OH

Unidentified

Off

Modem is on-hook

RD

Unidentified

On

Modem is receiving data

RD

Unidentified

Off

Modem is not receiving data

SD

Unidentified

On

Modem is transmitting data

SD

Unidentified

Off

Modem is not transmitting data

CTS

Unidentified

On

CTS signal is high

CTS

Unidentified

Off

CTS signal is low

DTR

Unidentified

On

DTR signal is high

DTR

Unidentified

Off

DTR signal is low

MR

Unidentified

On

Power is on

MR

Unidentified

Off

Power is off

SUPPORTED STANDARD COMMANDS (STANDARD MODE)

Basic AT Commands

+++, ‘comma’, A/

A, B, D, E, F, H, I, L, M, N, O, Q, V, W, X, Y, Z

&C, &D, &F, &G, &J, &K, &L, &M, &P, &Q, &R, &S, &T, &V, &W, &X, &Y, &Z

S-Registers

S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S18, S25, S26, S36, S37, S38

SUPPORTED STANDARD COMMANDS (ENHANCED MODE)

Basic AT Commands

+++, ‘comma’, A/

A, C, E, F, H, M, O, V, W, Y

&P, &T

S-Registers

S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S18, S25, S26, S38

Note: See MHI documentation for complete information.

Proprietary AT Command Set (Standard Mode)

ENHANCED MODE COMMAND

Type:

Special

Format:

AT ~[cmd]

Example:

AT ~I4 &X1 ~S150=2<CR>

Description:

The command immediately following the ~ character will be executed as an enhanced mode command. No other commands on the command line will be affected.

Note:

This character may be changed by register S222.

Proprietary AT Command Set (Enhanced Mode)

ANSWER/ORIGINATE MODE

Type:

Register

Format:

AT [cmds] S100=n [cmds]

Description:

Selects whether the modem answers and originates calls normally or in the reverse mode.

Command

Function

í S100=0

Modem answers calls in answer mode and originates calls in originate mode.

S100=1

Modem answers calls in originate mode and originates calls in answer mode.

ASYNC/SYNC MODE

Type:

Register

Format:

AT [cmds] S150=n [cmds]

Description:

Selects the operating mode of the modem.

Command

Function

í S150=0

Modem will operate in asynchronous mode.

S150=2

Modem will operate in synchronous mode. The RS-232 secondary transmit/receive pair may be used to connect a command terminal to enter commands and receive result codes.

S150=3

Modem will operate in asynchronous mode will in command mode, and synchronous while in connect mode.

AUTO-CONNECT

Type:

Register

Format:

AT [cmds] S101=n [cmds]

Description:

Selects whether the modem will attempt to connect automatically when no carrier is detected even when no call has been made or received.

Command

Function

í S101=0

Modem does not attempt to auto-connect.

S101=1

Modem attempts to connect in answer mode every 20 seconds.

S101=2

Modem attempts to connect in originate mode every 20 seconds.

S101=3

Modem attempts to connect in answer mode immediately after carrier is lost, then pauses 20 seconds before retrying.

S101=4

Modem attempts to connect in originate mode immediately after carrier is lost, then pauses 20 seconds before retrying.

BREAK TYPE

Type:

Register

Format:

AT [cmds] S54=n [cmds]

Description:

Configures the modem’s reaction to a break signal.

Command

Function

í S54=0

Online command mode enabled, break not sent to remote modem.

S54=3

Modem sends break in sequence when in data mode, and immediately when in command mode.

S54=4

Break signal ignored.

CD SIGNAL

Type:

Register

Format:

AT [cmds] S131=n [cmds]

Description:

Controls the behaviour of the CD signal.

Command

Function

S131=0

CD forced high.

S131=1

CD normal.

í S131=2

CD is brought high when modem is ready in command mode or is ready to accept data.

S131=3

CD is brought high when modem is ready in command mode or is ready to accept incoming data. When modem disconnects, DSR is brought low for time specified by S47.

S131=4

CD follows the inverse of CTS.

CLOCK SOURCE

Type:

Register

Format:

AT [cmds] S154=n [cmds]

Description:

Selects where the modem derives the clock used in synchronous modes.

Command

Function

í S154=0

Modem uses internal clock source.

S154=1

Modem uses external clock source.

S154=2

Modem is a slave to received clock source.

COMMAND SET

Type:

Immediate

Format:

AT [cmds] &B

Description:

Disables the AT command set.

COMMAND SET TYPE

Type:

Register

Format:

AT [cmds] S63=n [cmds]

Description:

Selects whether the AT prefix is required in command mode, and which form of the AT command set will be used.

Command

Function

S63=0

AT prefix not required and enhanced command set enabled. All characters entered in command mode will be assumed to be commands.

S63=1

AT prefix required for command mode and enhanced command set enabled.

S63=2

AT prefix required for command mode and standard command set enabled.

CONNECT MODE

Type:

Register

Format:

AT [cmds] S95=n [cmds]

Description:

Selects the type of MNP mode connection that the modem will attempt to make.

Command

Function

í S95=0

Normal mode connection only.

S95=1

MNP reliable mode connection only.

S95=2

MNP auto-reliable mode connection.

CTS SIGNAL

Type:

Register

Format:

AT [cmds] S67=n [cmds]

Description:

Controls the behaviour of the CTS signal.

Command

Function

í S67=0

CTS is forced high.

S67=1

CTS follows RTS. When RTS goes high, there is a 200 mS delay before CTS follows.

S67=2

CTS follows RTS. When RTS goes high, there is a delay specified by S26 before CTS follows.

DATA COMPRESSION

Type:

Register

Format:

AT [cmds] S96=n [cmds]

Description:

Selects whether the modem will attempt to use MNP data compression.

Command

Function

S96=0

Data compression disabled.

í S96=1

Data compression enabled.

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

DP

Pulse dialing enabled.

DR

Answer mode enabled; originate mode disabled following handshake initiation.

DNn

Dial stored telephone number n.

DT

Tone dialing enabled.

DW

Dialing resumed following dial tone detection.

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;

Modem returned to idle state after dialing. The semicolon can only be placed at the end of the dial command.

D\x\

Dials the stored telephone number with description x.

DIAL INTERRUPT

Type:

Register

Format:

AT [cmds] S64=n [cmds]

Description:

Selects whether the modem will abort a dial, answer, or connect sequence if characters are received from the DTE.

Command

Function

í S64=0

Sequence aborted.

S64=1

Sequence not aborted.

DISPLAY CONFIGURATION

Type:

Immediate

Format:

AT [cmds] &Nn [cmds]

Description:

Displays the specified configuration stored in non-volatile RAM.

Command

Function

í &N0

Display profile specified by S255.

&N1

Display profile 0.

&N2

Display profile 1.

DSR DELAY ON DISCONNECT

Type:

Register

Format:

AT [cmds] S47=n [cmds]

Default:

4

Range:

0 - 255

Unit:

50 mS

Description:

Sets the time that DSR is forced low after disconnect.

DSR SIGNAL

Type:

Register

Format:

AT [cmds] S130=n [cmds]

Description:

Controls the behaviour of the DSR signal.

Command

Function

S130=0

DSR is forced high.

S130=1

DSR is brought high when an answer tone is sent or received.

í S130=2

DSR is brought high when modem is ready in command mode or is ready to accept data.

S130=3

DSR is brought high when modem is ready in command mode or is ready to accept data. When modem disconnects, DSR is brought low for time specified by S47.

S130=4

DSR is brought high when modem goes off hook.

S130=5

DSR follows remote carrier.

S130=6

If modem is off line and DTR goes high, DSR will be brought high. If DTR is high and a connection is made, DSR will be brought high. If DTR goes low or carrier is lost, DSR will be brought low.

DTR DIALING

Type:

Register

Format:

AT [cmds] S104=n [cmds]

Description:

Selects whether the modem will auto-dial the first stored number on DTR signal changes.

Command

Function

í S104=0

DTR dialing disabled.

S104=1

Modem auto-dials stored number specified by the current configuration on low-to-high DTR change.

S104=3

Modem auto-dials stored number specified by the current configuration when SW2 is pressed.

S104=4

When DTR goes high, the modem will connect in answer mode if the value stored in register S1 is greater than that stored in S0. Otherwise, it will connect in originate mode.

DTR SIGNAL

Type:

Register

Format:

AT [cmds] S52=n [cmds]

Description:

Controls the modem’s response to the DTR signal.

Command

Function

S52=0

Modem assumes DTR is forced high.

í S52=1

Modem goes idle on low DTR.

S52=2

Modem is reset on low DTR.

S52=3

Modem enters command mode on low DTR.

S52=4

Modem disconnects, disables auto-answer, and enters command mode on low DTR.

EIGHTH BIT FILTER

Type:

Register

Format:

AT [cmds] S48=n [cmds]

Description:

Selects whether the high bit of a character is cleared before detection of XON, XOFF and escape characters.

Command

Function

í S48=0

Eighth bit is cleared.

S48=1

Eighth bit is not cleared.

ESCAPE SEQUENCE RESPONSE

Type:

Register

Format:

AT [cmds] S55=n [cmds]

Description:

Configures the modem’s reaction to an escape sequence.

Command

Function

í S55=0

Modem returns to command mode after set guard time has passed and escape characters sent to remote modem.

S55=1

Buffers are cleared and escape characters sent to remote modem.

S55=2

Escape characters sent to remote modem immediately.

S55=3

Escape characters sent with transmitted data.

ENHANCED MODE CHARACTER

Type:

Register

Format:

AT [cmds] S222=n [cmds]

Default:

126

Range:

0 - 127

Unit:

1 ASCII character

Description:

Sets the character used in standard mode to execute enhanced mode commands.

FACTORY DEFAULT PROFILE

Type:

Immediate

Format:

AT [cmds] &Fn [cmds]

Description:

Returns the command settings to the values found in one of the factory default profiles.

Command

Function

&F0

Restores enhanced mode settings.

&F1

Restores standard mode settings.

&F3

Restores V.32 synchronous mode settings.

FLOW CONTROL CHARACTER - XOFF

Type:

Register

Format:

AT [cmds] S57=n [cmds]

Default:

19

Range:

0 - 255

Unit:

ASCII

Description:

Sets the character used to represent the XOFF character.

FLOW CONTROL CHARACTER - XON

Type:

Register

Format:

AT [cmds] S56=n [cmds]

Default:

17

Range:

0 - 255

Unit:

ASCII

Description:

Sets the character used to represent the XON character.

FLOW CONTROL TYPE - DCE

Type:

Register

Format:

AT [cmds] S68=n [cmds]

Description:

Sets type of flow control used by the modem.

Command

Function

S68=0

Flow control disabled.

S68=2

Bidirectional RTS/CTS flow control enabled.

S68=3

Bidirectional XON/XOFF flow control enabled.

S68=4

Bidirectional XON/XOFF and RTS/CTS enabled.

S68=5

Flow control disabled; ENQ/ACK characters sent to remote modem.

S68=6

Bidirectional XON/XOFF enabled; ENQ/ACK characters sent to remote modem.

í S68=255

Use flow control specified in S58.

FLOW CONTROL TYPE - DTE

Type:

Register

Format:

AT [cmds] S58=n [cmds]

Description:

Sets type of flow control used by the DTE.

Command

Function

S58=0

Flow control disabled.

S58=1

Unidirectional RTS flow control enabled.

S58=2

Bidirectional RTS/CTS flow control enabled.

í S58=3

Bidirectional XON/XOFF flow control enabled.

S58=4

Bidirectional XON/XOFF and RTS/CTS enabled.

S58=5

Flow control disabled; ENQ/ACK characters sent to remote modem.

S58=6

Bidirectional XON/XOFF enabled; ENQ/ACK characters sent to remote modem.

S58=7

Transparent XON/XOFF enabled.

FREQUENCY OFFSET

Type:

Read-only

Format:

AT [cmds] S77? [cmds]

Description:

Displays the frequency offset for the current connection.

GUARD TONE

Type:

Register

Format:

AT [cmds] S91=n [cmds]

Description:

Commands the modem to transmit a guard tone in V.22/V.22bis mode.

Command

Function

í S91=0

Guard tone disabled.

S91=1

1800Hz guard tone enabled.

S91=2

550Hz guard tone enabled.

INACTIVITY TIMER

Type:

Register

Format:

AT [cmds] S41=n [cmds]

Default:

0

Range:

0-255

Unit:

1 minute

Description:

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

LINE OUT PINS

Format:

AT [cmds] S102=n [cmds]

Default:

0

Range:

0 - 6

Description:

Selects the functions, if any, of pins 3 & 6 and 7 & 8 of the RJ-45 telephone line out jack.

Bit

Value

Function

1, 0

í 00

01

10

Pins 3 & 6 have no function.

Pins 3 & 6 are A/A1 signals.

Pins 3 & 6 are MI/MIC signals.

2

í 0

1

Pins 7 & 8 have no function; modem is in permissive or normal transmission level.

Pins 7 & 8 are to set the programmable transmission level.

LINE QUALITY

Type:

Read-only

Format:

AT [cmds] S78? [cmds]

Default:

N/A

Range:

0 - 100

Unit:

N/A

Description:

Displays the quality of the current connection. Larger numbers indicate a better connection.

LOCAL SERIAL PORT SPEED

Type:

Register

Format:

AT [cmds] S51=n [cmds]

Description:

Selects the speed at which the modem will communicate with the host computer.

Command

Function

S51=0

Set speed to 300bps.

S51=1

Set speed to 1200bps.

S51=2

Set speed to 2400bps.

S51=3

Set speed to 4800bps.

í S51=4

Set speed to 9600bps.

S51=5

Set speed to 19.2Kbps.

S51=252

Auto-detect speed from received "A" or "a" character. User may not type new command until result code is displayed.

S51=254

Auto-detect speed from received "A" or "a" character. This speed is used until disconnect, reset, or received break. User may type new command before result code is displayed. If no command has been entered since the modem has been powered on, assume next command will be at 19.2Kbps.

S51=255

Auto-detect speed from received "A" or "a" character. This speed is used until disconnect, reset, or received break. User may type new command before result code is displayed. If no command has been entered since the modem has been powered on, assume next command will be at 9600bps.

LOCK SERIAL PORT

Type:

Register

Format:

AT [cmds] S66=n [cmds]

Description:

Sets operation of serial port speed.

Command

Function

í S66=0

Serial port speed follows connect speed.

S66=1

Serial port speed locked.

S66=2

Serial port speed locked. Use flow control in connect mode but not in command mode.

PRODUCT ID NUMBER

Type:

Register

Format:

AT [cmds] S49=n [cmds]

Description:

Selects what the modem will report as its product ID number.

Command

Function

í S49=0

Modem reports normal ID number.

S49=1

Modem reports 123 as its ID number.

S49=2

Modem reports 965 (TrailBlazer Plus) as its ID number.

PROMPT CHARACTER

Type:

Register

Format:

AT [cmds] S59=n [cmds]

Default:

0

Range:

0 - 255

Unit:

1 ASCII character

Description:

Sets what character will be used as a prompt when in command mode. If S59 is set to 0 then no prompt will be given.

PROTOCOL/SPEED

Type:

Register

Format:

AT [cmds] S50=n [cmds]

Description:

Selects the protocol used for communications.

Command

Function

í S50=0

Auto-detect fastest common protocol.

S50=1

Use Bell 103.

S50=2

Use Bell 212A or V.22.

S50=3

Use V.22bis.

S50=6

Use V.32.

S50=254

Use speed of last AT command.

PROTOCOL SELECTION

Type:

Register

Format:

AT [cmds] S90=n [cmds]

Description:

Selects which protocol will be used when making 1200bps connections.

Command

Function

í S90=0

Use Bell 212A.

S90=1

Use V.22.

REPORT INFORMATION

Type:

Immediate

Format:

AT [cmds] In [cmds]

Description:

Displays information requested.

Command

Function

I0

Reports modem model and revision.

I1

Reports total of error codes for executed tests.

I2

Reports the current connect mode.

I4

Reports current connection statistics.

RESULT CODES

Type:

Configuration

Format:

AT [cmds] Qn [cmds]

Description:

Selects when result codes will be reported.

Command

Function

í Q0

All result codes will be reported.

Q1

Only remote result codes will be reported.

Q2

Only local result codes will be reported.

Q3

No result codes will be reported.

Q4

All remote result codes will be reported; local result codes will only be reported if an ATD or ATA command was entered. Modem does not report the RING result code in any mode.

Q5

Local result codes will only be reported if an ATD or ATA command was entered. Modem does not report the RING result code in any mode.

Q6

All remote result codes will be reported; modem will not report basic result codes when in answer mode. Modem does not report the RING result code in any mode.

Q7

Modem will not report remote result codes. Modem will not report local basic result codes when in answer mode. Modem does not report the RING result code in any mode.

Q8

All remote result codes will be reported; local result codes will only be reported if the local modem Is originating.

Q9

Local result codes will only be reported if the local modem Is originating.

RESULT CODES

Type:

Configuration

Format:

AT [cmds] Xn [cmds]

Description:

Enables dial tone detection and selects which result codes the computer will return.

Command

Function

X0

Busy and dial tone detection disabled; basic result codes only enabled.

í X1

Busy and dial tone detection enabled; all standard result codes enabled.

X2

Busy and dial tone detection enabled; all standard and MNP result codes enabled.

X10

Busy and dial tone detection disabled; basic result codes only enabled.

X11

Busy and dial tone detection disabled; basic result codes with connect speed enabled.

X12

Busy tone detection disabled, dial tone detection enabled; basic result codes with connect speed enabled.

X13

Busy tone detection enabled, dial tone detection disabled; basic result codes with connect speed enabled.

X14

Busy and dial tone detection enabled; basic result codes with connect speed enabled.

RETRAIN

Type:

Immediate

Format:

AT [cmds] &R [cmds]

Description:

Initiates a retrain.

SPEAKER VOLUME

Type:

Register

Format:

AT [cmds] S61=n [cmds]

Default:

150

Range:

0 - 255

Unit:

N/A

Description:

Sets the volume of the speaker to the number specified. Larger numbers indicate higher volume.

SPEED NEGOTIATION

Type:

Register

Format:

AT [cmds] S94=n [cmds]

Description:

Sets how the modem will negotiate the connection speed in regards to the S50 register.

Command

Function

S94=0

Modem will connect only at speed set by S50.

í S94=1

Modem will connect at any speed up to and including the speed set by S50.

S94=2

Modem will connect at any speed supported by the data modulation set by S50.

S94=3

Modem will connect at the speed set by S50 and, if possible, fall back to the next lowest speed.

SOFT RESET

Type:

Immediate

Format:

AT [cmds] Zn [cmds]

Description:

Resets modem and command settings to the profile specified.

Command

Function

í Z0

Restore profile specified by S255.

Z1

Restore profile 0.

Z2

Restore profile 1.

SOFT RESET

Type:

Immediate

Format:

AT [cmds] &En [cmds]

Description:

Resets modem and command settings to the profile specified.

Command

Function

í &E0

Restore profile specified by S255.

&E1

Restore profile 0.

&E2

Restore profile 1.

STORE CONFIGURATION

Type:

Immediate

Format:

AT [cmds] &Wn [cmds]

Description:

Stores the current configuration to the specified profile in non-volatile RAM.

Command

Function

í &W0

Store to profile specified by S255.

&W1

Store to profile 0.

&W2

Store to profile 1.

STORE TELEPHONE NUMBER

Type:

Configuration

Format:

AT [cmds] Nn=<#>\xxxx\ [cmds]

Description:

Stores the indicated telephone number at memory location n. The string xxxx between the backslashes sets an optional name for that stored number.

Note:

If additional commands are to be given after this command, the backslashes must be used even if there is no string between them.

TALK/DATA SWITCH

Type:

Register

Format:

AT [cmds] S105=n [cmds]

Description:

Controls the operation of SW2.

Command

Function

S105=0

Talk/Data switch disabled.

í S105=1

Talk/Data switch enabled.

S105=2

Talk/Data switch enabled when modem is on hook.

USER PROFILE

Type:

Register

Format:

AT [cmds] S255=n [cmds]

Description:

Sets which user profile will be used as the default.

Command

Function

S255=0

Default profile set by SW3.

S255=1

Modem will load profile 0 by default. Auto-dial functions use first stored number.

S255=2

Modem will load profile 1 by default. Auto-dial functions use second stored number.

V.32 ANSWER MODE TIMER

Type:

Register

Format:

AT [cmds] S93=n [cmds]

Default:

8

Range:

3 - 255

Unit:

.1 second

Description:

Sets the amount of time that, when in answer mode, the modem will wait for a V.32 originate sequence before dropping down to the next slowest protocol.

VOICE MODE

Type:

Immdeiate

Format:

AT [cmds] G [cmds]

Description:

Commands the modem to break the data connection and go on-hook so that the line may be used for voice mode. If the telephone’s handset is picked up, the call will not be disconnected.

XOFF REISSUE

Type:

Register

Format:

AT [cmds] S65=n [cmds]

Description:

Selects whether the modem will reissue XOFF characters if the DTE continues to transmit after an XOFF.

Command

Function

í S65=0

Modem will not reissue XOFF characters.

S65=1

Modem will reissue XOFF characters.

XON HANDLING

Type:

Register

Format:

AT [cmds] S69=n [cmds]

Description:

Sets how the modem processes XON characters coming from the DTE.

Command

Function

í S69=0

XON character is trapped by modem.

S69=1

XON character is passed to remote modem.

S69=2

XON character trapped by modem if it is in XOFF state; otherwise, it is passed to remote modem.