IPTools.net.ua

Modem Type

Data (synchronous/asynchronous)

Maximum Data Rate

28.8Kbps

Data Bus

External

Data Modulation Protocol

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

Error Correction/Compression

Motorola Codex

CONNECTIONS

Purpose

Location

Purpose

Location

RETURN button

BT1

Leased line out

CN3

DOWN button

BT2

120VAC power

CN4

ACROSS button

BT3

RS-232/422

CN5

ENTER button (Talk/Data)

BT4

Network control out

CN6

Switched line out

CN1

Network control in

CN7

Line in

CN2

Power switch

SW1

ELECTRICAL INTERFACE SELECTION

SW2/1

On

Off

TEST/BUSY OUT ON PIN 25

SW2/2

Off

On

FRONT PANEL CONFIGURATION

SW2/3

Off

On

RESET MEMORY

SW2/4

Off

On

COMMAND SETS

SW2/5

Off

On

FACTORY CONFIGURED - DO NOT ALTER

Switch

Position

SW2/6

Off

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

RD

Red

On

Modem is receiving data

RD

Red

Off

Modem is not receiving data

TR

Red

On

DTR signal is high

TR

Red

Off

DTR signal is low

RI/OH

Red

On

Switched line is off-hook or is ringing

RI/OH

Red

Off

Switched line is on-hook and is not ringing

TD

Red

On

Modem is transmitting data

TD

Red

Off

Modem is not transmitting data

CD

Red

On

Carrier signal detected

CD

Red

Off

Carrier signal not detected

RC/NC

Red

On

Modem is under remote or network control

RC/NC

Red

Off

Modem is under local control

ADAPTIVE RATE

Type:

Configuration

Format:

AT [cmds] *APn [cmds]

Example:

AT *EC0 *DC1 *AP0<CR>

Description:

Selects whether the modem will automatically adjust its speed according to line conditions.

Command

Function

*AP0

Adaptive rate disabled.

*AP1

Adaptive rate enabled.

ANSWER/ORIGINATE MODE

Type:

Configuration

Format:

AT [cmds] *CAn [cmds]

Example:

AT *CA2<CR>

Description:

Selects whether the modem is in answer or originate mode.

Command

Function

*CA0

Modem is in originate mode.

*CA1

Modem is in answer mode.

*CA2

Modem is in answer mode only if pin 11 of the serial interface is high.

*CA3

Modem switches to originate mode after auto-answer.

AUTO-ANSWER

Type:

Configuration

Format:

AT [cmds] *AAn [cmds]

Example:

AT *AA5 S0=3<CR>

Description:

Configures the modem�s response to an incoming call.

Command

Function

*AA0

Modem will not answer incoming call.

*AA1

Modem will answer incoming call on first ring.

*AA2

Modem will answer incoming call on second ring.

*AA3

Modem will answer incoming call on fourth ring.

*AA4

Modem will answer incoming call on eighth ring.

*AA5

Modem will answer according to register S0.

AUTO-ANSWER - SWITCHED LINE

Type:

Configuration

Format:

AT [cmds] *ASn [cmds]

Example:

AT *AS0 H1 DT555-1212<CR>

Description:

Selects whether the modem will answer an incoming switched line call while connected over the leased line.

Command

Function

*AS0

Modem will ignore incoming switched line call.

*AS1

Modem will disconnect from leased line to answer switched line call.

BLIND DIALING DELAY

Type:

Configuration

Format:

AT [cmds] *BDn [cmds]

Example:

AT *BD2 S6=3<CR>

Description:

Configures how long the modem will wait before it begins dialing when in blind dial mode.

Command

Function

*BD0

Modem will wait 2 seconds before dialing.

*BD1

Modem will wait 4 seconds before dialing.

*BD2

Modem will wait according to register S6.

BUFFER SIZE

Type:

Configuration

Format:

AT [cmds] *NBn [cmds]

Example:

AT *NB0<CR>

Description:

Selects the modem�s transmit/receive buffer size.

Command

Function

*NB0

Normal buffer size.

*NB1

Small buffer size.

BUSY OUT ON TEST MODE

Type:

Configuration

Format:

AT [cmds] *LLn [cmds]

Example:

AT *LL1 <CR>

Description:

Sends busy signal when modem is in a test mode.

Command

Function

*LL0

Do not send busy signal when modem is in test mode.

*LL1

Send busy signal when modem is in test mode.

BREAK TYPE

Type:

Configuration

Format:

AT [cmds] *BKn [cmds]

Example:

AT *BK0<CR>

Description:

Configures action of break signal.

Command

Function

*BK0

Break empties buffer and is sent immediately.

*BK1

Break does not empty buffer and is sent immediately.

*BK2

Break does not empty buffer and is sent in sequence.

CALLBACK DIAL TONE TIME

Type:

Register

Format:

AT [cmds] S45=n [cmds]

Example:

ATS45=2<CR>

Default:

5

Range:

0-10

Unit:

1 second

Description:

Sets the length of the dialtone generated by the callback feature to prompt for the password.

CALLBACK NUMBER SOURCE

Type:

Configuration

Format:

AT [cmds] *ZCn [cmds]

Example:

AT *ZC10 *ZIsnarf<CR>

Description:

Configures where the callback function will obtain the number to call.

Command

Function

*ZC0

Callback function disabled.

*ZC10

Callback function will dial the number provided by the remote user.

*ZC12

Callback function will dial the number stored in the memory location provided by the remote user.

CALLBACK ONLY MODE

Type:

Configuration

Format:

AT [cmds] *ZRn [cmds]

Example:

AT *ZR0 S0=2<CR>

Description:

Sets whether the modem is callback-only.

Command

Function

*ZR0

Modem will accept both normal calls and callback calls.

*ZR1

Modem will only accept callback calls.

CALLBACK PASSWORD

Type:

Configuration

Format:

AT [cmds] *ZIxxxx

Example:

AT *ZC10 *ZIsnarf<CR>

Description:

Sets the callback password to xxxx. The password must not be more than 10 characters.

CALLBACK PASSWORD TIME

Type:

Register

Format:

AT [cmds] S46=n [cmds]

Example:

ATS46=18<CR>

Default:

12

Range:

0-255

Unit:

1 second

Description:

Sets the length of time in which the callback password must be entered.

CALLBACK RINGBACK TONE

Type:

Configuration

Format:

AT [cmds] *ZSn [cmds]

Example:

AT *ZP2 *ZS1<CR>

Description:

Selects whether the modem will generate a ringback tone upon receiving the correct callback password.

Command

Function

*ZS0

Modem will not generate ringback tone.

*ZS1

Modem will generate ringback tone.

CALLBACK SECURITY

Type:

Configuration

Format:

AT [cmds] *ZVn [cmds]

Example:

AT *ZV1 S0=1<CR>

Description:

Enables security for the callback function.

Command

Function

*ZV0

Disables password verification and disables callback mode..

*ZV1

Enables password verification by the modem.

CALLBACK STORED NUMBER

Type:

Configuration

Format:

AT [cmds] *ZCn [cmds]

Example:

AT *ZC3 *ZIsnarf<CR>

Description:

Callback function will dial the number stored in memory location n.

CALLBACK TONES

Type:

Configuration

Format:

AT [cmds] *ZPn [cmds]

Example:

AT *ZP2 *ZS1<CR>

Description:

Selects which tones the callback function will use to indicate operation.

Command

Function

*ZP0

Callback tones disabled.

*ZP1

Generate dialtone to prompt for password.

*ZP2

Generate answer tone after password.

*ZP3

Generate both tones.

CALL WAIT TIMER

Type:

Configuration

Format:

AT [cmds] *TTn [cmds]

Example:

AT *TT5 S7=120<CR>

Description:

Sets the length of time that the modem will wait for a call to succeed.

Command

Function

*TT0

Modem will wait for 30 seconds.

*TT1

Modem will wait for 45 seconds.

*TT2

Modem will wait for 60 seconds.

*TT3

Modem will wait for 90 seconds.

*TT4

Modem will wait for 180 seconds.

*TT5

Modem will wait according to register S7.

CD SIGNAL

Type:

Configuration

Format:

AT [cmds] &Cn [cmds]

Example:

AT &C3 *RS1 *SR1<CR>

Description:

Configures the behavior of the carrier detect signal.

Command

Function

&C0

CD forced high.

&C1

CD normal.

&C2

CD forced high except during handshaking and disconnecting.

&C3

CD follows remote RTS signal.

&C4

CD forced high except during disconnecting.

CD SIGNAL REACTION

Type:

Configuration

Format:

AT [cmds] *CDn [cmds]

Example:

AT *CD2<CR>

Description:

Configures the modem�s response to loss of the carrier signal.

Command

Function

*CD0

Modem ignores low CD.

*CD1

Modem will wait for 3 seconds of low CD before disconnecting.

*CD2

Modem will wait for 7 seconds of low CD before disconnecting.

*CD3

Modem will wait according to register S10.

COMPRESSION

Type:

Configuration

Format:

AT *DCn

Example:

AT *EC0 *DC1 *AP0<CR>

Description:

Selects data compression.

Command

Function

*DC0

Data compression disabled.

*DC1

Data compression enabled.

CONNECT MESSAGE

Type:

Configuration

Format:

AT [cmds] *MSn [cmds]

Example:

AT *MS0<CR>

Description:

Selects whether CONNECT message is sent before or after the carrier detect signal is high.

Command

Function

*MS0

CONNECT sent after CD is high.

*MS1

CONNECT sent before CD is high.

CONNECT MODE

Type:

Configuration

Format:

AT [cmds] *SMn [cmds]

Example:

AT *SM1 DT555-1212<CR>

Description:

Sets connect mode.

Command

Function

*SM1

Direct mode.

*SM0

Normal mode.

*SM2

Reliable mode.

*SM3

Auto-reliable mode.

*SM4

At 1200bps or slower, normal mode will be used for asynchronous connections and direct mode for synchronous connections.

CONNECTION SPEED LOWER LIMIT

Type:

Configuration

Format:

AT [cmds] *MNn [cmds]

Example:

AT *MN6 *MX14 *MM11<CR>

Description:

Sets slowest allowed connection speed.

Command

Function

*MN0

Select 300bps minimum speed.

*MN1

Select 1200bps minimum speed.

*MN2

Select 2400bps minimum speed.

*MN3

Select 4800bps minimum speed.

*MN4

Select 7200bps minimum speed.

*MN5

Select 9600bps minimum speed.

*MN6

Select 12Kbps minimum speed.

*MN7

Select 14.4Kbps minimum speed.

*MN8

Select 16.8Kbps minimum speed.

*MN9

Select 19.2Kbps minimum speed.

*MN10

Select 21.6Kbps minimum speed.

*MN11

Select 24Kbps minimum speed.

*MN12

Select 26.4Kbps minimum speed.

*MN13

Select 28.8Kbps minimum speed.

CONNECTION SPEED UPPER LIMIT

Type:

Configuration

Format:

AT [cmds] *MXn [cmds]

Example:

AT *MN6 *MX14 *MM11<CR>

Description:

Sets fastest allowed connection speed.

Command

Function

*MX0

Select 300bps maximum speed.

*MX1

Select 1200bps maximum speed.

*MX2

Select 2400bps maximum speed.

*MX3

Select 4800bps maximum speed.

*MX4

Select 7200bps maximum speed.

*MX5

Select 9600bps maximum speed.

*MX6

Select 12Kbps maximum speed.

*MX7

Select 14.4Kbps maximum speed.

*MX8

Select 16.8Kbps maximum speed.

*MX9

Select 19.2Kbps maximum speed.

*MX10

Select 21.6Kbps maximum speed.

*MX11

Select 24Kbps maximum speed.

*MX12

Select 26.4Kbps maximum speed.

*MX13

Select 28.8Kbps maximum speed.

CTS SIGNAL

Type:

Configuration

Format:

AT [cmds] *CTn [cmds]

Example:

AT *CT0<CR>

Description:

Selects the function of the CTS signal.

Command

Function

*CT0

CTS forced high.

*CT1

CTS normal.

*CT2

CTS forced high in command mode, forced low during handshaking and retraining, and follows RTS in data mode.

*CT3

CTS forced high in asynchronous mode and behaves like *CT2 in synchronous mode.

*CT4

CTS follows RTS.

CTS/RTS DELAY

Type:

Configuration

Format:

AT [cmds] *DLn [cmds]

Example:

AT *DL1 O<CR>

Description:

When CTS is set to follow RTS, sets the delay between the RTS signal going high and CTS following.

Command

Function

*DL0

CTS follows RTS immediately.

*DL1

CTS follows RTS after 15ms.

*DL2

CTS follows RTS after 60ms.

*DL3

CTS follows RTS after 90ms.

*DL4

CTS follows RTS according to S26.

DIAL

Type:

Immediate

Format:

AT [cmds] D<#> [; cmds]

Example:

AT H1 DT 9W *70, 1(303) 555-1212<CR>

Description:

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

Modifier

Function

DK

Dialing paused for amount of time specified in S8 register.

DP

Pulse dialing enabled.

DR

Dial in answer mode.

DS=n

Number in memory location n dialed.

DT

Tone dialing enabled.

DW

Dialing resumed following dial tone detection.

D,

Dialing paused for amount of time specified in S8 register.

D<

Dialing paused for amount of time specified in S8 register.

D!

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

D@

Modem waits for a ring-back signal followed by silence up to the time specified in S7 prior to executing the rest of the dial string.

D&

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

D;

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

D:

Dialing resumed following dial tone detection.

DIAL PAUSE TIME

Type:

Configuration

Format:

AT [cmds] *DPn [cmds]

Example:

AT *DP9 S8=1<CR>

Description:

Sets the time the modem will wait when it encounters a pause symbol in a dial string.

Command

Function

*DP0

Modem will pause for 3 seconds.

*DP1

Modem will pause for 6 seconds.

*DP2

Modem will pause for 9 seconds.

*DP3

Modem will pause for 12 seconds.

*DP4

Modem will pause according to register S8.

DIAL RESTRICTIONS

Type:

Configuration

Format:

AT [cmds] *ZDn [cmds]

Example:

AT *ZD10 S0=1<CR>

Description:

Sets the restrictions on dial commands.

Command

Function

*ZD0

Unrestricted dialing.

*ZD1

Redial and auto-redial disabled.

*ZD2

Manual dial, redial, and auto-redial disabled; only stored numbers may be dialed.

DIAL TONE WAIT TIME

Type:

Configuration

Format:

AT [cmds] *DDn [cmds]

Example:

AT *DD9 S7=1<CR>

Description:

Configures how long the modem will wait for a dial tone.

Command

Function

*DD0

Modem will wait 2 seconds for dial tone.

*DD1

Modem will wait 3 seconds for dial tone.

*DD2

Modem will wait 4 seconds for dial tone.

*DD3

Modem will wait 6 seconds for dial tone.

*DD4

Modem will wait 12 seconds for dial tone.

*DD5

Modem will wait 15 seconds for dial tone.

*DD6

Modem will wait 20 seconds for dial tone.

*DD7

Modem will wait 30 seconds for dial tone.

*DD8

Modem will wait 40 seconds for dial tone.

*DD9

Modem will wait according to register S7.

DIAL TYPE SELECTION

Type:

Configuration

Format:

AT [cmds] *PTn [cmds]

Example:

AT *PT0 D555-1212<CR>

Description:

Selects which type of dialing will be used as default.

Command

Function

*PT0

Tone dialing will be used as default.

*PT1

Pulse dialing will be used as default.

*PT2

Attempt to use tone dialing; if this fails, use pulse dialing.

DIAL STORED PHONE NUMBER

Type:

Immediate

Format:

AT [cmds] *DSn

Example:

ATM0 *DS5<CR>

Description:

Dials a stored phone number.

DISCONNECT BUFFER MODE

Type:

Configuration

Format:

AT [cmds] *DBn [cmds]

Example:

AT *DB0<CR>

Description:

Configures when the modem will disconnect if there is data in the transmit or receive buffers.

Command

Function

*DB0

Modem will disconnect immediately.

*DB1

Modem will disconnect after time in S38 or when buffers have emptied, whichever occurs first.

*DB2

Modem will wait until buffers have emptied, then disconnect after time in S38.

*DB3

Modem will disconnect after time in S38.

DISCONNECT SEQUENCE

Type:

Configuration

Format:

AT [cmds] *MDn [cmds]

Example:

AT *MD0 <CR>

Description:

Selects whether the modem will inform the remote modem before disconnecting.

Command

Function

*MD0

Modem disconnects without signalling the remote modem.

*MD1

Modem signals the remote modem to disconnect.

DISPLAY STORED NUMBERS

Type:

Immediate

Format:

AT [cmds] *NDn [cmds]

Example:

AT*CN3,555-1212 *ND<CR>

Description:

Displays the phone number in the memory location indicated. If no location is indicated they will all be displayed.

DSR SIGNAL

Type:

Configuration

Format:

AT [cmds] *MRn [cmds]

Example:

AT *MR0<CR>

Description:

Selects the function of the DSR signal.

Command

Function

*MR0

DSR normal.

*MR1

DSR forced high.

*MR2

DSR follows DTR.

*MR3

DSR normal, except forced low on disconnect.

*MR4

DSR follows DTR, except forced low on disconnect.

DTR CHANGE DELAY

Type:

Configuration

Format:

AT [cmds] *DTn [cmds]

Example:

AT*DT0 S25=2<CR>

Description:

Sets maximum time a change in the DTR signal will be ignored.

Command

Function

*DT0

DTR will be ignored according to register S25.

*DT1

DTR will be ignored for 10 seconds.

*DT2

DTR will be ignored for 15 seconds.

DTR DIALING

Type:

Configuration

Format:

AT [cmds] *DAn [cmds]

Example:

AT *DA1 DT555-1212<CR>

Description:

Sets the DTR dialing function to dial the number at memory location n.

DTR SIGNAL

Type:

Configuration

Format:

AT [cmds] &Dn [cmds]

Example:

AT &D1<CR>

Description:

Configures the behavior of the Data Terminal Ready signal.

Command

Function

&D0

DTR forced high.

&D1

Modem will enter command mode on low DTR.

&D2

Modem will disconnect on low DTR.

&D3

Modem will disconnect and reset on low DTR.

&D4

DTR dialing enabled.

&D5

On high DTR, modem will answer an incoming call, or enable DTR dialing if no call is detected. Modem will disconnect on low DTR.

&D6

On low DTR, modem will disconnect and will not dial or answer an incoming call until DTR is high again.

ERROR CORRECTION IDENTIFICATION

Type:

Configuration

Format:

AT [cmds] *SLn [cmds]

Example:

AT *EC1 *SL1<CR>

Description:

Selects what type of error correction the modem will identify itself with to remote modems.

Command

Function

*SL0

Modem will identify itself as MNP5 modem.

*SL1

Modem will identify itself as Motorola Codex modem.

ERROR CORRECTION MODE

Type:

Configuration

Format:

AT [cmds] *ECn [cmds]

Example:

AT *EC0 *DC1 *AP0<CR>

Description:

Selects active error correction protocols.

Command

Function

*EC0

MNP and LAPM enabled.

*EC1

LAPM only enabled.

*EC2

MNP only enabled.

EXTERNAL INITIALIZATION

Type:

Configuration

Format:

AT [cmds] *OPn [cmds]

Example:

AT *OC1 *OP14 <CR>

Description:

Selects the profiles for the external initialization function.

Command

Function

*OP0

External initialization disabled.

*OP1

Select profile 2 on low signal, and profile 1 on high signal.

*OP2

Select profile 3 on low signal, and profile 1 on high signal.

*OP3

Select profile 4 on low signal, and profile 1 on high signal.

*OP4

Select profile 1 on low signal, and profile 2 on high signal.

*OP5

Select profile 3 on low signal, and profile 2 on high signal.

*OP6

Select profile 4 on low signal, and profile 2 on high signal.

*OP7

Select profile 1 on low signal, and profile 3 on high signal.

*OP8

Select profile 2 on low signal, and profile 3 on high signal.

*OP9

Select profile 4 on low signal, and profile 3 on high signal.

*OP10

Select profile 1 on low signal, and profile 4 on high signal.

*OP11

Select profile 2 on low signal, and profile 4 on high signal.

*OP12

Select profile 3 on low signal, and profile 4 on high signal.

EXTERNAL INITIALIZATION PIN SELECT

Type:

Configuration

Format:

AT [cmds] *OCn [cmds]

Example:

AT *OC1 *OP14 <CR>

Description:

Selects which pin will control the external initialization function.

Command

Function

*OC0

External initialization controlled by pin 14.

*OC1

External initialization controlled by pin 20.

FLOW CONTROL

Type:

Configuration

Format:

AT [cmds] *MFn [cmds]

Example:

AT *MF1 *DF1 *FL5<CR>

Description:

Selects flow control.

Command

Function

*MF0

Flow control disabled.

*MF1

Flow control enabled.

FLOW CONTROL TYPE

Type:

Configuration

Format:

AT [cmds] *FLn [cmds]

Example:

AT *MF1 *DF1 *FL5<CR>

Description:

Sets type of flow control used by modem.

Command

Function

*FL0

Flow control disabled.

*FL1

XON/XOFF flow control enabled.

*FL2

CTS/DTR flow control enabled.

*FL3

CTS/RTS flow control enabled.

*FL4

XON/XOFF pass-through flow control enabled.

*FL5

Synchronous transmit clock signal flow control enabled.

HANDSHAKE OPTIONS

Type:

Configuration

Format:

AT [cmds] *FCn [cmds]

Example:

AT *FC0<CR>

Description:

Disables various parts of the handshake sequence.

Command

Function

*FC0

Normal handshake sequence.

*FC1

Billing delay removed and auto-baud tone shortened by 1 second.

*FC2

*FC1 plus training time is shortened by 2 seconds in V.32 and V.32bis modes.

*FC3

*FC2 plus negotiation of error correction and compression is removed.

INACTIVITY TIMER

Type:

Configuration

Format:

AT [cmds] *SIn [cmds]

Example:

AT *SI5 S30=40<CR>

Description:

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

Command

Function

*SI0

Inactivity timer disabled.

*SI1

Modem will disconnect after 3 minutes of inactivity.

*SI2

Modem will disconnect after 10 minutes of inactivity.

*SI3

Modem will disconnect after 20 minutes of inactivity.

*SI4

Modem will disconnect after 30 minutes of inactivity.

*SI5

Modem will disconnect according to register S30.

LEASED LINE BACKUP - HOLD BACKUP CONNECTION

Type:

Configuration

Format:

AT [cmds] *HDn [cmds]

Example:

AT *HD2 <CR>

Description:

Configures modem to hold switched line connection while testing the leased line.

Command

Function

*HD0

Do not hold connection.

*HD1

Hold connection for 1 minute.

*HD2

Hold connection for 2 minutes.

*HD3

Hold connection for 3 minutes.

*HD4

Hold connection for 4 minutes.

*HD5

Hold connection for 5 minutes.

LEASED LINE BACKUP - RESTORAL OPTIONS

Type:

Configuration

Format:

AT [cmds] *REn [cmds]

Example:

AT *RE0 D555-1212<CR>

Description:

Selects what will initiate the restoral of a leased line connection.

Command

Function

*RE0

Restoral disabled.

*RE1

Modem will restore connection only when the Talk/Data button is pressed.

*RE2

Modem will restore connection when DTR signal goes high.

*RE3

Modem will restore connection when ITU-T circuit 116 goes high.

*RE4

Modem will restore connection automatically.

*RE5

Modem will enable command set when DTR signal goes high.

*RE6

Modem will enable command set when ITU-T circuit 116 goes high.

LEASED LINE BACKUP RETURN TIME

Type:

Configuration

Format:

AT [cmds] *LEn [cmds]

Example:

AT*LE1<CR>

Description:

Sets the amount of time until the modem will reconnect to the leased line connection.

Command

Function

*LE0

Modem will reconnect when the Talk/Data button is pressed.

*LE1

Modem will reconnect after 15 minutes.

*LE2

Modem will reconnect after 30 minutes.

*LE3

Modem will reconnect after 1 hour.

*LE4

Modem will reconnect after 2 hours.

*LE5

Modem will reconnect after 4 hours.

LEASED LINE BACKUP THRESHHOLD

Type:

Configuration

Format:

AT [cmds] *DIn [cmds]

Example:

AT *DI1 O<CR>

Description:

Sets the number of retrains at which the modem will initiate a leased-line backup procedure.

Command

Function

*DI0

Backup initiated after 3 retrains in 5 minutes at high-speed connection, or 6 retrains in 5 minutes for low-speed connection.

*DI1

Backup initiated after 6 retrains in 10 minutes at high-speed connection, or 12 retrains in 10 minutes for low-speed connection.

*DI2

Backup initiated after 5 retrains in 5 minutes at high-speed connection, or 10 retrains in 5 minutes for low-speed connection.

*DI3

Backup initiated after 10 retrains in 10 minutes at high-speed connection, or 20 retrains in 10 minutes for low-speed connection.

LINE TYPE

Type:

Configuration

Format:

AT [cmds] &Ln [cmds]

Example:

AT &L2 H1 DT555-1212<CR>

Description:

Selects line type.

Command

Function

&L0

Switched line.

&L1

2-wire leased line.

&L2

4-wire leased line.

LINK STORED NUMBERS

Type:

Configuration

Format:

AT [cmds] *LNm,n [cmds]

Example:

AT *LN1,2 <CR>

Description:

Links two stored phone numbers in sequence so that if one fails, the next one will be dialed. If the second number is omitted, the link from the first number will be cleared.

LOCAL SERIAL PORT SPEED

Type:

Configuration

Format:

AT [cmds] *DEn [cmds]

Example:

AT *DE16 *OS0 *SC1<CR>

Description:

Sets serial port speed.

Command

Function

*DE2

Sets 300bps speed.

*DE3

Sets 600bps speed.

*DE4

Sets 1200bps speed.

*DE5

Sets 2400bps speed.

*DE6

Sets 4800bps speed.

*DE7

Sets 7200bps speed.

*DE8

Sets 9600bps speed.

*DE9

Sets 12Kbps speed.

*DE10

Sets 14.4Kbps speed.

*DE11

Sets 16.8Kbps speed.

*DE12

Sets 19.2Kbps speed.

*DE13

Sets 21.6Kbps speed.

*DE14

Sets 24Kbps speed.

*DE15

Sets 38.4Kbps speed.

*DE16

Sets 57.6Kbps speed.

*DE17

Sets 64Kbps speed.

*DE18

Sets 72Kbps speed.

*DE19

Sets 76.8Kbps speed.

*DE20

Sets 96Kbps speed.

*DE21

Sets 115.2Kbps speed.

*DE22

Sets speed automatically.

*DE23

Sets 48Kbps speed.

*DE24

Sets 56Kbps speed.

*DE25

Sets 26.4Kbps speed.

*DE26

Sets 28.8Kbps speed.

*DE28

Sets 128Kbps speed.

LOCAL SERIAL PORT SPEED ADJUST

Type:

Configuration

Format:

AT [cmds] *OSn [cmds]

Example:

AT *DE16 *OS0 *SC 1<CR>

Description:

Sets the maximum amount to adjust the local serial port speed by.

Command

Function

*OS0

Adjust local serial port speed by no more than -1%.

*OS1

Adjust local serial port speed by no more than -2.5%.

LOCK SERIAL PORT

Type:

Configuration

Format:

AT [cmds] *SCn [cmds]

Example:

AT *DE16 *OS0 *SC1<CR>

Description:

Sets operation of serial port speed.

Command

Function

*SC0

Serial speed follows connect speed.

*SC1

Serial speed locked.

LOOPBACK TEST ON PIN 18

Type:

Configuration

Format:

AT [cmds] *LAn [cmds]

Example:

AT*LA0<CR>

Description:

Controls whether the modem will perform a local analog loopback test when pin 18 goes high.

Command

Function

*LA0

Pin 18 has no function.

*LA1

Pin 18 going high causes the modem to perform local analog loopback test.

LOOPBACK TEST ON PIN 21

Type:

Configuration

Format:

AT [cmds] *LDn [cmds]

Example:

AT*LD0<CR>

Description:

Controls whether the modem will perform a remote digital loopback test when pin 21 goes high.

Command

Function

*LD0

Pin 21 has no function.

*LD1

Pin 21 going high causes the modem to perform remote digital loopback test.

NETWORK OPTIMIZATION

Type:

Configuration

Format:

AT [cmds] *NCn [cmds]

Example:

AT *NC0<CR>

Description:

Selects options to make the modem operate more efficiently when using the network control option.

Command

Function

*NC0

Normal operation.

*NC1

Level 1 optimization; limits serial port rate to 21.6Kbps.

*NC2

Level 2 optimization; limits serial port rate to 19.2Kbps.

NRZI INTERFACE

Type:

Configuration

Format:

AT [cmds] *DFn [cmds]

Example:

AT *MF1 *DF1 *FL5<CR>

Description:

Configures DTE non return to zero interface.

Command

Function

*DF0

NRZ command and connect modes.

*DF1

NRZI command and connect modes.

PARITY

Type:

Configuration

Format:

AT [cmds] *RPn [cmds]

Example:

AT *RP0 *SM1<CR>

Description:

Sets the parity of the modem.

Command

Function

*RP0

Parity determined by V.25bis settings.

*RP1

Even parity.

*RP2

Odd parity.

*RP3

MARK parity.

*RP4

SPACE parity.

PROTOCOL

Type:

Configuration

Format:

AT [cmds] *LSn [cmds]

Example:

AT *LS1 <CR>

Description:

Selects the protocol for low-speed data calls.

Command

Function

*LS0

Bell protocols.

*LS1

ITU-T protocols.

PROTOCOL/SPEED

Type:

Configuration

Format:

AT [cmds] *MMn [cmds]

Example:

AT *MN6 *MX14 *MM11<CR>

Description:

Selects the current protocol.

Command

Function

*MM0

Selects V.32bis and below.

*MM1

Selects V.32 and below.

*MM2

Selects V.32bis and V.32.

*MM3

Selects V.32 only.

*MM4

Selects V.22bis only.

*MM5

Selects Bell 212 only.

*MM6

Selects Bell 103 only.

*MM7

Selects V.21 only.