Devolo MicroLlink User Manual

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MicroLink® ISDN i

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While the information in this manual has been compiled with great care, it may not be deemed an assurance of product characteristics. devolo shall be liable only to the degree specified in the terms of sale and delivery.

The reproduction and distribution of the documentation and software supplied with this product and the use of its contents is subject to written authorization from devolo. We reserve the right to make any alterations that arise as the result of technical development.

Trademarks

Windows

MicroLink

, Windows NT® and Microsoft® are registered trademarks of Microsoft, Corp.

is a registered trademark of devolo AG.

The devolo logo is a registered trademark of devolo AG. All other names mentioned may be trademarks or registered trademarks of their respective owners.

Subject to change without notice. No liability for technical errors or omissions.

devolo AG

Sonnenweg 11

52070 Aachen

Germany

www.devolo.com

Aachen, January 2005

40158/0105

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Preface

Thank you for placing your trust in this devolo product.

With the MicroLink ISDN i you have chosen a modem which will permit you to take advantage of the ISDN technology.

Exacting manufacturing standards and stringent quality control are the basis for high product standards and consistent quality to ensure your fullest satis faction with this modem.

About this manual

This manual will inform you about all aspects of your MicroLink ISDN i. In addition, a brief overview and a detailed description of the AT commands are provided.

This documentation was compiled by several members of our staff from a variety of departments in order to ensure you the best possible support when using your devolo product.

Additional information in the Internet at 'www.devolo.com'.

Our online services www.devolo.com are available to you around the clock should you have any queries regarding the MicroLink ISDN i.

Package Contents

Please ensure that the delivery is complete before beginning with the installation of your MicroLink ISDN i:

쎲 MicroLink ISDN i 쎲 Power adapter 쎲 ISDN S0 connector cable 쎲 Serial connector cable (Mini-DIN8) to 9-pin subminiature socket 쎲 9pin/25pin adapter 쎲 CD including drivers and manual 쎲 Manual (in print)

devolo reserves the right to change the package contents without prior notice.

devolo MicroLink ISDN i

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CE conformity

This product meets the requirements of the 1999/5/EG Directive (R&TTE) and is designed for connection to public telecommunications networks in the EU and Switzerland.

Connect the device to the public telecommunications network with the supplied cable.

The declaration of conformity with the basic requirements can be found in the appendix of this manual.

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Contents

1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.1 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.2 Highlights of the MicroLink ISDN i . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2 Control commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.1 Entering and executing AT commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.1.1 Escape command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.2 Bit-oriented registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.2.1 Modifying bit-oriented registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.3 Overview of AT commands and registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.3.1 Basic controlling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.3.2 Additional controlling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.4 Overview of the AT command set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3 AT commands: Detailed description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.1 Description of registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

3.2 Description of messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

3.2.1 Commands with effect on messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

3.3 Caller ID of remote station . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

3.3.1 V.24 interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

3.3.2 The interface lines have the following significance: . . . . . . . . . . . . . . . . . . . 54

3.4 Error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

4 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

4.1 Status display and troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

4.1.1 Status display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

4.2 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

4.3 Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

4.4 Warranty conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

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Introduction

1 Introduction

The MicroLink ISDN i is an external desktop model housed in a robust flat aluminum case. The hardware installation is fast and user-friendly thanks to plug&play support.

The manufactured modem MicroLink ISDN i is delivered as integrated subcomponents of an entire system. If the system should not yet be installed, please establish the following connections.

1.1 Installation

햲 Connection of the modem to the power supply

햳 Connection of the modem to the serial interface of the computer

햴 Connection of the modem to an ISDN telephone socket

햵 Please insert the supplied devolo product CD into your CD-ROM drive.

햶 To install the driver, please follow the instructions of the hardware wiz-

ard.

The MicroLink ISDN i driver contains information (e. g. device name, connecting messages, initialization commands) for your Windows operating system. It could also be found in the download area of our homepage www.devolo.com. In case you need more information, please refer to the sys tem documentation.

1.2 Highlights of the MicroLink ISDN i

The following is an outline of the essential technical features of the MicroLink ISDN i to provide a quick overview of its performance:

쎲 Transfer rates—MicroLink ISDN i supports the following transfer rates

and velocities:

쑗 X.75 mit 56,000 bps, 64,000 bps 쑗 V.120 mit 56,000 bps, 64,000 bps 쑗 X.75/T.70NL mit 56,000 bps; 64,000 bps; 쑗 X.75-T-Online (VT-100, CEPT, KIT)

쎲 Automatic protocol detection—Depending on its configuration, the

ISDN modem supports automatic detection of the X.75, V.120 and HDLCPPP protocols for incoming and outgoing connections.

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Introduction

쎲 D-channel protocol—You can choose between the DSS1 protocol

(Euro ISDN) and the 1TR6 protocol (German national ISDN). The DSS1 protocol is the default selection.

쎲 Terminal selection digits and MSN—The ISDN modem supports the

setting and querying of terminal selection digits.

쎲 Delayed call answering—This function permits the delayed answer-

ing of incoming calls. This can be useful if several ISDN modems with the same terminal selection digit or MSN (multiple subscriber number) are connected to one ISDN S

쎲 Status displays—LED displays at the front of the ISDN modem permit

the monitoring of the ISDN connection and the line to facilitate trouble shooting of possible system faults.

쎲 Error correction—The V.120 and X.75 error correction protocols

implemented in the modems guarantee a 100% error-free data transmission even with poor telephone connections. MicroLink ISDN i with V.120 and X.75, reliable, error-free connections can be established with other similarly equipped modems.

interface.

쎲 Flash ROM technology—With the help of flash ROM technology,

firmware updates can be implemented quickly and easily.

쎲 Warranty—three years warranty for the MicroLink ISDN i 쎲 Protected—The MicroLink ISDN i satisfies the CE requirements.

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Control commands

2 Control commands

The so-called AT command set established itself as the worldwide standard for modem control command syntax (AT = command prefix Attention). The MicroLink ISDN i also operates with the AT command set, permitting users of data communications equipment to continue using a familiar command set for ISDN communications. A terminal program is required to enter AT com mands via a PC.

The complete AT command set can be found in the chapter 'AT commands: Detailed description'.

2.1 Entering and executing AT commands

After switching on, the ISDN modem is in the command phase. Commands can only be accepted, interpreted and executed in this phase.

In the event that several commands are to be sent to the ISDN modem, these may be entered individually, each with an AT command prefix and a conclud ing M. It is also possible, however, to enter these commands consecutively in a single command line after an introductory AT and to conclude the line with an

The individual commands may be separated by spaces to improve the overview. No further characters may be entered once the end of the command line buffer has been reached. The command line can then only be edited with R (backspace) or executed with M.

2.1.1 Escape command

The characters S-x and S-c may be used to abort the execution of a command line or a screen display (e.g. when returning the contents of the registers with AT%R).

Commands that must be specified with a parameter may also be entered without a parameter. The absence of a parameter corresponds to the param eter 0 (e.g. ATI = ATI0).

After the successful establishment of a connection to the remote station, the ISDN modem switches from the command phase to the transfer phase.

Transfer phase means that a connection to a remote data station (i.e. to another ISDN modem) exists: the ISDN modem is online. This is the case after successful call establishment (outgoing call), as well as after answering

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Control commands

a call (incoming call). The exchange of data between two data stations can take place during this phase.

A renewed transition to the command phase and back, also in the case of an existing connection, is possible with the escape command and the command ATO. The escape command consists of a series of three escape characters (default setting: +++) and a valid command line.

After the three escape characters have been entered, the ISDN modem is already in the command phase. Data transfer is not interrupted until a valid command line has been recognized.

The escape character has nothing in common with the character E of the ASCII character set. It can be redefined in register S2.

All commands sent to the ISDN modem must begin with the ASCII characters AT or at (not valid: At or aT) and must be concluded with mand line in an escape sequence is restricted to a maximum of 40 characters.

M. A valid com-

The command AT&F loads the firmware default parameter settings. The ISDN modem is thus reset to its factory defaults. This command is not exe cuted during existing connections.

2.2 Bit-oriented registers

Bit-oriented registers are primarily used to provide status information. Please note that the modification of a single value in the bit-oriented register may have several functions. Great caution should thus be applied when changing bit-oriented registers! We recommend the use of the AT commands to change the configuration of the ISDN modem. A complete description of the S registers can be found in the chapter tion'.

2.2.1 Modifying bit-oriented registers

The following example will illustrate the modification of the bit-oriented options of a register. To set the bit 6 of register S14, enter the command ATS14.6=1.

'AT commands: Detailed descrip-

If you would like this value to be maintained after the ISDN modem is switched off, the new entry can be stored with the command AT*W.

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Control commands

2.3 Overview of AT commands and registers

The following structured short overview will provide you with frequently used AT commands and registers to change the configuration of your modem. The column “Commands and registers“ lists AT commands and registers to change the basic settings of the modem. In addition, you will find AT com mands and registers in the column “Additional commands and registers“ to affect the performance of the modem.

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2.3.1 Basic controlling

Control commands

Configuration Commands and register

Basic modem initialisation AT&F

Control of connection establishment (dial-up)

Answering of incoming call, line acceptance, hang up

Switch between command and transmission phase

Control of call signaling ATL, ATM

Selection of modem information

Control of error correction AT+ES

Control of dial lock or dial delay

ATD, ATP, ATT, ATX AT$D, AT:D, S6, S7, S8, S14

ATA, ATD, ATH, AT&D2, S0 AT-H, AT\T, S14.6, S28 (Bit

+++, ATO S2

ATI, ATS, AT&V AT%R, AT\S, AT%V, S86

S31 (Bit 7)

Additional commands

and register

(Bit 6)

2.3.2 Additional controlling

Configuration Commands and registers

Working with stored initialisations

Special controlling

Control of modem signaling lines

Control of DTR effect AT&D AT$D, AT:D, S28 (Bit 7)

Control of modem answers ATE, ATQ, ATV, AT\V AT&D, AT-H, AT-M, AT*Q,

Control of dial tones AT&G

Control of data format S28 (Bit 0-1), S53

AT&V, AT&W, AT*W, AT&Y, ATZ

AT&C AT\D, AT&S

Additional commands and registers

S96

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Control commands

2.4 Overview of the AT command set

Command Meaning

A Answering an incoming call

&C0 &C1

Dn Establishing a connection

$D0 $D1

&D0 &D1 &D2 &D3

\D0 \D1 \D2 \D3

E0 E1

&F Load default configuration

\F Dialing of stored telephone numbers

H Hang up

DCD is always active DCD indicates an existing connection

Disables DTR dialing Enables DTR dialing

Ignore transition of DTR status Switch to command phase if DTR -> OFF Abort connection if DTR -> OFF Abort connection and reinitialize if DTR -> OFF

DSR and CTS always active DSR tracks transmission channel and CTS always active DSR always active and CTS tracks DCD DSR tracks transmission channel and CTS tracks DCD

Commands not echoed

Commands echoed

H2 Call rejected

I0 I1 I2 I3 I4 I5 I6 I7 I9

$I? Display of current ISDN parameters

$IBP B-channel protocol setting

$IBR Setting the ISDN bit rate

$ICI? Display charge information

$ICI Delete charge information

devolo MicroLink ISDN i

Report product code in nnn format Report checksum Report checksum result Report version number and firmware release date Display of current parameters Report serial number and hardware release Display product name Report self-test result Report plug&play ID text

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Command Meaning

Control commands

$ICLI Setting the outgoing multiple subscriber number (MSN)

$ICLI Suppression of caller ID display

$IDBS Setting the data block length

$IDP D-channel protocol setting

$IEAZ Setting the terminal selection digit (EAZ)

$IMSN Call acceptance from multiple subscriber numbers (MSNs)

$IRES Reset ISDN settings

$ISCI Service characteristics for incoming analog calls

$ISCO Service characteristics for outgoing analog calls

-M0

-M1

O Transition to online status

\Pmn Storing dial numbers (m = 0 to 9)

Q0 Q1 Q2

Plain text CONNECT messages dependent on AT\V Plain text CONNECT messages independent of AT\V

Return of messages from ISDN terminal adapter on Return of messages from ISDN terminal adapter off Messages off in answer mode

*Q0 *Q1

\Q0 \Q1 \Q2 \Q3 \Q4

Sn=x Sn? Sn ? =x

\S Display of the current settings

\Tn Inactivity timer

$UPX Firmware upload in flash ROM

V0 V1

%V Display of firmware version

CONNECT message after invalid escape sequence No CONNECT message after invalid escape sequence

No handshake Bidirectional XON/XOFF handshake Unidirectional CTS handshake Bidirectional RTS/CTS handshake Unidirectional XON/XOFF handshake

Sets register n to value x Reads the value of register n Sets pointer to register n Reads value of last register used Sets value of last register used to x

Messages in short form as a digit Messages in plain text

&V Display configuration profiles

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Control commands

Command Meaning

\V0 \V1 \V2 \V8

&W Save configuration profile

*W Save complete configuration profile

X0 X1 X2 X3 X4

\X0 \X1

&Y Set pointer to configuration profile

Zn Load configuration profile

&Z Store dial number

AT.m =x AT.m ? ATSn.m=x

No modified CONNECT messages Identification of connections with error correction Additional distinction of correction processes Detailed CONNECT messages

Busy signal returns NO CARRIER Busy signal returns NO CARRIER Busy signal returns NO CARRIER Busy signal returns BUSY Busy signal returns BUSY

XON/XOFF characters are not sent XON/XOFF characters are sent

Sets the bit m to the value x (m = 0 to 7; x = 0 to 1) Reads the value of bit m Sets bit m in S register n to value x (m = 0 to 7; x = 0 to 1)

=? Query of the value range of a command

The complete AT command set can be found in the next chapter 'AT commands: Detailed description'.

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AT commands: Detailed description

3 AT commands: Detailed description

Labeling of the Default Configuration

The *character marks the default AT command settings. The standard values of the individual register bits are marked in bold type.

A Answer Incoming call

ATA

Incoming calls can be answered using this command. If acknowledgments by the modem are not suppressed, the result code RING (plain text) or 2 (short form) is displayed for an incoming call. (See register S154/S155 and register S160 for further information regarding call establishment).

Calls cannot be answered manually if automatic call answering has been set, as the call establishment will be aborted by the entry of any character other than a line feed (see register S0). Call establishment is not aborted, however, if bit 6 of register S14 has been set to 1 (default = 0). This setting permits the attached computer to send characters to the MicroLink ISDN i during call establishment.

Please also observe the register S152 (“call display delay”) with regard to this command. No further commands can be executed from the same command line after this command.

&C Significance of DCD

AT&C0 : DCD is always active

*AT&C1 : DCD indicates an existing connection

Communications programs normally evaluate the line DCD to verify the presence of a connection. The MicroLink ISDN i supports this evaluation with the setting AT&C1.

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AT commands: Detailed description

D Establishing a connection

ATDn

When this command is issued, the MicroLink ISDN i attempts to establish a connection and dials the telephone number n. n may consist of the numerals 0 to 9, * and #. The maximum length for the complete dialing string is 36 characters, not including ATD. The following special characters may be inserted; all other characters will be ignored:

Special characters Description

* or # External call

Dialing of stored telephone numbers L Sm S=m or /m

; Remain in command mode after dial string (for the addition of

S Establishment of a semi-permanent connection (SPC) with a fol-

Redial

Dial the number stored with AT&Z at location m

Dial the number stored with AT\P at location m

further dialing commands in the event of excessively long dial

strings))

lowing 'S'

Defining ports and outgoing multiple subscriber numbers (Px) (M+) (M-) (Mnr)

Defining port 0 (V.24 interface)

Outgoing MSN displayed

Outgoing MSN not displayed

Define calling number specified in nr as outgoing MSN

The call establishment can be aborted at any time during the dialing process by entering any character other than line feed, XON or XOFF.

$D Automatic dialing with DTR

*AT$D0 : Disables DTR dialing

AT$D1 : Enables DTR dialing

When DTR dialing is enabled and the condition of the control line switches from OFF to ON, the MicroLink ISDN i establishes a connection to the number

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stored in the first location (see AT\P or AT&Z commands). If no number has been stored, the MicroLink ISDN i returns ERROR.

&D Effect of DTR

AT&D0 : Ignore transition of DTR status

AT&D1 : Switch to command phase if DTR -> OFF

*AT&D2 : Abort connection if DTR -> OFF

AT&D3 : Abort connection and reinitialize

if DTR -> OFF

These commands are used to set the response of the MicroLink ISDN i to a transition of the control line DTR from ON to OFF.

AT commands: Detailed description

With the setting AT&D0, the MicroLink ISDN i ignores the DTR transition from ON to OFF.

With AT&D1, the transition of the DTR control line from ON to OFF has the following effects: If the MicroLink ISDN i is in the command phase, the tran sition has no effect. During the establishment of a connection, the ON to OFF DTR transition aborts the connection. If the MicroLink ISDN i is in the trans mission phase (i.e. with an existing connection), it will switch to the command phase.

With AT&D2, the transition of the DTR control line from ON to OFF has the following effects: If the MicroLink ISDN i is in the command phase, the tran sition has no effect. During the establishment of a connection, the ON to OFF DTR transition aborts the connection. If the MicroLink ISDN i is in the trans mission phase (i.e. with an existing connection), it will abort the connection and switch to the command phase.

With AT&D3 the MicroLink ISDN i's response is the same as with AT&D2. In addition, the MicroLink ISDN i is reinitialized by the DTR transition from ON to OFF (see also ATZ and AT&Y).

With AT&D2 and AT&D3 as well as DTR = OFF, the MicroLink ISDN i does not return a RING for incoming calls. Automatic call answering is not possi ble until after the DTR transition from OFF to ON. A RING message with sub-

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AT commands: Detailed description

sequent call answering can be enabled despite DTR = OFF by setting bit 7 in register S28.

\D DSR/CTS control

*AT\D0 : DSR and CTS always active

AT\D1 : DSR tracks transmission channel

and CTS always active

AT\D2 : DSR always active and CTS tracks DCD

AT\D3 : DSR tracks transmission channel

and CTS tracks DCD

This command affects the significance of the signal lines DSR and CTS. If hardware flow control is used, the AT\D command setting has no effect on the CTS signal line in the transmission phase.

E Command Echo to Host

ATE0 : Commands not echoed

*ATE1 : Commands echoed

This command permits the choice of whether the MicroLink ISDN i returns the input commands as an echo or not.

&F Load default configuration

AT&F

This is used to load the firmware's default parameter settings. The MicroLink ISDN i is thus reset to its factory defaults. This command is not executed dur ing existing connections.

The dial-number memory, charge statistics, configuration profiles and ISDN settings are not reset by the command AT&F, however.

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AT commands: Detailed description

\F Display of stored telephone numbers

AT\F

This command lists the calling numbers in position 0 to 9 that were stored by means of the AT\P and AT&Z commands.

H Hang up

ATH

This command is used to hang up an existing connection if the MicroLink ISDN i is in the command mode after an escape command or a DTR transition from ON to OFF with a preceding AT&D1.

H2 Call rejected

ATH2

If ATH2 is input in response to an incoming RING, the caller receives the message “call rejected”.

I Report version number

ATI0 : Report product code in nnn format

ATI1 : Report checksum

ATI2 : Report checksum result (OK or ERROR)

ATI3 : Report version number and firmware

release date

ATI4 : Display of current parameters

ATI5 : Report serial number and hardware

release

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AT commands: Detailed description

ATI6 : Display product name

ATI7 : Report self-test result

ATI9 : Report Plug & Play ID text

$I? Display of current ISDN parameters

AT$I?

Use this command to display the modem's current ISDN configuration.

$IBP Setting the B-channel protocol

AT$IBP=<Wert1>

This command is used to select the operating mode of the MicroLink ISDN i. The ISDN modem attempts to establish an error-corrected X.75 connection by default. If the remote station does not support X.75, the adapter automati cally falls back to HDCLP mode via V.120:

Parameter Value Description

<Value1> X75 X.75 protocol

X75T70 T.70NL protocol

V120 V.120 protocol

V110 V.110 protocol

HDLC HDLC protocol

TRANS Transparent

HDLCP HDLC-PPP protocol

BTX X.75, T.70NL and Cept/Kit X75FB1 X.75 → HDLCP

X75FB2 X.75 → V.120 → HDLCP

X75FB3 X.75 → V.1 20 V120FB1 V.120 → HDLCP

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AT commands: Detailed description

Example

To establish an error-corrected V.120 connection with the MicroLink ISDN i, enter the following command:

AT$IBP=V120

The default value for the MicroLink ISDN i is X75FB2.

$IBR Setting the ISDN bit rate

AT$IBR=<Value1>

This command is used to select the desired bit rate on the ISDN side. The MicroLink ISDN i operates at a transmission speed of 64,000 bps by default.

Parameter Value Description

<Value1> 64000 ISDN bit rate 64,000 bps

56000 ISDN bit rate 56,000 bps

$ICI Charge information

AT$ICI? : Display charge information

AT$ICI=p,0: Delete charge information for port

This command is used to display the total connect charges, as well as the connect charges for the previous connection. The charges could be displayed as follows:

$ICI:=0,113,1 (113 = total charges, 1 = last call on port 0).

Parameter Value Description

p 0 Port 0 (V.24 interface)

The current-charge display is automatically reset to 0 after the next dialing process. The total-charge information can be deleted with the command AT$ICI=0,0.

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AT commands: Detailed description

$ICLI Setting and suppressing your own

Example

calling number

AT$ICLI=p,"MSN",i

Use this command to stop your own multiple subscriber number (MSN) being transmitted to the other party. The following settings are valid:

Parameter Value Description

p 0 Port 0 (V.24 interface)

i 0 MSN is suppressed

1 MSN is transmitted

If the calling number is not to be transmitted, enter the following command:

AT$ICLI=0,"",0

By default no calling number is entered on the MicroLink ISDN i.

$IDBS Setting the data block length

AT$IDBS=<Value1>,<Value2>,<Value3>

This command is used to set the data block length. It can be used to ensure compatibility to other B-channel protocols. The following settings are valid:

Parameter Standard Description

<Value1> 2048 Data block length for X.75 (4-2048) bytes

<Value2> 2048 Data block length for HDLCP and HDLC

(1-2048) bytes

<Value3> 259 Data block length for V.120 (5-259) bytes

$IDP Setting the D-channel protocol

AT$IDP=<Value1>

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AT commands: Detailed description

This command is used to set the D-channel protocol. The adjustment may not be made during a connection or with a call pending. All changes are auto matically recorded in the nonvolatile memory and are preserved until the next change.

Parameter Value Description

<Value1> DSS1 Euro-ISDN (DSS1 protocol)

1TR6 German national ISDN (1TR6 protocol)

AUTO Automatic setting of the D-channel protocol

Example

To set the MicroLink ISDN i to the 1TR6 protocol, enter the following command:

AT$IDP=1TR6

The MicroLink ISDN i is set to the DSS1 protocol by default.

The DSS1PP may interfere with other units on the same ISDN Basic Rate Interface. This protocol should only be selected when using an ISDN point-to-point connection.

$IEAZ Setting the terminal selection digit (EAZ)

AT$IEAZ=p,<"EAZ">

This command is only relevant for the German national protocol (1TR6). If the command is entered in the DSS1 mode, it will not become valid until switch ing to the 1TR6 protocol. This command is used to determine which terminal selection digit should be used to answer incoming calls.

In addition, the terminal selection digit used for outgoing calls is also established. All changes are automatically recorded in the nonvolatile memory and are preserved until the next change.

Parameter

p 0 Port 0 (V.24 interface)

Value Description

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AT commands: Detailed description

The terminal selection digit is accepted as follows:

Example

0 1 to 9 10 to 19

If you wish to assign EAZ 8 enter the following command:

Terminal selection digit used for incoming calls

0 0 and corresponding 1 to 9 corresponding 0 to 9

Terminal selection digit used for outgoing calls

0 corresponding 1 to 9 corresponding 0 to 9

AT$IEAZ=0,2,"8"

Use the command AT$IEAZ=0,"" to delete the EAZ. No EAZ is assigned to the MicroLink ISDN i by default. All calls are thus answered.

$IMSN Call acceptance from Multiple Subscriber

Numbers (MSNs)

AT$IMSN=p,<"MSN1">,<"MSN2">,<"MSN3">

This command is only relevant for the DSS1 protocol (Euro-ISDN). This command can be used to restrict call answering. If no multiple subscriber number (MSN) is specified here, all calls will be answered, regardless of the target dial number specified for the incoming call. A maximum of three caller IDs can be stored. The caller ID may consist of a maximum of 20 digits (0 to 9). No further commands can be executed from the same command line after this command.

Incoming calls without stated target dial numbers will always be answered. All changes are automatically recorded in the nonvolatile memory and are preserved until the next change

Parameter Value Description

p 0 Port 0 (V.24 interface)

<"MSN1"> 0..9 Store 1st MSN

<"MSN2"> 0..9 Store 2nd MSN

<"MSN3"> 0..9 Store 3rd MSN

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AT commands: Detailed description

The dial number is entered in Germany without the use of the local or national codes.

Example

To assign the dial number 12345 to the modem for MSN1, enter the following command:

AT$IMSN=0,"12345"

To change MSN3 only, enter the following command:

AT$IMSN=0,,,"12347"

The MSN can be deleted with the command AT$IMSN=0,"". No MSN is assigned to the MicroLink ISDN i by default.

$IRES Reset of ISDN settings

AT$IRES

This command is used to reset all ISDN settings to factory default.The current ISDN configuration of the terminal adapter may be displayed using the AT$I? command.

$ISCI Service characteristics for incoming

analog calls

AT$ISCI=p,<Value1>,<Value2>,<Value3>,<Value4>

This command is used to determine which incoming analog calls will be answered. Modifications must be saved using the AT*W or AT&W com mands. The following settings are valid:

Parameter Value Description

p 0 Port 0 (V.24 interface)

<Value1> 0 Telephone service (3.1 kHz telephone service) off

<Value2> 0 Telephone service (analog telephone service) off

1 Telephone service (3.1 kHz telephone service) on

1 Telephone service (analog telephone service) on

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AT commands: Detailed description

Parameter Value Description

Example

<Value3> 0 Group 2 fax operation off

1 Group 2 fax operation on

<Value4> 0 Group 3 fax operation off

1 Group 3 fax operation on

To set the MicroLink ISDN i for Group 3 fax operation, enter the following command:

AT$ISCI=0,0,0,0,1

$ISCO Service characteristics for outgoing

analog calls

AT$ISCO=p,<Value1>

This command is used to set the bearer capability for outgoing calls. You may select the terminal devices (e.g. telephone or fax) which are to be addressed. Modifications must be saved using the AT*W or AT&W commands. The fol lowing settings are valid:

Example

To set the MicroLink ISDN i for Group 3 fax operation, enter the following command:

AT$ISCO=0,3

The MicroLink ISDN i is set to the value 1 (telephone service (analog telephone service)) by default.

devolo MicroLink ISDN i

Parameter Value Description

p 0 Port 0 (V.24 interface)

<Value1> 0 Telephone service (3.1 kHz telephone service)

1 Telephone service (analog telephone service)

2 Group 2 fax operation

3 Group 3 fax operation

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AT commands: Detailed description

-M Plain text CONNECT messages

*AT-M0 : Plain text CONNECT messages

dependent on AT\V

AT-M1 : Plain text CONNECT messages

independent of AT\V

With the default setting AT-M0, the return of plain text CONNECT messages is dependent on the setting of the command AT\V. The bit rate at which the connection was established is always returned.

The transfer speeds are not differentiated in plain text with the setting AT-M1. (CONNECT messages in short form are identical to those of AT-M0). If the MicroLink ISDN i is configured to ATX0, then the command AT-M has no effect.

O Transition to online status

ATO

The command ATO can be used to switch back into the transfer mode to resume online data transmission if the MicroLink ISDN i is in the command mode after an escape command or a DTR transition from ON to OFF with a preceding AT&D1.

\P Storing dial numbers

AT\Pmn

Up to ten dial numbers (m = 0 to 9) can be stored using this command.

The stored numbers n can be dialed using the commands ATDS, ATDS=m, ATD/ or ATD/m. These numbers remain when the modem is switched off. The command AT\Pm deletes the number stored at location m.

The command AT\P corresponds to the command AT&Z. The numbers stored with the command AT\P can thus be overwritten with the command AT&Z. The number stored at location 0 is also used for automatic dialing with DTR (see AT$D).

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AT commands: Detailed description

The command AT\F can be used to display and verify the stored numbers.

No further commands can be executed from the same command line after the command AT\P.

Q Suppressing messages

*ATQ0 : Return of messages from ISDN modem on

ATQ1 : Return of messages from ISDN modem

off

ATQ2 : Messages off in answer mode

With this command, messages to the attached computer by the ISDN modem can be completely suppressed (ATQ1) or suppressed in the answer mode only (ATQ2).

*Q Message after return to transfer phase

*AT*Q0 : CONNECT message after invalid

escape sequence

AT*Q1 : No CONNECT message after invalid

escape sequence

The return of the CONNECT message can be suppressed after an invalid escape sequence with this command.

\Q Data flow control on the serial port

AT\Q0 : No handshake

AT\Q1 : Bidirectional XON/XOFF handshake

AT\Q2 : Unidirectional CTS handshake

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AT commands: Detailed description

*AT\Q3 : Bidirectional RTS/CTS handshake

AT\Q4 : Unidirectional XON/XOFF handshake

This command is used to select a variety of handshake procedures for serial port data flow control.

Data flow control is especially important if the transmission speed to/from the computer is not identical to the speed on the telephone side. This is the case when using error correction and data compression, for example. With out a handshake procedure the danger of a buffer overflow is inevitable.

The data flow in the interface lines is monitored RTS (Request To Send) and CTS (Clear To Send) when using a hardware handshake with the commands AT\Q2 and AT\Q3. Data output to the computer is stopped if the RTS signal line is OFF. The transition to ON permits the output of the received data to continue. If the MicroLink ISDN i continues to receive from the telephone line, the data is temporarily stored in the receive buffer. If the send buffer of the MicroLink ISDN i is full, it switches the CTS (Clear To Send) signal line to OFF, stopping the data output from the computer.

The commands AT\Q1 and AT\Q4 are used to select a software handshake using the XON/XOFF characters. If the MicroLink ISDN i receives the <DC3> character (S-s = XOFF) from the computer, then the data output is stopped until a <DC1> (S-q = XON) is sent. Conversely, the MicroLink ISDN i sends a <DC3> or <DC1> sequence to the computer if a transmission buffer is full or ready again. Whether the XON and XOFF characters are sent to the MicroLink ISDN i depends on the setting of the command AT\X. They are not sent by default.

In unidirectional handshake processes, the handshake signals issued by the computer are ignored.

S Set and read the internal register

ATSn=x : Sets register n to value x

ATSn? : Reads the value of register n

ATSn : Sets pointer to register n

AT? : Reads the value of last register used

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AT commands: Detailed description

AT=x : Sets the value of last register used to x

The register number n and register value x are returned as a numerical ASCII string. The valid values for x may be restricted (see register S0, for example). Please refer to chapter “Description of registers” for information about the S register and changing bit-oriented registers. If a register is set to an invalid value the command is ignored and returns ERROR. If an invalid setting is made in a bit-oriented register, only that particular setting will be ignored; all other valid bits will be accepted.

\T Inactivity timer

AT\Tn : (n = 0..255 * 10 seconds; default value = 0)

This command can be used to control the period of time after which the MicroLink ISDN i automatically breaks the connection if no data has been sent in the mean time. The default value 0 switches the inactivity timer off.

$UPX Firmware upload in flash ROM

AT$UPX

New firmware can be loaded to the flash ROM using the command AT$UPX. After issuing the command, the firmware file must be sent to the MicroLink ISDN i using the XModem protocol. The firmware file can be found on the CD which was included with the unit. The current version can be found in our online services www.devolo.de.

V Messages in short form/plain text

ATV0 : Messages in short form as a digit

*ATV1 : Messages in plain text

This command can be used to select numerical short form or plain text for the messages sent by the MicroLink ISDN i to the attached computer. The mes sages in short form and plain text are covered in the chapter “Description of messages”.

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AT commands: Detailed description

%V Display of firmware version

AT%V

This command is used to display the firmware version of the ISDN modem.

&V Display configuration profiles

AT&V

This command returns the current, as well as the two stored configuration profiles, 0 and 1 (see also commands AT&W and AT*W) of the MicroLink ISDN i.

\V CONNECT with error-free connections

AT\V0 : No modified CONNECT messages

AT\V1 : Identification of connections with

error correction

AT\V2 : Additional distinction of correction

processes

*AT\V8 : Detailed CONNECT messages

With the setting AT\V0, call establishment messages are issued in the CONNECT xxxxx form.

With the setting AT\V1, call establishment messages are issued in the CONNECT xxxxx/REL form.

AT\V2 provides additional information regarding the correction process in

the form of CONNECT xxxxx/REL-LAPB.

With the configuration AT\V8 the call establishment messages are issued in the CONNECT xxxxx/ISDN/X75 form.

xxxxx stands for the speed with which the connection was established.

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AT commands: Detailed description

If the MicroLink ISDN i is configured to ATX0 or AT-M1, then the command AT\V will have no effect on the plain text CONNECT messages.

&W Save configuration profile

AT&Wn : Save configuration profile n (n = 0, 1)

This command is used to save the current configuration of the MicroLink ISDN i. All parameters that were set using AT commands, as well as a number that were set using the S registers are saved. These values are pre served when the modem is switched off.

Registers for which the current value cannot be saved using the command AT&W are saved with their default values.

*W Save complete configuration profile

AT*Wn : Save complete configuration profile

n (n = 0, 1)

This command is used to save the current configuration of the MicroLink ISDN i. All parameters that were set using AT commands and S registers are saved. These values are preserved when the modem is switched off.

A configuration profile should be saved using the command AT*W.

X Handling of busy signals/CONNECT

messages

ATX0 : Busy signal returns NO CARRIER

ATX1 : Busy signal returns NO CARRIER

ATX2 : Busy signal returns NO CARRIER

ATX3 : Busy signal returns BUSY

*ATX4 : Busy signal returns BUSY

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AT commands: Detailed description

This command can be used to set the modem to respond to busy signals on outgoing connections with the messages NO CARRIER or BUSY.

The command ATX0 is also relevant for messages returned during call establishment. Regardless of the speed or type of connection, only the messages CONNECT (plain text) or 1 (short form) are issued.

\X Handling of XON/XOFF

*AT\X0 : XON/XOFF characters are not sent

AT\X1 : XON/XOFF characters are sent

This command affects the handling of the XON and XOFF characters used for flow control when XON/XOFF software handshaking is selected (see also

AT\Q).

When AT\X0 is set, the XON/XOFF characters are used solely to control the data flow between the local MicroLink ISDN i and the computer and are not sent to the remote system.

When this is set to AT\X1, these characters control the data flow between the local MicroLink ISDN i and computer and are sent to the remote system.

&Y Set pointer to configuration profile

*AT&Y0 :Set pointer to configuration profile to 0

AT&Y1 :Set pointer to configuration profile to 1

This command is used to set a pointer to one of the two stored configuration profiles (0 or 1). The marked configuration profile is loaded when switching the adapter on or during an initialization triggered by the transition of DTR from ON to OFF (see command AT&D).

Z Load configuration profile

ATZn : Load configuration profile n (n = 0, 1)

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AT commands: Detailed description

If a connection exists it will be aborted. Then any parameter settings saved with the AT&W or AT*W commands (configuration profile 0 or 1) are loaded.

No further commands can be executed from the same command line after the command ATZ.

&Z Storing dial number

AT&Zm=n : Store dial number n at location m

AT&Z=n : Store dial number n at location 0

Up to ten dial numbers (m = 0 to 9) can be stored using this command.

The stored numbers n can be dialed using the commands ATDS, ATDS=m, ATD/ or ATD/m. These numbers remain when the modem is switched off. The command AT&Zm deletes the number stored at location m.

The command AT&Z corresponds to the command AT\P. The numbers stored with the command AT&Z can thus be overwritten with the command AT\P (see also the command AT\P).

The command AT\F can be used to display and verify the stored numbers. The same remarks apply to n as for the command ATD.

No further commands can be executed from the same command line after the command AT&Z.

. Setting and reading a bit in a register

AT.m=x : Sets the bit m to the value x

(m = 0 to 7; x = 0 to 1)

AT.m? : Reads the value of bit m

ATSn.m=x : Sets bit m in register n to value x

(m = 0..7; x = 0..1)

Register values can be changed using this command. The value set for the bit m can be set to the value x in the corresponding register. If access is not permitted, the value in the S register remains unchanged and the MicroLink ISDN i returns ERROR.

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AT commands: Detailed description

Example

If bit 6 is to be set in register S14, then the command ATS14.6=1 must be executed.

=? Query of the value range of a command

This command can be used to display all valid values for an AT command.

If the command AT$IDP=? is entered for example, all valid values for the command AT$IDP are returned.

If, for example, the command AT$IMSN=? is entered, the value range for the ASCII code for the individual characters is returned (48-57 correspond to '0' to '9').

3.1 Description of registers

The modem has internal registers with which you can change the configuration (see also ATSn command). Please refer to the following description for the significance of the registers.

S0 Automatic call answering

Valid values 0 to 5 RING signals

Default value 0 (no automatic call answering)

Store in nonvolatile memory AT&W or AT*W

The automatic answering of calls can be set in the register S0. If S0>0, every incoming call will be automatically answered. The S0 value determines the number of messages to wait for before the call is answered. These messages (e.g. 'RING') are returned at 5-second intervals during the time that a call is pending.

If S0>0, the call establishment can be aborted by the input of any character other than line feed. Call establishment is not aborted, however, if bit 6 of register S14 has been set to 1 (default = 0). This setting permits the attached computer to send characters to the MicroLink ISDN i during call establish ment.

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AT commands: Detailed description

S1 Counter for messages for a pending call

Valid values 0 to 255 RING signals

Default value 0

Store in nonvolatile memory no

Register S1 contains the number of messages for a pending call ('RING' every 5 seconds). The S1 value is reset to 0 when the call is answered or is no longer pending.

S2 Escape code characters

Valid values 0 to 255 decimal

Default value 43 (+)

Store in nonvolatile memory AT*W

The escape command '+++', which is used to switch from the transfer phase to the command phase, can be changed in register S2.

The transition to the command phase is blocked by values >127.

S3 Carriage return characters

Valid values 0 to 127 decimal

Default value 13 (carriage return)

Store in nonvolatile memory AT*W

The character for M can be redefined in register S3.

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AT commands: Detailed description

S4 Line-feed character

Valid values 0 to 127 decimal

Default value 10 (line feed)

Store in nonvolatile memory AT*W

The line-feed character can be redefined in register S4.

S5 Backspace character

Valid values 0 to 32, 127 decimal

Default value 8 (backspace)

Store in nonvolatile memory AT*W

The backspace character can be redefined in register S5.

S12 Escape prompt delay

Valid values 0 to 255 (1/50 sec.)

Default value 50 (1 sec.)

Store in nonvolatile memory AT*W

The length of the escape prompt delay is established in register S12.

S14 Bit-oriented option

The contents of register S14 is stored in the nonvolatile memory with the commands AT&W or AT*W. The individual bits have the following signifi cance:

Bit Dec. Description Command

0 0 0 Reserved

1 0 0 No command echo to host ATE0

2 1 Command echo to host ATE1

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AT commands: Detailed description

Bit Dec. Description Command

2 0 0 Messages on ATQ0

4 1 Messages off ATQ

3 0 0 Messages in short form ATV 0

8 1 Messages in plain text ATV1

4..5 0 0 Reserved

6 0 0 Polling not possible during call establish-

64 1 Polling possible during call establish-

7 0 0 ISDN modem in answer mode

128 1 ISDN modem in originate mode

S21 Bit-oriented option

The contents of register S21 is stored in the nonvolatile memory with the commands AT&W or AT*W. The individual bits have the following signifi cance:

ment (the call establishment is aborted by any characters other than LF, XON and XOFF)

ment

Bit Dec. Description Command

0..2 0 0 Reserved

3..4 0 0 Ignore transition of DTR status AT& D0

8 1 Switch to command phase if DTR → OFF AT&D1

16 2 Abort connection if DTR → OFF AT&D2

24 3 Reinitialize if DTR → OFF AT &D3

5..7 0 0 Reserved

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S22 Bit-oriented option

AT commands: Detailed description

The contents of register S22 is stored in the nonvolatile memory with the commands AT&W or AT*W. The individual bits have the following signifi cance:

Bit Dec. Description Command

0..3 0 Reserved

4..6 0 Busy situation → NO CARRIER ATX0

64 Busy situation → NO CARRIER ATX1 80 Busy situation → NO CARRIER ATX2 96 Busy situation → BUSY ATX3

112 Busy situation → BUSY ATX4

7 0 Reserved

S23 Bit-oriented option

The contents of register S23 is stored in the nonvolatile memory with the commands AT&W or AT*W. The individual bits have the following signifi cance:

Bit Dec. Description

0..3 0 0 Reserved

4..5 0 0 7E1 (7 data bits, even parity, 1 stop bit)

16 1 8N1 (8 data bits, no parity, 1 stop bit)

32 2 7O1 (7 data bits, odd parity, 1 stop bit)

48 3 7N2 (7 data bits, no parity, 2 stop bits)

6..7 0 0 Reserved

The values in bit 4 and 5 are overwritten with each AT command issued unless the automatic bit rate identification is switched off in register S51.

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AT commands: Detailed description

S30 Inactivity timer

Valid values 0 to 255 (10 sec.)

Default value 0 (timer off)

Store in nonvolatile memory AT&W or AT*W

In the S30 register you can set the time period after which the MicroLink ISDN i automatically terminates the connection if no data is sent or received in the meantime. The value 0 switches the inactivity timer off.

S31 Bit-oriented option

The contents of register S31 is stored in the nonvolatile memory with the commands AT&W or AT*W. The individual bits have the following signifi cance:

Bit Dec. Description Command

0..4 0 0 Reserved

5 0 0 DTR dialing off AT$D0

32 1 DTR dialing on AT$D1

6..7 0 0 Reserved

S51 Bit-oriented option

The contents of register S51 is stored in the nonvolatile memory with the commands AT&W or AT*W. The individual bits have the following signifi cance:

Bit Dec. Description Command

0..3 0 0 No handshake AT\Q0

1 1 XON/XOFF bidirectional AT\Q1

2 2 RTS/CTS unidirectional AT\Q2

4 0 0 XON/XOFF characters are not sent AT\X0

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3 3 RTS/CTS bidirectional AT\Q3

4 4 XON/XOFF unidirectional AT\Q4

Page 41

AT commands: Detailed description

Bit Dec. Description Command

16 1 XON/XOFF characters are sent AT\X1

5..6 0 0 Reserved

7 0 0 Automatic bit rate identification on

128 1 Automatic bit rate identification off

S52 Bit-oriented option

The contents of register S52 is stored in the nonvolatile memory with the commands AT&W or AT*W. The individual bits have the following signifi cance:

Bit Dec. Description

0..1 0 0 DSR always active, CTS always active AT\D0

1 1 DSR tracks answer signal, CTS always active AT\D1

2 2 DSR always active, CTS tracks DCD AT\D2

3 3 DSR tracks answer signal, CTS tracks DCD AT\D3

Comman d

2 0 0 DCD always active (ON) AT& C0

4 1 DCD displays existing carrier AT&C1

3..7 0 0 Reserved

S53 Bit-oriented option

The contents of register S53 is stored in the nonvolatile memory with the commands AT&W or AT*W. The setting is only effective in the transfer phase. The individual bits have the following significance:

Bit Dec. Describtion

0..4 0 0 Reserved

5 0 0 No parity bit transmission at 7E1 & 7O1 via ISDN

32 1 Parity bit transmission at 7E1 & 7O1 via ISDN with e.

g. X.75 according to the data format from register S23

6..7 0 0 Reserved

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AT commands: Detailed description

S54 Bit-oriented option

Register S54 is independent of the command AT&F. The contents of register S54 are stored in the nonvolatile memory with the command AT*W.

Bit Dec. Description

0..4 0 0 Reserved

5 0 0 Serial speed is loaded during reinitiali-

32 1 Serial speed is not modified during reinitiali-

6..7 0 0 Reserved

S93 Computer-side speed

The contents of register S93 is stored in the nonvolatile memory with the commands AT&W or AT*W. The individual bits have the following signifi cance:

zation (ATZ)

Bit Dec. Description

0..7 3 3 Computer-side bit rate 300 bps

4 4 Computer-side bit rate 600 bps

5 5 Computer-side bit rate 1200 bps

6 6 Computer-side bit rate 2400 bps

7 7 Computer-side bit rate 4800 bps

8 8 Computer-side bit rate 7200 bps

9 9 Computer-side bit rate 9600 bps

10 10 Computer-side bit rate 12,000 bps

11 11 Computer-side bit rate 14,400 bps

12 12 Computer-side bit rate 19,200 bps

13 13 Computer-side bit rate 38,400 bps

14 14 Computer-side bit rate 57,600 bps

15 15 Computer-side bit rate 76,800 bps

16 16 Computer-side bit rate 115,200 bps

17 17 Computer-side bit rate 230,000 bps

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The S93 value is overwritten after every AT unless the automatic bit rate identification is switched off in register S51.

S95 Bit-oriented option

The contents of register S95 is stored in the nonvolatile memory with the commands AT&W or AT*W. The individual bits have the following signifi cance:

Bit Dec. Description Command

0..3 0 0 CONNECT messages not modified AT\V0

1 1 Identification of error-free connections AT\V1

2 2 Differentiation of MNP – V.42 AT\V2

8 8 Detailed acknowledgment AT\V8

AT commands: Detailed description

4 0 0 CONNECT messages dependent on

AT\V

16 1 CONNECT messages independent of AT\V AT-M1

5 0 0 CONNECT message after invalid

escape sequence

32 1 No CONNECT message after invalid

escape sequence

6..7 0 0 Messages on ATQ0

64 1 Messages off ATQ

128 2 Messages off in answer mode ATQ2

S96 Bit-oriented option

The contents of register S96 is stored in the nonvolatile memory with the command AT*W. The individual bits have the following significance:

Bit Dec. Description

AT-M0

AT*Q0

AT*Q1

0..1 0 0 Decimal display of S registers

2 0 0 Message 'Continue with any character...' yes

1 1 Hexadecimal display of S registers

2 2 Binary display of S registers

4 1 Message 'Continue with any character...' no

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AT commands: Detailed description

Bit Dec. Description

3 0 0 Display of messages in plain text (German)

8 1 Display of messages in plain text (English)

4..7 0 0 Reserved

S150 Display of ISDN bit rate/operating mode

The transmission speed achieved can be displayed in register S150 after the establishment of a connection. This register can be read only.

Bit Dec. Description

0..4 0 No ISDN connection

8 ISDN connection 56,000 bps

9 ISDN connection 64,000 bps

10 Reserved

11 Reserved

12 Reserved

5..7 0 Reserved

S151 ISDN protocol configuration

The contents of register S151 can be stored with the commands AT&W or AT*W. The details of the D-channel protocol can be set with the S151 reg

ister:

Bit Dec. Description

0 0 0 Error message to network if unit is busy or not oper-

ational

1 1 No response to network if unit is busy or not opera-

tional

1 0 0 Incoming calls are acknowledged with ALERT

2 1 No ALERT is sent upon incoming calls

2 0 0 No LLC for V.120

4 1 LLC for V.120

3 0 0 Reserved

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Bit Dec. Description

AT commands: Detailed description

4 0 0 Incoming calls on B channel 1 are answered

16 1 Incoming calls on B channel 1 are ignored

5 0 0 Incoming calls on B channel 2 are answered

32 1 Incoming calls on B channel 2 are ignored

6..7 0 0 Reserved

All V.120 CompuServe nodes can be reached by using Low Layer Compatibility (LLC) for V.120.

S152 Call signaling delay

Valid values 0 to 50 1/10 seconds

Default value 0

Store in nonvolatile memory AT&W or AT*W

A delay of the signaling of incoming calls can be set in register S152. An incoming call is not signaled to the computer until a preset period of time has elapsed and the call is still pending on the network side. This register can be used to prevent a conflict of multiple terminal devices on the same line with the same service indicator/bearer capability and EAZ/MSN by giving a differ ent device priority. No signaling delay takes place with the default value 0.

S153 CONNECT/NO CARRIER message

The contents of register S153 can be stored with the commands AT&W or AT*W. The individual bits have the following significance:

Bit Dec. Description

0 0 0 Caller ID of the remote station is not dis-

1 0 0 Caller ID of the remote station is not dis-

played after a CONNECT

1 1 Caller ID is displayed after a CONNECT

played after RING

2 1 Caller ID is displayed after RING

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AT commands: Detailed description

Bit Dec. Description

2 0 0 No display of the EAZ/MSN selected by the

3..5 0 Reserved

6 0 0 No display of the messages: ALERTING,

7 0 0 Cause of the aborted connection is not dis-

S154/S155 Error codes

In the event of errors (no connection established or aborted connections), the contents of the registers S154 and S155 return error codes which may be used to localize the problem. These registers can be read only. A list of error messages may be found in the appendix “Error Messages”.

remote station

4 1 With bit 0 and/or bit 1=1, the selected EAZ/MSN

is displayed

CALL SENT, CONNECTING

64 1 Display of the messages: CONNECTING, ALERT-

ING, CALL SENT

played

128 1 Cause of the aborted connection displayed by

S154/S155 after NO CARRIER

S156 Receiving packet retransmissions on

D-channel

Valid values 0 to 255 1/250 data packets

Default value 0

Store in nonvolatile memory No

Register S156 contains the number of incorrectly received data packets in the signaling channel (D channel) for every 250 data packets. This register can be read only. The contents of this register can only be reset by switching the adapter off and back on.

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AT commands: Detailed description

S157 Sending packet retransmissions on

D channel

Valid values 0 to 255 1/250 data packets

Default value 0

Store in nonvolatile memory No

Register S157 contains the number of transmit repetitions required in the signaling channel (D channel) for every 250 data packets. This register can be read only. The contents of this register can only be reset by switching the adapter off and back on.

S158 Current/previous B channel

S158 Description

000 001 002

No connection has been established Current/previous connection on B channel 1 Current/previous connection on B channel 2

S159 Status of the S0 interface

Bit Dec. Description

0..1 0 0 Reserved

2 0 0 S0 bus not activated

4 1 S0 bus activated

3 0 0 No TEI assigned

8 1 TEI is assigned

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AT commands: Detailed description

Bit Dec. Description

4 0 0 D channel level 2 not established

16 1 D channel level 2 is established

5..7 0 0 Reserved

S160 Call signaling information

Dec. Hex. Description

000 00h No call was pending

016 10h Call currently being signaled

017 11h Call answered

018 12h Call attempt ended or answered by another device on the S0 bus

032 20h Call had incorrect Service Indicator (1TR6) or incorrect Bearer Capa-

bility (DSS1)

033 21h Call had incorrect EAZ or incorrect MSN/DN

048 30h DTR (line S1) was in off-state, call was ignored

049 31h ISDN adapter had another connection or establishing another con-

nection (BUSY)

064 40h Dial number monitoring not in order

065 41h Dial number monitoring not in order, no number specified

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AT commands: Detailed description

S162 B-channel settings for outgoing calls

The contents of register S162 are stored in the nonvolatile memory with the commands AT&W or AT*W. The individual bits have the following signifi cance.

Bit Dec. Description

0..1 0 0 B channel is random

1 1 B1 channel has priority, can be changed to B2 by

exchange if B1 is busy.

2 2 B2 channel has priority, can be changed to B1 by

exchange if B2 is busy.

S163/S164 Service indicator/additional service

indicator

Registers S163 and S164 contain the Service Indicator and the Additional Service Indicator of the last connection or the last incoming call if the con nection attempt failed. These registers can be read only. The coding is effected as 1TR6 code.

S163 S164 Description

007 169 Bit rate adjustment to 56,000 bps (automatic switching to 56,000 bps

at V.120/X.75/HDLC)

Other Data transfer 64,000 bps

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AT commands: Detailed description

S174 ISDN/modem operation

Register S174 may be used to toggle between ISDN and modem operation. The contents of register S174 can be stored with the commands AT&W or

AT*W. The individual bits in register S174 have the following significance:

Bit Dec. Description

0..1 0 0 Answer digital calls

1 1 Answer analog calls

2 2 Answer digital and analog calls

2..3 0 0 Outgoing digital call

4 1 Outgoing analog call

8 2 First digital, then analog call

4..7 0 0 Reserved

S180 B-channel protocol settings

Register S180 is used to select the operating mode of the MicroLink ISDN i. The individual bits in register S180 have the following significance:

Bit Dec. Description

0..4 0 0 No protocol selected

1 1 X.75

2 2 T.70NL (X.75/T70)

3 3 V.120

4 4 HDLC

5 5 Transparent

6 6 HDLC-PPP

7 7 X.75, T.70NL and Cept/Kit

8 8 V.110 12 12 X.75 → HDLCP

13 13 X.75 → V.120 → HDLCP

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Bit Dec. Description

AT commands: Detailed description

14 14 X.75 → V.1 20 18 18 V.120 → HDLCP

5..7 0 0 Reserved

S185 D-channel protocol settings

The D-channel protocol can be set using the register S185. The contents of register S185 can be stored with the commands AT&W or AT*W. The indi vidual bits in register S185 have the following significance:

Bit Dec. Description

0..1 0 0 Euro-ISDN (DSS1 protocol)

1 1 German national ISDN (1TR6 protocol)

2 2 Point-to-point protocol in DSS1

S194 Displaying the B-channel protocol

The agreed B-channel protocol can be displayed in register S194 after the establishment of a connection. This register can be read only.

Bit Dec. Description

0..3 0 0 No protocol selected

1 1 X.75

2 2 T.70NL (X.75/T70)

3 3 V.120

4 4 HDLC

5 5 Transparent

6 6 HDLC-PPP

7 7 X.75, T.70NL and Cept/Kit

8 8 V.110

4..7 0 0 Reserved

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AT commands: Detailed description

3.2 Description of messages

3.2.1 Commands with effect on messages

Insofar as the command ATQ1 is not active (messages off), the MicroLink ISDN i will acknowledge input commands and provide messages—regarding incoming calls or the establishment of a connection, for example.

With the default setting ATV1, the MicroLink ISDN i returns messages in plain text (followed by M and a line feed character). With the command ATV0, the messages are returned in short form as a digit (with a leading and concluding M

V1 V0 Description

OK 0 Command line executed

RING 2 Incoming call

NO CARRIER 3 No connection established, connection ended by

exchange of remote station, or inactivity timer elapsed (see also register S154/S155)

ERROR 4 Error during command input

NO DIALTONE 6 No connection to ISDN exchange or own connec-

tion is busy

BUSY 7 Requested subscriber or communication paths

busy

CALL SENT 252 Dial number complete, call being processed

ALERTING 253 Remote station alerting to call

CONNECTING 254 Call answered by remote station, line protocol

being negotiated

3.3 Caller ID of remote station

The ISDN supplies the caller ID of the incoming call, if this has not been suppressed by the remote station. Register S153 can be used to set whether this number should be displayed together with the RING and/or CONNECT mes sage.

Examples

RING;0241938800

CONNECT;0241938800

CONNECT 64000/ISDN/V120;0241938800

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AT commands: Detailed description

or, if the short form has been set:

2;0241938800

1;0241938800

70;0241938800

In addition, the target EAZ or target MSN used by the remote station can be displayed. This setting is also made in register S153

Example

RING;0241938800;MSN

CONNECT messages

The CONNECT messages, i.e. the messages regarding a successful connection, are influenced by the AT-M, AT\V and ATX commands.

NO CARRIER

The cause of the failed connection may also be displayed together with the “NO CARRIER” message (see also register S153).

NO CARRIER;053;016 = normal cancellation of the connection by the remote station.

The following table provides an overview of the CONNECT messages that may be displayed during ISDN operation:

Short form Plain text

60 CONNECT 1200

61 CONNECT 2400

62 CONNECT 4800

63 CONNECT 9600

64 CONNECT 19200

65 CONNECT 38400

66 CONNECT 48000

67 CONNECT 56000

68 CONNECT 56000/REL

69 CONNECT 64000

70 CONNECT 64000/REL

devolo MicroLink ISDN i

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AT commands: Detailed description

3.3.1 V.24 interface

The interface between the MicroLink ISDN i and the computer consists of a variety of data, control and signaling lines. The condition of most of the inter face lines is displayed by LEDs on the front of the unit.

The pin assignment of the V.24 interface for 9-pin or 25-pin connectors is as follows:

9-pin 25-pin DIN ITU-T USA Designation (USA)

U* 5

3 2

6 8 9 1

47 20

1 7

2 3

6 5 22 8

E1 E2

D1 D2

M1 M2 M3 M5

S1 S2

101 102

103 104

107 106 125 109

108 105

GND GND

TxD RxD

DSR CTS RI DCD

DTR RTS

Protective Ground Signal Ground

Transmit Data Receive Data

Data Set Ready Clear to Send Ring Indicator Data Carrier Detect

Data Terminal Ready Request to Send

* U = Housing/shield

The designations in the table name the functions of the lines (e.g. transmission data) as related to the data terminal (computer).

3.3.2 The interface lines have the following significance:

Computer/terminal operational – DTR = Data Terminal Ready

The effect of this control line on the MicroLink ISDN i is determined by the command AT&D.

Switch on transmission – RTS = Request To Send

Operational – DSR = Data Set Ready

This signal line is normally always active (ON), but is influenced by the commands AT\D and AT&S.

Clear to send – CTS = Clear To Send

This output is normally always active (ON), but is influenced by the commands AT\D, AT\Q and AT&R.

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Page 55

Incoming call – RI = Ring Indicator

This MicroLink ISDN i output becomes active (ON) when the adapter detects an incoming call (see also command ATA). Incoming calls are detected only if the DTR control line is active (ON) or the command AT&D0 has been issued.

Connection – DCD = Data Carrier Detect

This MicroLink ISDN i output normally becomes active (ON) when the adapter has established a valid connection.

3.4 Error messages

In the event of errors, the contents of the registers S154 and S155 return error codes which may be used to localize the problem. These registers can be read using the commands ATS154? or ATS155?.

AT commands: Detailed description

Error codes S154/S155

AT-level error group

001/001 Establishment of connection

001/003 Call not (no longer) present

001/004 Internet service provider proto-

001/005 Connection aborted by ATZ The command ATZ in the command

001/006 Inactivity timer elapsed (con-

Description Cause and possible correction

Input of characters during establishment aborted by character input dur ing establishment

(with ATA or ATO)

col error at the serial port

nection aborted)

of connection not permitted. If the input

of characters is to be permitted during call establishment, bit 6 must be set in register S14 (polling enabled during establishment of connection).

Opposite station has hung up or another unit has answered the call.

Reestablish the connection.

phase causes the abort of an existing connection.

No more data was transmitted during the time period specified in register S30 or by the AT\Tn command.

001/007 Establishment of connection

001/009 Establishment of connection

aborted by DTR = off

aborted by ATH

The DTR signal was deactivated, e.g. by the terminal program.

Establishment of connection canceled.

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AT commands: Detailed description

Error codes S154/S155

Local error messages

Description Cause and possible correction

051/001 Error in establishment of D

channel level 1

051/002 Error in establishment of D

channel level 2

051/003 Error in establishment of B

channel level 1

051/004 Error in establishment of B

channel level 2

051/005 Abort of D channel level 1 Check the cables and the ISDN S0 con-

051/006 Abort of D channel level 2 possible sources of errors. If applicable,

051/007 Abort of D channel level 3 Verify the selected D-channel protocol

051/008 Connection aborted, B channel

level 1

Check the cables and the ISDN S0 connection and remove additional ISDN terminal units from S0 bus to exclude other

possible sources of errors. If applicable, test the modem directly at the NT (net work terminator).

Check the B-channel protocol of the opposite station.

nection and remove additional ISDN terminal units from S0 bus to exclude other

test the modem directly at the NT (net work terminator).

(AT$IDP).

Connection aborted by the remote station or possible connection error.

051/009 Connection aborted, B channel

051/010 Connection aborted, B channel

051/011 Restart of connection, B channel

051/012 Restart of connection, B channel

051/013 B2 abort due to time-out T1 Register S30 timer elapsed, inactivity

ISDN error messages (valid for 1TR6 protocol)

052/000 Abort by network, no reason

052/128 Normal end of connection The connection was correctly ended by

devolo MicroLink ISDN i

Connection aborted by the remote sta-

level 2

level 3

level 2

level 3

given or reason not translatable

tion or possible connection error..

Reestablish the connection.

Connection error resulting in

Restart—data loss possible.

timer

Dial again.

both stations.

Page 57

Error codes S154/S155

AT commands: Detailed description

Description Cause and possible correction

052/131 Service not available at own or

remote connection or dialing of an incorrect number

052/138 Own connection is busy. Connection is in use by other terminal

052/144 Semi-permanent connection

(SPC) not supported by network

052/145 Requested service not available Service must be requested from network

052/160 Outgoing connection blocked Have blockage removed by network

052/161 Remote station busy Dial again later.

052/165 Semi-permanent connection

(SPC) not permitted between these subscribers

052/181 Target number, service or serv-

ice characteristic incorrect

Check the dial number and the enabling of the desired services (also applies to PBX systems).

devices. End existing connection if nec essary.

SPC must be requested from network operator.

operator.

SPC must be requested from network operator.

Check the dial number and the enabling of the desired services (also applies to PBX systems).

052/184 Target dial number has changed Obtain new number from the remote

station.

052/185 From remote terminal unit: Not

operational

052/186 Remote terminal unit does not

answer

052/187 Message from remote terminal

unit: Unit busy

052/189 Target subscriber: Blocked

against incoming connections

052/190 Target subscriber rejected con-

nection

052/217 Network bottleneck (e.g. con-

gestion)

Check the operational readiness of the remote station.

Check the operational readiness of the remote station and the terminal selec tion digit of the dial number.

Dial again later.

Check with remote station regarding blockage.

Check with remote station.

Dial again later.

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AT commands: Detailed description

Error codes S154/S155

Description Cause and possible correction

052/218 Rejected or disconnected by

remote terminal unit

052/240 Local procedure error (protocol

fault)

052/241 Remote procedure error (proto-

col fault)

Error codes S154/S155 Description

ISDN error messages (valid for DSS1 protocol)

053/001 Dial number is not assigned

053/002 No path to the requested transfer network

053/003 No path available to destination

053/006 Channel not accepted

053/016 Normal call trigger

053/017 Remote station busy

053/018 No response from remote station

053/019 Remote station does not answer

Dial again later or check with remote station.

Dial again.

053/021 Call rejected

053/022 Dial number has changed

053/027 Remote station not operational

053/028 Incorrect number

053/029 Service feature rejected

053/034 No channel available

053/038 ISDN network not operational

053/041 Temporary fault

053/042 ISDN network overloaded

053/044 Channel or service not available

053/047 Service not available

053/049 Service not available

053/050 Requested service not ordered

053/057 Service feature not permitted

053/058 Service feature not available

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AT commands: Detailed description

Error codes S154/S155 Description

053/063 Service or option not available

053/065 Service not available

053/066 Channel type not implemented

053/069 Requested characteristic does not exist

053/070 Data transfer service available only

053/079 Service or option does not exist

053/088 Remote station does not support

requested service

053/091 Invalid transmission network selection

053/127 Unknown ISDN error

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Appendix

4 Appendix

4.1 Status display and troubleshooting

The LEDs on the front panel show the condition of the interface lines or the condition of the modem.

S0 status

S0 line

Power

TxD (D1)– Data or command from local PC to ISDN modem

RxD (D2) – Data or messages from ISDN modem to local PC

DTR (S1)– Computer operational

RTS (S2) – Switch on transmit

CTS (M2) – ISDN modem clear to send

DCD (M5) – Connection established (red and green LED)

4.1.1 Status display

Green and yellow LEDs on the front panel of the ISDN terminal adapter serve as the status display of the ISDN connection.

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Page 61

Red LED (S0 status)

Appendix

The red LED indicates the status of your ISDN line and the connection to the exchange.

State of LED Description

Off Blinking quickly On

S0 bus not activated, normal state S0 bus activated, no TEI assigned S0 bus activated, TEI assigned

Red LED (S0 line)

The red LED indicates the connection state of the MicroLink ISDN i:

State of LED Description

Off Blinking slowly (once per sec., total 2 to 3x) Blinking quickly (3x per sec.) Constantly lit

No call, no connection Incoming call, terminal device is not responsible or terminal unit establishes connection itself Valid call pending, not (yet) answered

Connection being/is established

V.24 display

The V.24 display shows the state of the V.24 connection to the computer:

LED Description

TxD (D1) RxD (D2) DTR (S1) RTS (S2) CTS (M2) DCD (M5)

Data or commands from the local PC Data or messages from the MicroLink ISDN i Computer operational Switch on transmit MicroLink ISDN i clear to send Connection established LED lights up red for insecure or fax connections LED lights up green for secure connections

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Appendix

4.2 Technical data

Users with specific technical interests should refer to this chapter for detailed information on MicroLink ISDN i. All connections and their pin assignments are described in detail.

MicroLink ISDN i

Data transfer standards and protocols

Transf e r r a tes 38.400 – 64.000 bit/s

Transfer procedure Asynchronous

Error correction V.120 and X.75

Protocol recognition Automatic switching between X.75, V.120 and PPP

Command set Advanced AT command set

Operating surveillance 9 LEDs:

V.120, X.75, X:75T/70 NL, V.110, X.75-T-Online (VT-100, CEPT, KIT) (Germany) full-duplex

synchronous

S0 status S0 line Power TxD (transmit data) RxD (receive data) DTR (data terminal ready) RTS (request to send) CTS (clear to send) DCD (data carrier detect)

Computer interface V.24/RS-232

Line adapter Country-specific

ISDN connection DSS1 (Euro ISDN), basic rate interface (point-to

Line type DSS1 (Euro ISDN), Basic Rate Interface (point-to-

Power supply 9 – 30VAC, 9 – 30V

Power consumption 3.7 W

devolo MicroLink ISDN i

Automatic recognition: Bit rate: 300 – 230.40 bps asynchronous Data format:: 10/11 bit, parity: even/odd/none ((7E1 – 7O1 – 8N1))

multipoint connection), 1 TR6 (Germany) and ISDN PBX with S

multipoint connection), 1TR6 as well as ISDN PBXs with S

ports

port

DC*

Page 63

MicroLink ISDN i

Appendix

Security Integrated watchdog

Environment Temperature: 0..55°C, humidity 0..80%,

non-condensing

Operating systems Windows 98, Windows Me, Windows NT 4.0, Win-

dows 2000, Windows XP

CE conformity CE-compliant in accordance with R&TTE technical

requirements for all EU countries and Switzerland Tested in accordance with EN 55024, EN 55022, EN 60950, CTR3 A1

*The device can be supplied with direct current (DC). If power is put into the socket a potential difference of

0.7V between the DC source ground and the interface ground occurs (due to the rectifier diode). If these grounds are connected galvanically the electric current flows back via the interface ground—following the lowest resistance. Normally, this does not cause problems.

devolo MicroLink ISDN i

Page 64

Appendix

RJ11 socket contact assignments

S0 socket Line IAE

1 2 3 4 5 6

Mini-DIN 8 socket pin assignments

DIN Mini DIN 8

E1 E2 D1 D2 M1 M2 M3 M5 S1.1

Mini DIN 8

S1.2 S2

T+ R+ RT-

– U 5 3 6 1 4 7 – 8 2

2a 1a 1b 2b

Explanation (USA)

GND GND TxD RxD DSR CTS RI DCD – DTR RTS

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4.3 Declaration of conformity

KONFORMITÄTSERKLÄRUNG

gemäß dem Gesetz über Funkanlagen und Telekommunikationsendeinrichtungen

appropriate to the law of radio and telecom terminal equipment and Directive 1999/5/EC (R&TTE)

Die Firma: devolo AG

The Company:

erklärt, daß das Produkt: MicroLink

declares that the product:

(FTEG) und der Richtlinie 1999/5/EG (R&TTE)

EC- DECLARATION OF CONFORMITY

Sonnenweg 11 52070 Aachen

££££

ISDN i

Telekommunikations (TK-) Endeinrichtung

telecommunications terminal equipment radio equipment

Appendix

Verwendungszweck: ISDN-Adapter

intended purpose:

den grundlegenden Anforderungen des § 3 und den übrigen einschlägigen Bestimmungen

complies with the appropriate essential requirements of the FTEG (Article 3 of R&TTE) and the other relevant

Harmonisierte Normen: Gesundheit und Sicherheit gemäß §3 (1) 1. (Artikel 3 (1) a))

Harmonised Standards: Health and Safety requirements contained in §3 (1) 1. (Article 3 (1) a))

EN 60 950: 1992 +A1: 1993 +A2: 1993 +A3: 1995 +A4: 1996 +A11: 1998

Harmonisierte Normen: Schutzanforderungen in Bezug auf die EMV §3 (1) 2, Artikel 3

Harmonised Standards: Protection requirements with respect to EMC §3 (1) 2, (Article 3 (1) b))

Schnittstellenspezifikation:

Interface specification: Termination point of a public telecom. network

Spezifikation I-CRT 3: 1994

specification:

Diese Erklärung wird verantwortlich abgegeben durch:

This declaration is submitted by:

Aachen, 21. Januar 2003

Aachen, 21stJanuary 2003

des FTEG (Artikel 3 der R&TTE) entspricht.

provisions.

(1) b))

EN 55 022: 1998 +A1 : 2000

EN 55 024: 1998

Netzabschluss eines öffentlichen TK-Netzes

Heiko Harbers Vorstandsvorsitzender

CEO

devolo MicroLink ISDN i

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Appendix

4.4 Warranty conditions

The devolo AG warranty is given to purchasers of devolo products in addition to the warranty conditions provided by law and in accordance with the following conditions:

1 Warranty coverage

a) The warranty covers the equipment delivered and all its parts. Parts will, at devolo's sole

discretion, be replaced or repaired free of charge if, despite proven proper handling and ad herence to the operating instructions, these parts became defective due to fabrication and/or material defects. Alternatively, devolo reserves the right to replace the defective product with a comparable product with the same specifications and features. Operating manuals and possibly supplied software are excluded from the warranty.

b) Material and service charges shall be covered by devolo, but not shipping and handling

costs involved in transport from the buyer to the service station and/or to devolo. c) Replaced parts become property of devolos. d) devolo is authorized to carry out technical changes (e.g. firmware updates) beyond repair

and replacement of defective parts in order to bring the equipment up to the current tech

nical state. This does not result in any additional charge for the customer. A legal claim to

this service does not exist.

2 Warranty period

The warranty period for this devolo product is three years. This period begins at the day of delivery from the devolo dealer. Warranty services carried out by devolo do not result in an extension of the warranty period nor do they initiate a new warranty period. The warranty period for in stalled replacement parts ends with the warranty period of the device as a whole.

3 Warranty procedure

a) If defects appear during the warranty period, the warranty claims must be made immedi-

ately, at the latest within a period of 7 days. b) In the case of any externally visible damage arising from transport (e.g. damage to the hous-

ing), the person carrying out the transportation and the sender should be informed immedi-

ately. On discovery of damage which is not externally visible, the transport company and

the sender are to be immediately informed in writing, at the latest within 3 days of delivery. c) Transport to and from the location where the warranty claim is accepted and/or the repaired

device is exchanged, is at the purchaser's own risk and cost. d) Warranty claims are only valid if a copy of the original purchase receipt is returned with the

device. devolo reserves the right to require the submission of the original purchase receipt.

4 Suspension of the warranty

All warranty claims will be deemed invalid

a) if the label with the serial number has been removed from the device, b) if the device is damaged or destroyed as a result of acts of nature or by environmental in-

fluences (moisture, electric shock, dust, etc.), c) if the device was stored or operated under conditions not in compliance with the technical

specifications, d) if the damage occurred due to incorrect handling, especially to non-observance of the sys-

tem description and the operating instructions,

devolo MicroLink ISDN i

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Appendix

e) if the device was opened, repaired or modified by persons not contracted by devolo, f) if the device shows any kind of mechanical damage, g) if the warranty claim has not been reported in accordance with 3a) or 3b).

5 Operating mistakes

If it becomes apparent that the reported malfunction of the device has been caused by unsuitable hardware, software, installation or operation, devolo reserves the right to charge the purchaser for the resulting testing costs.

6 Additional regulations

a) The above conditions define the complete scope of devolo's legal liability. b) The warranty gives no entitlement to additional claims, such as any refund in full or in part.

Compensation claims, regardless of the legal basis, are excluded. This does not apply if e.g.

injury to persons or damage to private property are specifically covered by the product lia

bility law, or in cases of intentional act or culpable negligence. c) Claims for compensation of lost profits, indirect or consequential detriments, are excluded. d) devolo is not liable for lost data or retrieval of lost data in cases of slight and ordinary neg-

ligence. e) In the case that the intentional or culpable negligence of devolo employees has caused a

loss of data, devolo will be liable for those costs typical to the recovery of data where pe

riodic security data back-ups have been made. f) The warranty is valid only for the first purchaser and is not transferable. g) The court of jurisdiction is located in Aachen, Germany in the case that the purchaser is a

merchant. If the purchaser does not have a court of jurisdiction in the Federal Republic of

Germany or if he moves his domicile out of Germany after conclusion of the contract, devo

lo's court of jurisdiction applies. This is also applicable if the purchaser's domicile is not

known at the time of institution of proceedings. h) The law of the Federal Republic of Germany is applicable. The UN commercial law does not

apply to dealings between devolo and the purchaser.

devolo MicroLink ISDN i

Devolo MicroLlink User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual