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SNM50

DIGICOM SPA

SNM50

Card Type

Modem

Chip Set

Unidentified

I/O Options

Power, leased line, switched line, 25-pin serial port

Maximum Modem Rate

33.6Kbps

Maximum Fax Rate

14.4Kbps

Data Modulation Protocol

ITU-T V.21, V.22, V.22bis,V.23, V.32, V.32bis, V.34, V.34+

Fax Modulation Protocol

V.17, V.29, V.27

Error Correction/Compression

MNP5, V.42, V.42bis

Fax Class

Class I

Data Bus

External

CONNECTIONS

Function

Label

Function

Label

Power

CN1

Switched line (RJ-11 connector)

CN4

25-pin serial port

CN2

Power switch

SW1

Leased line (RJ-11 connector)

CN3

   

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

PWR

Green

On

Power is on

PWR

Green

Off

Power is off

DSR

Red

On

Modem is ready

DSR

Red

Off

Modem is not ready

DTR

Red

On

Computer is ready

DTR

Red

Off

Computer is not ready

TD

Red

On

Modem is transmitting data

TD

Red

Off

Modem is not transmitting data

CTS

Red

On

CTS signal is high. TA ready to send data

CTS

Red

Off

CTS signal is low

RD

Red

On

Modem is receiving data

RD

Red

Off

Modem is not receiving data

DCD

Red

On

Data carrier present

DCD

Red

Off

Data carrier not present. Connection not established

TST

Red

On

Unit is conducting a test

TST

Red

Off

Unit not conducting a test

LNE

Red

On

Modem is off-hook

LNE

Red

Blinking

Modem in back-up

LNE

Red

Off

Modem is on-hook

SUPPORTED COMMAND SET

Basic AT Commands

AT, A/

A, C, E, H, M, Q, V, X, Y, Z

&F, &M, &T, &X

S Registers

Unidentified

Note: See MHI Help File for full command documentation.

PROPRIETARY AT COMMAND SET

COMMAND PORT

Type:

Configuration

Format:

AT [cmds] &Yn [cmds]

Description:

Enables/disables command port

Command

Function

&Y0

Command port disabled

&Y1

Command port enabled

COMMUNICATION PROTOCOLS

Type:

Configuration

Format:

AT [cmds] Bn [cmds]

Description:

Selects the communication protocol for data calls

Command

Protocol

B0

CCITT modulation with fixed carrier

CONNECT MODE

Type:

Configuration

Format:

AT [cmds] &En [cmds]

Description:

Controls the type of connection the modem will operate in

Command

Function

í &E0

Normal mode enabled

&E1

MNP/V.42 buffered auto-reliable mode enabled

&E2

V.42 sequence in auto-reliable mode; normal data mode if V.42 is not detected

&E3

V. 42 reliable mode enabled. Disconnect if fails

&E4

MNP auto-reliable mode; normal data mode if MNP is not detected

&E5

MNP reliable mode enabled. Disconnect if fails

&E6

MNP/V. 42 auto-reliable mode; normal data mode if error correction is not detected

&E7

MNP/V. 42 reliable mode enabled. Disconnect if fails

DATA SET READY (DSR) & DATA CARRIER DETECT (DCD)

Type:

Configuration

Format:

AT [cmds] &Cn [cmds]

Description:

Selects whether the DSR & DCD option is enabled or disabled

Command

Function

í &C0

DSR & DCD forced high

&C1

DSR & DCD are related to modulation standard

&C2

DSR forced high

&C3

DCD forced high

&C4

DSR & DCD forced high. When modem disconnects, DCD goes off for 2 seconds

&C5

DSR & DCD forced high. If DTR goes off or modem disconnects, DSR & DCD go off for 500ms

DATA TERMINAL READY (DTR)

Type:

Configuration

Format:

AT [cmds] &Dn [cmds]

Description:

Selects modem response to DTR

Command

Function

í&D0

DTR override

&D1

DTR toggle causes online command mode

&D2

Normal DTR operations

&D3

Resets on receipt of DTR

DIAL

Type:

Immediate

Format:

AT [cmds] D<#> [cmds]

Description:

Dials telephone number 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

DR

Reverse mode enabled

DP

Pulse dialing enabled

DN

Dial stored telephone number

DT

Tone dialing enabled

DW

Dialing resumed following dial tone detection

D,

Dialing paused

D!

Flash function initiated. Modem commanded to go on-hook for .5sec

D@

Wait for Quite Answer function enabled. Modem waits until a "quiet answer," a ring-back signal followed by 5 seconds of silence

D;

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

D/

Wait for .125sec

DISPLAY DIRECTORY NUMBER

Type:

Configuration

Format:

AT [cmds] &Nn [cmds]

Description:

Displays/deletes telephone directory

Command

Function

&N0

Displays directory

&N99

deletes entire telephone dorectory

DISPLAY STORED TELEPHONE NUMBER

Type:

Configuration

Format:

AT [cmds] Nn? [cmds]

Description:

Displays stored number n

DTE FLOW CONTROL

Type:

Configuration

Format:

AT [cmds] &Un [cmds]

Description:

Enables DTE flow control options

Command

Function

í &U0

Flow control disabled

&U1

XON/XOFF flow control enabled

&U2

XON/XOFF passed through remote terminal

&U4

RTS/CTS flow control enabled

&U5

Software & hardware flow control enabled

&U6

Software & hardware flow control enabled. XON/XOFF passed through remote terminal

DUMB MODE CONTROL

Type:

Configuration

Format:

AT [cmds] &Vn [cmds]

Description:

Controls access to command mode

Command

Function

í &V0

Normal command mode access enabled

&V1

Command mode access via escape sequence enabled

&V2

Dumb mode; all commands are ignored. Use front panel to change status

FALLBACK/FALL-FORWARD

Type:

Configuration

Format:

AT [cmds] &An [cmds]

Description:

Controls multi-standard detection feature which allows the modem to fall-forward and fallback if the modem signaling rate does not match the DTE

Command

Function

&A0

multi-standard detection disabled

&A1

multi-standard detection enabled

FRONT PANEL

Type:

Configuration

Format:

AT [cmds] &Sn [cmds]

Description:

Enables/disables front panel buttons

Command

Function

&S0

Front panel disabled

í &S1

Front panel enabled

GUARD TONE

Type:

Configuration

Format:

AT [cmds] &Gn [cmds]

Description:

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

Command

Function

&G0

Guard tone disabled

í &G2

1800Hz guard tone enabled

INTERFACE BUFFER

Type:

Configuration

Format:

AT [cmds] &In [cmds]

Description:

Allows the DTE to be set to a uniform rate regardless of the rate determined by the communications format selected

Command

Function

&I0

Constant speed interface to disabled DTE

í &I1

Constant speed interface enabled; CONNECT message indicates connect rate. Parity is transferred in transparent mode.

&I2

Constant speed interface enabled; CONNECT message indicates DTE rate. Parity is transferred in transparent mode.

&I3

Constant speed interface enabled; CONNECT message indicates connect rate. Parity is reconstructed by the modem.

LEASED LINE AUTO-HANDSHAKE

Type:

Configuration

Format:

AT [cmds] &Hn [cmds]

Description:

Enables/disables leased line auto-handshake

Command

Function

&H0

Leased line auto-handshake disabled

í &H1

Leased line auto-handshake enabled

LEASED LINE/SWITCHED LINE NETWORK SELECTION

Type:

Configuration

Format:

AT [cmds] &Ln [cmds]

Description:

Selects a leased line or switched line network connection

Command

Function

í &L0

Switched line

&L1

2 wire leased line

&L2

4 wire leased line

LINE MODULATION

Type:

Configuration

Format:

AT [cmds] Fn [cmds]

Description:

Determines modem modulation standard

Command

Function

F0

Multi-standard mode

F1

300bps

F3

1200/75bps

F4

1200bps

F5

2400bps

F6

4800bps

F7

7200bps

F8

9600bps

F9

12.0Kbps

F10

14.4Kbps

F11

16.8Kbps

F12

19.2Kbps

F13

21.6Kbps

F14

24.0Kbps

F15

26.4Kbps

F16

28.8Kbps

F17

31.2Kbps

F18

33.6Kbps

MODEM FLOW CONTROL

Type:

Configuration

Format:

AT [cmds] &Kn [cmds]

Description:

Enables flow control options

Command

Function

&K0

Flow control disabled

&K1

XON/XOFF flow control enabled

&K2

RTS/CTS flow control enabled

&K3

Software & hardware flow control enabled

ON-LINE

Type:

Immediate

Format:

AT [cmds] On [cmds]

Description:

Controls on-line command (data transmission) state options.

Command

Function

O0

On-line command mode with no retraining enabled

PULSE DIALING RATIO

Type:

Configuration

Format:

AT [cmds] &Pn [cmds]

Description:

Selects pulse dial make/break ratio

Command

Function

í &P0

40/60ms at 10pps (North America)

&P1

33/67ms at 10pps (Europe)

REPORT INFORMATION

Type:

Immediate

Format:

AT [cmds] In [cmds]

Description:

Displays information requested

Command

Function

I0

Reports modem type

I1

Reports software revision level

I2

Reports ROM checksum

I3

Reports identification in S38

I4

Reports product code

I8

Reports revision level

RTS/CTS

Type:

Configuration

Format:

AT [cmds] &Rn [cmds]

Description:

Selects RTS/CTS options

Command

Function

í &R0

CTS follows RTS. Register S26 delays CTS by value selected (0 - 2.55sec)

&R1

CTS forced high, RTS is ignored.

&R2

CTS force high

&R3

CTS always follows RTS

SPEAKER VOLUME

Type:

Configuration

Format:

AT [cmds] Ln [cmds]

Description:

Controls speaker volume

Command

Function

L0

Low volume setting

L1

Low volume setting

í L2

Medium volume setting

L3

Highest volume setting

STORE ACTIVE PROFILE

Type:

Configuration

Format:

AT [cmds] &Wn [cmds]

Description:

Writes the values for the active profile into the non-volatile RAM at location n.

Command

Function

&W0

Write the active profile to stored profile 0

&W1

Write the active profile to stored profile 1

&W2

Write the active profile to stored profile 2

&W3

Write the active profile to stored profile 3

&W4

Write the active profile to stored profile 4

&W5

Write the active profile to stored profile 5

&W6

Write the active profile to stored profile 6

&W7

Write the active profile to stored profile 7

&W8

Write the active profile to stored profile 8

&W9

Write the active profile to stored profile 9

&W99

Writes the 10 factory configurations in the 10 user profiles

STORE TELEPHONE NUMBER

Type:

Configuration

Format:

AT [cmds] Nn&Z [cmds]

Description:

Writes selected telephone numbers into the non-volatile memory at location n

SPECIAL COMMANDS

ASYNCHRONOUS DTR/1 MODE

Type:

Configuration

Format:

AT [cmds] *Dn [cmds]

Description:

Enables DTR/1 direct call in asynchronous mode

Command

Function

í *D0

DTR/1 disabled

*D1

DTR/1 enabled with CTS on in off-line

*D2

DTR/1 enabled with CTS off in off-line

AUTO-RELIABLE BUFFER/CHARACTER CONFIGURATION

Type:

Configuration

Format:

AT [cmds] #An [cmds]

Description:

Controls the handling of incoming data during auto-reliable time period

Command

Function

í #A0

Auto-reliable buffer and character disabled

#A1

Auto-reliable character enabled

#A2

Auto-reliable buffer enabled

#A3

Auto-reliable buffer and character enabled

BIT ERROR RATE THRESHOLD

Type:

Configuration

Format:

AT [cmds] #Qn [cmds]

Description:

Determines Bit Error Rate Threshold to initiate fall-forward/fallback retrain

Command

Function

#Q0

Standard bit error rate threshold: SQ=3 equivalent at bit error rate of 1*10-5

í #Q1

Alternative bit error rate threshold: SQ=2 equivalent at bit error rate of 1*10-3

BREAK OPTIONS

Type:

Configuration

Format

AT [cmds] *Yn [cmds]

Description:

Sets the method for break transmission

Command

Function

í *Y0

Expedited signaling, immediately send break

*Y1

Destructive signaling, buffers cleared, immediately send break

*Y2

In-sequence signaling, break sent in sequence with transmitted data

*Y3

Break signal ignored

C140-C141 CONTROL

Type:

Configuration

Format:

AT [cmds] *Tn [cmds]

Description:

Enables/disables C140 & C141 signal interface

Command

Function

í *T0

C140 & C141 signal interface disabled

*T1

C140 signal interface enabled

*T2

C141 signal interface enabled

*T3

C140 & C141 signal interface enabled

*T4

C140 & C141 signal interface enabled. C141 requests loop 3 with modem on-line

CALLING TONE

Type:

Configuration

Format:

AT [cmds] *Gn [cmds]

Description:

Controls whether the DTE will allow the modem to send a 1300Hz calling tone when originating

Command

Function

í *G0

Disable calling tone

*G1

Enable calling tone

DATA COMPRESSION

Type:

Configuration

Format:

AT [cmds] *En [cmds]

Description:

Enables/disables data compression

Command

Function

*E0

Data compression disabled

í *E1

Data compression enabled

DATA SET READY (DSR)

Type:

Configuration

Format:

AT [cmds] *Pn [cmds]

Description:

Selects DSR options

Command

Function

í *P0

DSR standard

*P1

DSR on for 200ms after aborted call

*P2

DSR follows DCD during handshake

*P3

DSR follows DCD during handshake and DSR wink

DETECTION PHASE

Type:

Configuration

Format:

AT [cmds] #En [cmds]

Description:

Enables/disables detection phase before the negotiation of V.42 protocol

Command

Function

#E0

Detection phase disabled

í #E1

Detection phase enabled

DIAL LINE BACK-UP

Type:

Configuration

Format:

AT [cmds] #Bn [cmds]

Description:

Controls dial line back-up selection

Command

Function

í #B0

Dial line back-up disabled

#B1

Dial line back-up enabled; when leased line is in failure the modem automatically uses switched line until power-down

#B2

Dial line back-up enabled with automatic look-back. When leased line is in failure, modem uses switched line for time specified by register S28

#B4

Dial line back-up controlled by C116 DTE interface circuit

#B5

Dial line back-up enabled with automatic look-back. When leased line is in failure, modem uses switched line for time specified by register S28. LEDs managed differently from #B2

DISPLAY BLACKLIST NUMBERS

Type:

Configuration

Format:

AT [cmds] *Bn [cmds]

Description:

Displays blacklist numbers

Command

Function

*B0

Displays delayed and forbidden numbers

*B1

Displays delayed numbers

*B2

Displays forbidden numbers

DISPLAY CONFIGURATION

Type:

Immediate

Format:

AT [cmds] *Cn [cmds]

Description:

Displays active configuration. At the end of the list, it is possible to display the error message relative to the connection state.

DISPLAY STORED NUMBER

Type:

Immediate

Format:

AT [cmds] *Nn [cmds]

Description:

Displays stored number for DTR/1 direct call in V.25bis mode

DTE SPEED

Type:

Configuration

Format:

AT [cmds] *In [cmds]

Description:

Controls DTE interface data rate

Command

Function

í *I0

Automode enabled

*I1

300bps

*I4

1200

*I5

2400bps

*I6

4800bps

*I7

7200bps

*I8

9600bps

*I10

14.4Kbps

*I11

19.2Kbps

*I13

38.4Kbps

*I14

57.6Kbps

*I15

115.2Kbps

EXTENDED RESULT CODES

Type:

Configuration

Format:

AT [cmds] #Xn [cmds]

Description:

Enables/disables extended code CONNECT messages to indicate buffer or error correction activation (ATX)

Command

Function

í #X0

Extended result codes disabled

#X1

/BUF and /REL messages enabled

#X2

Extended result codes enabled

#X3

Extended result codes enabled. ONL/OFL messages disabled in V.25bis

FLOW CONTROL DURING RETRAIN

Type:

Configuration

Format:

AT [cmds] #Kn [cmds]

Description:

Determines flow control handling during retrain phases

Command

Function

í #K0

Flow control option during retrain disabled

#K1

Flow control option during retrain follows &K

FLOW CONTROL TYPE

Type:

Configuration

Format:

AT [cmds] *Kn [cmds]

Description:

Sets type of flow control used by modem

Command

Function

í *K0

CTS forced high

*K1

XON/XOFF flow control enabled

*K2

CTS off during handshake

*K3

CTS off during handshake & XON/XOFF flow control enabled

*K4

CTS off in off-line

*K5

CTS off in off-line & XON/XOFF flow control enabled

HALF DUPLEX SIMULATION

Type:

Configuration

Format:

AT [cmds] #Hn [cmds]

Description:

Enables/disables half duplex simulation

Command

Function

í #H0

Half-Duplex simulation disabled

#H1

Half-Duplex simulation enabled

HANDSHAKE BREAK

Type:

Configuration

Format:

AT [cmds] #Pn [cmds]

Description:

Enables/disables handshake abort if DTE sends data during handshake

Command

Function

í #P0

Handshake abort enabled

#P1

Handshake abort disabled

LINE FLOW CONTROL

Type:

Configuration

Format:

AT [cmds] *Fn [cmds]

Description:

Controls the flow of data between local and remote modems

Command

Function

í *F0

Remote flow control disabled

*F1

Remote flow control enabled

MINIMUM LINE SPEED

Type:

Configuration

Format:

AT [cmds] #Fn [cmds]

Description:

Determines minimum data rate

Command

Function

í #F0

Function disabled. No minimum speed

#F1

300bps

#F3

1200/75bps

#F4

1200bps

#F5

2400bps

#F6

4800bps

#F7

7200bps

#F8

9600bps

#F9

12.0Kbps

#F10

14.4Kbps

#F11

16.8Kbps

#F12

19.2Kbps

#F13

21.6Kbps

#F14

24.0Kbps

#F15

26.4Kbps

#F16

28.8Kbps

#F17

31.2Kbps

#F18

33.6Kbps

OVERSPEED SELECTION

Type:

Configuration

Format:

AT [cmds] *On [cmds]

Description:

Sets type of flow control used by modem

Command

Function

í *O0

Overspeed +1%: -2.5%

*O1

Overspeed +2.3%: -2.5%

PREFIX DIALING

Type:

Configuration

Format:

AT [cmds] #Wn [cmds]

Description:

Enables the automatic dialing of a prefix before every number. Prefix is stored in location 19 of the memory

Command

Function

í #W0

Automatic prefix dialing enabled

#W1

Automatic prefix dialing disabled

REMOTE ACCESS CONTROL

Type:

Configuration

Format:

AT [cmds] #Tn [cmds]

Description:

Sets remote access control

Command

Function

#T0

Remote access control disabled

#T4

Modem enabled for remote access, download request and loop 2 remote test

í #T5

Remote access and download request disabled

#T6

Request for remote access control sent

#T7

Request for download of the configuration indicated by registers S65 and S66 sent

SIGNAL QUALITY ACTION CONTROL

Type:

Configuration

Format:

AT [cmds] *Qn [cmds]

Description:

Controls signal quality action

Command

Function

í *Q0

Signal quality action disabled

*Q1

Retrain enabled

*Q2

Fallback enabled (V.34, V.32bis, V.32, or V.22 mode)

*Q3

Disconnects after first aborted retrain

SPECIAL MODE

Type:

Configuration

Format:

AT [cmds] #Vn [cmds]

Description:

Selects V.23 full duplex special functioning mode

Command

Function

í #V0

V.23 automatic mode: 75bps transmit, 1200bps receive (originate), 1200bps transmit, 75bps receive (answer)

#V1

75bps transmit, 1200bps receive fixed

#V2

1200bps transmit, 75bps receive fixed

S-REGISTER DISPLAY

Type:

Immediate

Format:

AT [cmds] *S [cmds]

Description:

Displays values stored in S-registers

SYNCHRONOUS CLOCK CONTROL

Type:

Configuration

Format:

AT [cmds] *Xn [cmds]

Description:

Forces modemís transmit and receive clock at the DTE interface

Command

Function

*X0

Synchronous clocks are on in data mode only

*X1

Synchronous clocks are always on

TRANSMISSION LEVEL - LEASED

Type:

Configuration

Format:

AT [cmds] !Ln [cmds]

Default:

10

Range:

3-15

Unit:

-1 dBm

Description:

Sets the signal level for transmission over leased phone lines

TRANSMISSION LEVEL - SWITCHED

Type:

Configuration

Format:

AT [cmds] *Ln [cmds]

Default:

10

Range:

3-15

Unit:

-1 dBm

Description:

Sets the signal level for transmission over switched phone lines

V.25BIS DTR/1 STORED NUMBER

Type:

Immediate

Format

AT [cmds] *Zxxxx [cmds]

Description:

Stores a number for DTR/1 operation in V.25bis mode. Must be placed at the end of command string

V.25BIS MODE

Type:

Configuration

Format:

AT [cmds] *Vn [cmds]

Description:

Enables/disables V.25bis mode

Command

Function

*V0

V.25bis in DTR/2 asynchronous

*V1

V.25bis in DTR/1 synchronous/asynchronous (&M)

*V2

V.25bis in DTR/2 HDLC

*V7

Returns in AT mode