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US ROBOTICS NETSERVER I-MODEM/8

3COM CORPORATION

US ROBOTICS NETSERVER I-MODEM/8

Card Type

Modem (asynchronous), ISDN

Chip Set

Unidentified

Maximum Modem Rate

33.6Kbps

Maximum Fax Rate

14.4Kbps

Data Modulation Protocol

Unidentified

Fax Modulation Protocol

Unidentified

Error Correction/Compression

Unidentified

Fax Class

Class I & II

Data Bus

External

CONNECTIONS

Function

Label

Function

Label

DC power

CN1

RJ-45 jack channel 5/6

CN7

RJ-45 jack channel 1/2

CN3

RJ-45 auxiliary connector

CN8

RJ-45 jack channel 3/4

CN4

RJ-45 console connector

CN9

BNC network connector

CN5

RJ-45 jack channel 7/8

CN10

RJ-45 network connector

CN6

Power switch

SW1

Note: CN3, CN4, CN7, CN10 jacks accept either RJ-11 or RJ-45 connectors.

 

 

 

 

 

 

 

 

 

 

USER CONFIGURABLE SETTINGS

Setting

Label

Position

Load defaults from NVRAM

SW1/1

Off

Load defaults from ROM

SW1/1

On

Command odd set recognition disabled

SW1/2

Off

Command odd set recognition enabled

SW1/2

On

Factory configured - do not alter

SW1/3

Unidentified

Factory configured - do not alter

SW1/4

Unidentified

Use software configured baud rate

SW2/3

Off

Force DIP switch rate

SW2/3

On

Normal flash memory operation

SW2/4

Off

Erase flash memory on boot-up

SW2/4

On

Factory configured - do not alter

SW2/5-10

Unidentified

CONSOLE PORT BAUD RATE

Rate

SW2/1

SW2/2

9600

Off

Off

19200

Off

On

38400

On

Off

57600

On

On

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

LED1

Off

Off

Power off

LED1

Green

On

Power on

LED1

Red

On

Critical failure

LED2

Off

Off

Channel 1 idle

LED2

Green

On

Channel 1 on-line

LED2

Green

Blinking

Channel 1 testing data link layer

LED2

Yellow

Blinking (8 times/sec.)

Channel 1 searching for U interface

LED2

Yellow

Blinking (1 times/sec.)

Channel 1 searching for S/T interface

LED2

Yellow

On

Channel 1 dialing

LED2

Red

On

Channel 1 U interface not found

LED2

Red

Blinking

Channel 1 incorrect SPID

LED3

Off

Off

Channel 2 idle

LED3

Green

On

Channel 2 on-line

LED3

Green

Blinking

Channel 2 testing data link layer

LED3

Yellow

Blinking (8 times/sec.)

Channel 2 searching for U interface

LED3

Yellow

Blinking (1 times/sec.)

Channel 2 searching for S/T interface

LED3

Yellow

On

Channel 2 dialing

LED3

Red

On

Channel 2 U interface not found

LED3

Red

Blinking

Channel 2 incorrect SPID

 

 

 

 

 

DIAGNOSTIC LED(S) (CONíT)

LED

Color

Status

Condition

LED4

Off

Off

Channel 3 idle

LED4

Green

On

Channel 3 on-line

LED4

Green

Blinking

Channel 3 testing data link layer

LED4

Yellow

Blinking (8 times/sec.)

Channel 3 searching for U interface

LED4

Yellow

Blinking (1 times/sec.)

Channel 3 searching for S/T interface

LED4

Yellow

On

Channel 3 dialing

LED4

Red

On

Channel 3 U interface not found

LED4

Red

Blinking

Channel 3 incorrect SPID

LED5

Off

Off

Channel 4 idle

LED5

Green

On

Channel 4 on-line

LED5

Green

Blinking

Channel 4 testing data link layer

LED5

Yellow

Blinking (8 times/sec.)

Channel 4 searching for U interface

LED5

Yellow

Blinking (1 times/sec.)

Channel 4 searching for S/T interface

LED5

Yellow

On

Channel 4 dialing

LED5

Red

On

Channel 4 U interface not found

LED5

Red

Blinking

Channel 4 incorrect SPID

LED6

Off

Off

Channel 5 idle

LED6

Green

On

Channel 5 on-line

LED6

Green

Blinking

Channel 5 testing data link layer

LED6

Yellow

Blinking (8 times/sec.)

Channel 5 searching for U interface

LED6

Yellow

Blinking (1 times/sec.)

Channel 5 searching for S/T interface

LED6

Yellow

On

Channel 5 dialing

LED6

Red

On

Channel 5 U interface not found

LED6

Red

Blinking

Channel 5 incorrect SPID

LED7

Off

Off

Channel 6 idle

LED7

Green

On

Channel 6 on-line

LED7

Green

Blinking

Channel 6 testing data link layer

LED7

Yellow

Blinking (8 times/sec.)

Channel 6 searching for U interface

LED7

Yellow

Blinking (1 times/sec.)

Channel 6 searching for S/T interface

LED7

Yellow

On

Channel 6 dialing

LED7

Red

On

Channel 6 U interface not found

LED7

Red

Blinking

Channel 6 incorrect SPID

LED8

Off

Off

Channel 7 idle

LED8

Green

On

Channel 7 on-line

LED8

Green

Blinking

Channel 7 testing data link layer

LED8

Yellow

Blinking (8 times/sec.)

Channel 7 searching for U interface

LED8

Yellow

Blinking (1 times/sec.)

Channel 7 searching for S/T interface

LED8

Yellow

On

Channel 7 dialing

LED8

Red

On

Channel 7 U interface not found

LED8

Red

Blinking

Channel 7 incorrect SPID

 

 

 

 

 

DIAGNOSTIC LED(S) (CONíT)

LED

Color

Status

Condition

LED9

Off

Off

Channel 8 idle

LED9

Green

On

Channel 8 on-line

LED9

Green

Blinking

Channel 8 testing data link layer

LED9

Yellow

Blinking (8 times/sec.)

Channel 8 searching for U interface

LED9

Yellow

Blinking (1 times/sec.)

Channel 8 searching for S/T interface

LED9

Yellow

On

Channel 8 dialing

LED9

Red

On

Channel 8 U interface not found

LED9

Red

Blinking

Channel 8 incorrect SPID

LED10

Red

On

POST test

LED10

Green

Blinking (1 times/sec.)

checking for software download

LED10

Green

Blinking (8 times/sec.)

loading NETserver application into RAM

LED10

Green

On

normal operation

LED11

Red

On

POST

LED11

Green

On

Erasing flash memory

LED11

Amber

On

Programming flash memmory

LED11

Off

Off

Normal

LED12

Red

On

Interface failure

LED12

Green

On

Transmitting packet

LED12

Off

Off

Idle

LED13

Red

On

Interface failure

LED13

Green

On

Receiving packet

LED13

Off

Off

Idle

LED14

Red

Blinking

Collision (1 blink per collision)

LED14

Green

On

10 base-T link detected

LED14

Off

Off

10 base-2 link connection (If 10 base-T is being used, this indicates a bad link)

LED15

Green

Blinking

Characters being received/transmitted through serial port

LED15

Off

Off

Serial port idle

SUPPORTED COMMAND SET

Basic AT Commands

AT, Ď+++í, A/

A, B, C, E, F, O, V

&C, &G, &W, &Z

S Registers

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

Note: See MHI Help File for full command documentation.

 

 

 

 

 

 

 

 

Proprietary AT Command Set

HELP

Type:

Configuration

Format:

AT [cmds] #$ [cmds]

Description:

Display the help pannels for the octothorpe (#) command set

ADDITIONAL RESULT CODES

Type:

Configuration

Format:

AT [cmds] &An [cmds]

Description:

Controls the display of the additional result codes

Command

Function

í &A0

Do not display ARQ result codes

&A1

Display ARQ result codes

&A2

Display ARQ result codes, HST, V.32, V.FC or V.34 modulation indicator

&A3

Display ARQ result codes and error control indicator LAPM, HST, MNP, SYNC, or NONE

BREAK HANDLING

Type:

Configuration

Format:

AT [cmds] &Yn [cmds]

Description:

Controls the break handling

Command

Function

í &Y0

Destructive, donít send break

&Y1

Destructive, expedited break sent

&Y2

Nondestructive, expedited break sent

&Y3

Nondestructive un-expedited break sent

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CONNECTION RATE

Type:

Configuration

Format:

AT [cmds] &Nn [cmds]

Description:

Controls the connection rate

Command

Function

í &N0

Variable rate

&N1

300bps

&N2

1200bps

&N3

2400bps

&N4

4800bps

&N5

7200bps

&N6

9600bps

&N7

12Kbps

&N8

14.4Kbps

&N9

16.8Kbps

&N10

19.2Kbps

&N11

21.6Kbps

&N12

24Kbps

&N13

26.4Kbps

&N14

28.8Kbps

&N15

31.2Kbps

&N16

33.6Kbps

DATA COMPRESSION

Type:

Configuration

Format:

AT [cmds] &Kn [cmds]

Description:

Controls the data compression

Command

Function

&K0

Data compression disabled

í &K1

Use auto enable/disable data compression

&K2

Data compression always enabled

&K3

Selective data compression

DATA SET READY (DSR)

Type:

Configuration

Format:

AT [cmds] &Sn [cmds]

Description:

Selects DSR options

Command

Function

&S0

DSR forced high

í &S1

DSR high only while modem is handshaking or connected

&S2

DSR and CTS follows CD when carrier is lost

&S3

DSR follows CD when carrier is lost

&S4

Send the computer a DSR signal at the same time as the CD

&S5

Send DSR normally, and follow CTS with CD

 

 

 

DATA TERMINAL READY (DTR)

Type:

Configuration

Format:

AT [cmds] &Dn [cmds]

Description:

Selects modem response to DTR

Note: The action each variant of &D causes depends on the setting of &Q

Command

Function

í &D0

Modem does not respond to DTR

&D1

Modem goes to command mode after DTR goes is off

&D2

Modem goes to command mode and disconnects (hangs up) after DTR goes off; Auto-Answer is disabled.

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

DL

Re-dial last number

DP

Pulse dialing enabled

DR

Reverse frequencies.

DS=n

Dial stored telephone number n

DT

Tone dialing enabled/Pulse dialing disabled

DW

Dialing resumed following dial tone detection

D,

Dialing paused for amount of time specified in S8 register

D"WXY"

Optional method of denoting telephone numbers. Letters enclosed in quotes are interpreted as numbers according to the system found on a telephone keypad.

D@

Wait for Quite 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.

D$

Wait for prompt tone detection function enabled. Waits for prompt tone for amount of time specified by the S7 command.

D;

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

D"

Dial the letters that follow

D/

Pause for 125 milliseconds

ERROR CONTROL

Type:

Configuration

Format:

AT [cmds] &Mn [cmds]

Description:

Selects the error control protocol

Command

Mode

í &M0

Normal mode, no error control

&M1

Online synchronous mode

&M4

Normal/ARQ mode,

&M5

ARQ asynchronous mode

&M6

V.25bis synchronous mode.

&M7

V.25bis synchronous mode using HDLC link protocol

FACTORY DEFAULT PROFILE

Type:

Configuration

Format:

AT [cmds] &F [cmds]

Description:

Sets values in active profile to values found in the default profile

Command

Function

í &F0

Load No Flow Control template settings

&F1

Load Hardware Flow Control template settings

&F2

Load Software Flow Control template settings

HARDWARE RESET

Type:

Immediate

Format:

AT [cmds] Z! [cmds]

Description:

If SW1/1 is on, then revert to the settings in NVRAM. If SW1/1 is off, reset to the &F0 configuration template

HELP

Type:

Immediate

Format:

AT [cmds] $

Description:

Display help screens for the AT basic command set

Command

Function

&$

Display help screens for the & command set

*$

Display help screens for the * command set

HOOK CONTROL

Type:

Immediate

Format:

AT [cmds] Hn [cmds]

Description:

Selects whether the modem is on-hook or off-hook

Command

Function

í H0

Modem commanded to go on-hook (hang-up)

LINE TYPE

Type:

Configuration

Format:

AT [cmds] &Ln [cmds]

Description:

Selects line type

Command

Line Type

í &L0

Switched line (PSTN/Dial-up)

MODEM CLOCK

Type:

Configuration

Format:

AT [cmds] Kn [cmds]

Description:

Controls the modem clock

Command

Function

í K0

If on-line, display current call duration; if off-line, display the last callís duration

K1

Display the actual time (set clock using ATI3=HH:MM:SS K1)

RECEIVE DATA FLOW CONTROL

Type:

Configuration

Format:

AT [cmds] &In [cmds]

Description:

Controls the receive data flow control

Command

Jack Type

í &I0

Disables XON/XOFF flow control

&I1

Modem acts on typed XON/XOFF commands, Ctrl -S, or Ctrl -Q and passes them to remote device

&I2

Modem acts on typed XON/XOFF commands but removes them from data stream

&I3

Hewlett Packard host mode

&I4

Hewlett Packard terminal mode

&I5

Enable flow control on the phone link when the connection is not under error control

REPEAT LAST ISSUED COMMAND

Type:

Immediate

Format:

A>

Description:

Repeats last issued command until any key is pressed

Note: Do not precede this command with AT, or follow it with <CR>.

REPORT INFORMATION

Type:

Immediate

Format:

AT [cmds] In [cmds]

Description:

Displays information requested

Command

Function

I0

Reports 4 digit product code

I1

Reports results of ROM checksum

I2

Reports results of RAM test

I3

Reports the product name

I4

Reports the current modem settings

I5

Reports the settings stored in NVRAM

I6

Reports statistics for the last call

I7

Reports product configuration

I10

Reports dial security account status information

I11

Displays high speed connection report

I12

Reports ISDN settings

RESULT CODES

Type:

Configuration

Format:

AT [cmds] Qn [cmds]

Description:

Enables modem to send result codes to the DTE

Command

Function

í Q0

Result code sending enabled

Q1

Result code sending disabled

Q2

Suppress result codes when answering

RTS/CTS

Type:

Configuration

Format:

AT [cmds] &Rn [cmds]

Description:

Selects RTS/CTS options

Command

Function

í &R0

CTS follows RTS in data mode; RTS is ignored in command mode.

&R1

CTS forced high, RTS is ignored.

&R2

Enable hardware flow control of received data

SELECT CALL PROGRESS RESULT CODES

Type:

Configuration

Format:

AT [cmds] Xn [cmds]

Description:

Enables selection of tone detection and associated result code format options

Command

Function

X0

Busy and dial tone detection disabled; result codes 0 - 4 enabled.

X1

Busy and dial tone detection disabled; result codes 0 - 5 & 10 enabled.

X2

Busy tone detection disabled, dial tone detection enabled; result codes 0 - 6 & 10 enabled.

X3

Busy tone detection enabled, dial tone detection disabled; result codes 0 - 5, 7 & 10 enabled.

Í X4

Busy and dial tone detection enabled; result codes 0 - 7 & 10 enabled.

X5

Busy tone detection enabled, dial tone detection disabled, all result codes enabled

X6

All result codes enabled

X7

Voice detection disabled, all result codes enabled

SERIAL PORT RATE

Type:

Configuration

Format:

AT [cmds] &Bn [cmds]

Description:

Controls the serial port rate

Command

Function

í &B0

Variable serial port rate

&B1

Fixed serial port rate

&B2

In answer mode use fixed rate for ARQ calls and variable rate for non ARQ calls.

SOFTWARE RESET

Type:

Immediate

Format:

AT [cmds] Z [cmds]

Description:

If SW1/1 is set to on, revert to the settings in NVRAM. If SW1/1 is set to off, reset to the &F0 configuration template

TEST MODES

Type:

Immediate

Format:

AT [cmds] &Tn

Description:

Selects test options

Command

Function

&T0

End current test

&T3

Begin local digital loopback

&T4

Grant remote digital loopback request

&T5

Deny remote digital loopback request

&T6

Request remote digital loopback

&T7

Request remote digital loopback and self-test

TRANSMIT DATA FLOW CONTROL

Type:

Configuration

Format:

AT [cmds] &Hn [cmds]

Description:

Controls the transmit data flow

Command

Function

í &H0

Flow control disabled

&H1

Use hardware flow control enabled

&H2

Use software flow control enabled

&H3

Use both hardware and software flow control enabled

Extended AT Commands

ASSIGN PASSWORD

Type:

Immediate

Format:

AT [cmds] %V=PWn [cmds]

Description:

Assign the password in account n in security account

CALL TYPE

Type:

Configuration

Format:

AT [cmds] *Vn [cmds]

Description:

Set the call type for each B-channel

Command

Function

í *V0

0-5 for B-channel 1

*V1

0-5 for B-channel 2

DIRECTORY NUMBER

Type:

Configuration

Format:

AT [cmds] *Pn [cmds]

Description:

Set the directory number that was assigned to you by your telephone company

Command

Function

í *P1

The DN for B-channel 1

*P2

The DN for B-channel 2

ERASE SECURITY SETTINGS

Type:

Configuration

Format:

AT [cmds] %En [cmds]

Description:

Erases selected security settings

Command

Function

%E1

Erase local access password

%E2

Erase autopass password

%E3

Erase passwords in accounts 0-9

%E4

Erase phone numbers in accounts 0-9

%E5

Disable account, dialback, and new number fields in accouns 0-9

LOCAL ACCESS PASSWORD

Type:

Configuration

Format:

AT [cmds] %Ln [cmds]

Description:

Set local access password

PASSWORD SECURITY

Type:

Immediate

Format:

AT [cmds] %P [cmds]

Description:

Disable password security

POINT TO POINT SELECTION

Type:

Configuration

Format:

AT [cmds] *Mn [cmds]

Description:

Select point to point or multipoint

Command

Function

í *M0

Point to point

*M1

Multipoint

REMOTE CONFIGURATION

Type:

Configuration

Format:

AT [cmds] %Cn [cmds]

Description:

Controls the remote configuration

Command

Function

%C0

Defer configuration changes until the call is ended

%C1

Cancel configuration changes and restore the original configuration

%C2

Force configuration changes to take effect immediately

REMOTE CONFIGURATION

Type:

Configuration

Format:

AT [cmds] %Fn [cmds]

Description:

Configure another deviceís data remotely

Command

Function

%F0

No parity, 8 data bits

%F1

Mark parity, 7 data bits

%F2

Odd parity, 7 data bits

%F3

Even parity, 7 data bits

SECURITY ACCOUNTS

Type:

Configuration

Format:

AT [cmds] %An [cmds]

Description:

Create and configure security accounts

SECURITY ACCOUNTS

Type:

Configuration

Format:

AT [cmds] %Sn [cmds]

Description:

Access security accounts

SERIAL PORT RATE

Type:

Configuration

Format:

AT [cmds] %Bn [cmds]

Description:

Remotely configure a modemís serial port rate

Command

Function

%B0

110bps

%B1

300bps

%B2

600bps

%B3

1200bps

%B4

2400bps

%B5

4800bps

%B6

9600bps

%B7

19200bps

%B8

38400bps

%B9

57600bps

%B10

115200bps

SERVICE PROFILE ID

Type:

Configuration

Format:

AT [cmds] *Sn [cmds]

Description:

Set the service profile ID

Command

Function

í *S1

the SPID for B-channel 1

*S2

The SPID for B-channel 2

SWITCH PROTOCOL

Type:

Configuration

Format:

AT [cmds] *Wn [cmds]

Description:

Set the switch protocol used at the telephone companyís central office

Command

Jack Type

í *W0

AT&T 5ESS Custom

*W1

Northern Telecom DMS-100

*W2

National ISDN-1

*W3

National ISDN-2

TERMINAL ENDPOINT ID

Type:

Configuration

Format:

AT [cmds] *T [cmds]

Description:

Sets the terminal endpoint (TEI)

Command

Function

í *T1

0-63 for B-channel 1

*T2

0-63 for B-channel 2

TONE FREQUENCIES

Type:

Configuration

Format:

AT [cmds] %Tn [cmds]

Description:

Enalbes recognition of the tone frequencies

S(status) -REGISTERS

BIT MAPPED REGISTER

Type:

Register

Format:

AT [cmds] S15=n [cmds]

Unit:

Bit-mapped

Description:

Controls fallback

Bit

Value

Function

0

1

Disable the modemís extra high frequency equalization if it causes problems on shorter -link calls- for HST modulation only

1

2

Disable online fallback

2

4

Disable 450bps back channel ---HST only

3

8

Reset non-ARQ mode transmit buffer from 1.5Kbytes to 128

4

16

Disable MNP level 4

5

32

Set backspace key to delete

6

64

Alternate MNP setting for some 2400bps MNP modems not made by U.S. Robotics of Microcom.

7

128

Custom applications only

BIT MAPPED REGISTER S16

Type:

Register

Format:

AT [cmds] S16=n [cmds]

Unit:

Bit-mapped

Description:

Controls loopback tests and test pattern

Bit

Value

Function

2

4

Test pattern

3

8

Remote digital loopback

BIT MAPPED REGISTER S53

Type:

Register

Format:

AT [cmds] S53=n [cmds]

Description:

Bit mapped register

Bit

Value

Function

0

1

Dial security enabled

1

2

Prompting enabled

2

4

Local access password protection enabled

BIT MAPPED REGISTER S54

Type:

Register

Format:

AT [cmds] S54=n [cmds]

Description:

Bit mapped register

Bit

Value

Function

0

1

Disable 2400 symbol rate

1

2

Disable 2743 symbol rate

2

4

Disable 2800 symbol rate

3

8

Disable 3000 symbol rate

4

16

Disable 3200 symbol rate

5

32

Disable 3429 symbol rate

6

64

Disable Call Indicate

7

128

Disable V.8

BIT-MAPPED REGISTER S13

Format:

AT [cmds] S13=n [cmds]

Default:

170

Range:

0-174

Unit:

Bit-mapped

Description:

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

Bit

Value

Function

0

1

Reset when DTR drops

1

2

Reverse normal auto answer mode

2

4

Disable 250 msec pause before result code display

3

8

On DTR signal, Autodial the number stored in NVRAM at position 0

4

16

At power on/reset, auto dial number stored in NVRAM at position 0

5

32

Disable HST

6

64

Disable MNP level 3

7

128

Hardware reset

BIT-MAPPED REGISTER S14

Format:

AT [cmds] S14=n [cmds]

Default:

170

Range:

0-174

Unit:

Bit-mapped

Description:

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

Bit

Value

Function

0

í 1

Disconnect on escape code

1

2

Send result codes only when originating a call

BIT-MAPPED REGISTER S28

Format

AT [cmds] S28=n [cmds]

Default:

Unidentified

Range:

8

Unit:

.1 second

Description:

Sets the duration of the extra 3000/600 Hz answer tones sent during handshaking.

BITMAPPED REGISTER S27

Format

AT [cmds] S27=n [cmds]

Default:

Unidentified

Range:

0

Unit:

Bit-mapped

Description:

Selects modulation

Bit

Value

Function

0

1

Enable ITU-T V.21

1

2

Enable unencoded modulation in V.32 mode

2

4

Disable V.32 modulation

3

8

Disabl;e 2100Hz answer tone

4

0

16

0

16

Complete handshaking sequence:V.42 detection, LAPM error control, MNP

Disable MNP

Disable V.42 detection and LAPM

Disable detection phase

5

0

0

32

32

Complete handshaking sequence:V.42 detection, LAPM error control, MNP

Disable MNP

Disable V.42 detection and LAPM

Disable detection phase

7

128

Unusual software incompatibility

BITMAPPED REGISTER S29

Type:

Register

Format

AT [cmds] S29=n [cmds]

Default:

20

Range:

Unidentified

Unit:

.1 sec

Description:

Sets the duration of the V.21 answer tone

BIT-MAPPED REGISTER S34

Type:

Register

Format:

AT [cmds] S34n [cmds]

Default:

0

Range:

Unidentified

Unit:

Unidentified

Description:

Controls V.32bis

Bit

Value

Function

0

1

Disable V.32bis

1

2

Disable modemís enhanced proprietary V.32bis modulation

2

4

Disable the faster retrains that occure during proprietary V.32terbo modulation

3

8

Enable V.23

4

16

Force the MR LED to show DSR

5

32

Enable MI/MIC

6

64

Disable the remote access busy message

7

128

Disable V.32terbo

BIT-MAPPED REGISTER S51

Format

AT [cmds] S51=n [cmds]

Default:

0

Range:

Unidentified

Unit:

Bit-mapped

Description:

MNP/V.42 control

Bit

Value

Function

0

1

Disable MNP/V.42 for V.22

1

2

Disable MNP/V.42 for V.22bis

2

4

Disable MNP/V.42 for V.32/V.32bis/V.32terbo

6

64

Disable selective reject

7

128

Enable handset exclusion delay

BIT-MAPPED REGISTER S55

Type:

Register

Format

AT [cmds] S55=n [cmds]

Description:

Bit-mapped register

Bit

Value

Function

0

1

Disable 8S-2D mapping

1

2

Disable 16S-4D mapping

2

4

Disable 32S-2D mapping

3

8

Disable 64S-4D mapping

7

128

Enable phase roll detection

BIT-MAPPED REGISTER S56

Type:

Register

Format

AT [cmds] S56 [cmds]

Description:

Bit-mapped register

Bit

Value

Function

0

1

Disable non-linear coding

1

2

Disable TX level deviation

2

4

Disable pre-emphasis

3

8

Disable precoding

4

16

Disable shaping

5

32

Disable 31.2 and 33.6 speeds in V.34

6

64

Disable V.34

7

128

Disable V.FC

BIT-MAPPED REGISTER S69

Type:

Register

Format:

AT [cmds] S69=n [cmds]

Description:

Bit-mapped register

Bit

Value

Function

0

1

Disable plug and play signaling

1

2

Enable carrier loss redial

BIT-MAPPED REGISTER S70

Type

Register or Configuration

Format

AT [cmds] S70=n [cmds]

Description

Bit-mapped register

Bit

Value

Function

0

1

Enable recognition of Ring A

1

2

Enable recognition of Ring B

2

4

Enable recognition of Ring C

3

8

Enable recognition of Ring D

BREAK LENGTH

Format

AT [cmds] S21=n [cmds]

Default:

Unidentified

Range:

Unidentified

Unit:

10msec

Description:

Sets the duration of breaks sent from the modem to the computer or terminal

DSR RECOGNITION

Type:

Register

Format

AT [cmds] S25=n [cmds]

Default:

5

Range:

Unidentified

Unit:

.1 second

Description:

Sets DTR recognition time

DSR SIGNAL

Type:

Register

Format

AT [cmds] S24=n [cmds]

Default:

150

Range:

Unidentified

Unit:

.02 sec

Description:

Sets the duration between pulsed DSR signals when the modem is set to &S2 or &S3.

FLOW CONTROL CHARACTER - XOFF

Format

AT [cmds] S23=n [cmds]

Default:

19

Range:

Unidentified

Description:

Stores the ASCII code for the XOFF character

GUARD TIME DURATION

Type:

Register

Format

AT [cmds] S43=n [cmds]

Default:

200

Unit:

.02 sec

Description:

Sets the duration of the guard time for the remote access sequence

INACTIVITY TIMER

Type:

Register

Format

AT [cmds] S19=n [cmds]

Default:

Unidentified

Range:

Unidentified

Unit:

Minute

Description:

Sets the duration in minutes for the inactivity timer, S19=0 disables the timer

REESTABLISHING CONNECTION INTERVAL

Format

AT [cmds] S44=n [cmds]

Default:

15

Description:

Sets the duration of the interval between losing carrier and reestablishing a connection

REMOTE ACCESS

Type:

Register

Format

AT [cmds] S41=n [cmds]

Description:

Sets the number of allowable remote access login attempts, thus enabling or disabling remote access.

REMOTE ACCESS ESCAPE CHARACTER

Type:

Register

Format

AT [cmds] S42=n [cmds]

Default:

126

Range:

Unidentified

Unit:

Unidentified

Description:

Stores the ASCII decimal code for the remote access escape character.

TRANSMIT BUFFER

Type:

Register

Format

AT [cmds] S38n [cmds]

Description:

Sets the time before a forced hang up and clearing of the transmit buffer when DTR drops during an ARQ call.

VOICE/DATA SWITCH

Type:

Register

Format

AT [cmds] S32=n [cmds]

Default:

9

Range:

Unidentified

Unit:

Unidentified

Description:

Assign voice/data switch function

Value

Function

0

Disabled

1

Voice/data - originate mode

2

Voice/data - answer mode

3

Radial last number

4

Dial number stored at position 0

5

Auto answer on/off toggle

6

Reset modem

7

Initiate remote digital loopback

8

Busy out the phone line toggle

9

Execute stored command

XON CHARACTER

Format

AT [cmds] S22=n [cmds]

Default:

17

Range:

Unidentified

Unit:

Bit-mapped

Description:

Stores the ASCII code for XON character