i-modul Modem 144/56k 3.0 basic Designer's Guide

i-modul Modem 144/56k 3.0 basic Designer's Guide

Copyright July 12 INSYS MICROELECTRONICS GmbH Any duplication of this manual is prohibited. All rights on this documentation and the devices are with INSYS MICROELECTRONICS GmbH Regensburg. Trademarks The use of a trademark not shown below is not an indication that it is freely available for use. MNP is a registered trademark of Microcom Inc. IBM PC, AT, XT are registered trademarks of International Business Machine Corporation. INSYS, e-mobility LSG and e-mobility PLC are registered trademarks of INSYS MICROELECTRONICS GmbH. Windows is a registered trademark of Microsoft Corporation. Linux is a registered trademark of Linus Torvalds. Publisher: INSYS MICROELECTRONICS GmbH Hermann-Köhl-Str. 22 D-93049 Regensburg, Germany Phone: +49 941 58692 0 Fax: +49 941 58692 45 E-mail: info@insys-icom.com Internet: http://www.insys-icom.com Date: Jul-12 Item: 31-22-04.026 Version: 1.0 Language: EN

Content 1 Technical Data...6 1.1 Physical Features...6 1.2 Technological Features...7 2 Connections...8 2.1 PCB Layout...8 2.2 Pin Layout Terminal Strip P1...9 2.3 Pin Layout Terminal Strip P2...9 2.4 PIN specifications...10 2.4.1 Reset Input... 10 2.4.2 Indication Signals... 10 2.5 Connection Example for Serial Interface...11 3 Function Overview...12 4 Meaning of the Symbols and the Formatting in this Manual...13 5 Operating Principle...14 5.1 Operation with the Terminal Program...14 6 Functions...16 6.1 Automatic Baud Rate Detection...16 6.1.1 Serial Connection... 16 6.1.2 Phone connection... 17 6.2 Data Buffer for Serial Data Transmission...17 6.3 Bit Direct Mode...18 6.4 Data Flow Control (Handshake)...18 6.4.1 Hardware data flow control (RTS/CTS)... 18 6.4.2 Software data flow control (XON/XOFF)... 19 6.5 Error Correction...20 6.6 Data Compression...21 6.7 Automatic Dial-Up Delay...22 6.8 User Profiles...22 6.8.1 Changing the Configuration... 22 6.8.2 Saving the Configuration... 23 6.9 Reset...23 7 Maintenance...24 8 AT Command Reference...27 8.1 AT Command Overview...28 8.2 AT Messages...43 9 S Registry...47 9.1 Overview S Registry...48 9.2 Description S Registry...49 4 Jul-12

Contents 10 CE/EMC Compliant Integration...57 10.1 Your Application...57 10.2 Application Interface / Terminal Strip P1...57 10.3 Network Interface / Terminal Strip P2 (for Modem /ISDN)...57 10.4 Antenna Connection (if equipped)...58 10.5 Further Recommendations...58 10.6 Reference Documents...58 11 Declaration of Conformity...59 12 Tables and Diagrams...60 12.1 List of Tables...60 12.2 List of Diagrams...60 13 Index...61 Jul-12 5

Technical Data i-modul Modem 144/56k 1 Technical Data 1.1 Physical Features All specified data was measured with nominal input voltage, at full load, and an ambient temperature of 25 C. The limit value tolerances are subject to the usual variations. Physical Feature Operation voltage V CC Input voltage (TTL) Output voltage (TTL) Total current consumption in idle Total current consumption in active state Total maximum current consumption Total current consumption in sleep mode Weight Value +5 V (± 5 %) DC or optional HW version for +3.3 V (± 5 %) DC V IL < 0.8 V V IH > 2 V (max. V CC ) V OL < 0.4 V V OH > 2.4 V (3.3 V CMOS compatible) approx. 150 ma approx. 160 ma approx. 400 ma approx. 50 ma approx. 32 g Dimensions (Length x Width x Height) 56.4 mm x 56.4 mm x 14,6 mm Height of the terminal strip above PCB PCB thickness 6.5 mm 1.6 mm Temperature range 0 C 70 C Maximum permissible humidity Table 1: Physical Features 95% non-condensing 6

i-modul Modem 144/56k Technical Data 1.2 Technological Features Technological Feature Supported data compression standards Description Fax class Fax Class 1 Modulation types Error correction standards Table 2: Technological Features MNP 2/3, MNP 5, V.42 bis; V.44, MNP 10, MNP 10 EC Bell Norm 103/212, V.32bis, V.32, V.23, V.22, V22 bis, V21, (for 56k version additionally V.34+, V.34, V.90 and V.92) V.42, MNP4, LAPM 7

Connections i-modul Modem 144/56k 2 Connections 2.1 PCB Layout P2 P1 Figure 1: PCB layout, terminal strip and fixing hole position Item Type Description P1 SAMTEC TW series 2-row Serial interface, inputs and outputs 2 mm pitch or Fischer SLY 81 24 Z P2 SAMTEC TW series 2-row 2 mm pitch or Plastron PQFZ-06S-VK-024 or Fischer SLY 6 Phone network interface Table 3: Specification and assignment of the terminal strips 8

i-modul Modem 144/56k Connections 2.2 Pin Layout Terminal Strip P1 Pin Type Signal Description 1 GND Ground of supply voltage (ground) 2 Supply VCC 5 V DC supply voltage (or 3,3 V) 3 GND Ground of supply voltage (ground) 4 Input TXD Terminal transmit signal of RS232 line; TTL level 5 GND Ground of supply voltage (ground) 6 Output RXD Receive signal of RS232 line; TTL level 7 Output ID-PIN2 Ground 8 Input RTS~ Request to Send; TTL level (RS232 signal) 9 Output ID-PIN1 GND 10 Output CTS~ Clear To Send; TTL level (RS232 signal) 11 Input RESET~ RESET, TTL level, t min = 0.1 s 12 Input DTR~ Data Terminal Ready; TTL level (RS232 signal) 13 Output OH~ Off Hook 14 Output DCD~ Data Carrier Detect; TTL level (RS232 signal) 15 Output RI~ Ring Signal TTL level (RS232 signal) 16 Output DSR~ Data Set Ready; TTL level (RS232 signal) 17 Internal connection, do not use 18 Internal connection, do not use 19 Internal connection, do not use 20 Internal connection, do not use 21 GND Ground 22 Internal connection, do not use 23 Internal connection, do not use 24 GND Ground Table 4: Terminal strip connections description, terminal strip P1 The tilde "~" behind the signal description indicates that this signal is "low active". 2.3 Pin Layout Terminal Strip P2 Pin Signal Description 1 Phone signal b1 Outgoing phone line (exchange line or PABX) 2 Phone signal b2 Telephone connected in series 3 Phone signal a1 Incoming phone line (exchange line or PABX) 4 Phone signal a2 Telephone connected in series 5 External bell W Not connected 6 Earth E Not connected Table 5: Terminal strip connections description, terminal strip P2 9

Connections i-modul Modem 144/56k 2.4 PIN specifications All following specifications are based on a supply voltage of V CC = 5 V ± 5%. High = V IH ; Low = V IL (refer to Technical Data). 2.4.1 Reset Input Pin Signal Type Description 11 Reset~ Input Normal state: 1 (internal pull-up resistor) Reset: 0 (against GND) A minimum time of 0.1 s for activation is recommended to trigger the reset safely. Table 6: PIN specifications - reset input 2.4.2 Indication Signals Pin Signal Type Description 13 OH~ Output This output indicates Off-Hook of the modem. Signaling: Normal state: High (hung up) Off-Hook: Low (off-hook) 15 RI~ Output The ring indicator indicates an incoming connection attempt. Signaling: Normal state: Ring: Table 7: PIN specifications - indication signals High Low Figure 2: Connection example of the OH signal 10

i-modul Modem 144/56k Connections 2.5 Connection Example for Serial Interface The following example is only valid for a power supply with V CC = 5 V. Figure 3: Connection example of the serial interface (5 V VCC) 11

Function Overview i-modul Modem 144/56k 3 Function Overview The i-modul Modem 144/56k 3.0 basic provides you with the following functions: Automatic Baud Rate Detection The i-modul Modem 144/56k 3.0 basic will automatically adjust the data transmission rate, if a connection is made via its serial interface. The serial transmission rate can be preset for applications for the serial communication to be able to initialize with a defined baud rate. Data buffering for serial data transmission The i-modul Modem 144/56k 3.0 basic provides rapid send and receive buffers to adjust the modem to the data processing speed of the application. Bit direct mode The i-modul Modem 144/56k 3.0 basic can forward incoming data without having any influence on their transmission format. Hardware and software data flow control The i-modul Modem 144/56k 3.0 basic can signal the application via the control lines of the serial interface to interrupt the data flow, if the buffers of the i-modul Modem 144/56k 3.0 basic exceed a certain level. An application can also prompt the i-modul Modem 144/56k 3.0 basic via a control line to interrupt the data flow. As an alternative, the i-modul Modem 144/56k 3.0 basic can control the data flow via XOFF/XON characters in the data stream. Error correction / data compression The i-modul Modem 144/56k 3.0 basic provides the following error correction and compression protocols: V.42, V.42bis, V.44, MNP2, MNP3, MNP4 and MNP10 Storing the settings in the user profiles The i-modul Modem 144/56k 3.0 basic can store the user settings in two different "profiles". This means that two different configurations can be stored for special purposes and loaded as needed. 12

i-modul Modem 144/56k Meaning of the Symbols and the Formatting in this l 4 Meaning of the Symbols and the Formatting in this Manual This section describes the definition, formatting and symbols used in this manual. The various symbols are meant to help you read and find the information relevant to you. The following text is structured like a typical operating instruction of this manual. Bold print: This will tell you what the following steps will result in After that, there will be a detailed explanation why you could perform the following steps to be able to reach the objective indicated first. You can decide whether the section is relevant for you or not. An arrow will indicate prerequisites which must be fulfilled to be able to process the subsequent steps in a meaningful way. You will also learn which software or which equipment you will need. 1. One individual action step: This tells you what you need to do at this point. The steps are numbered for better orientation. A result which you will receive after performing a step will be marked with a check mark. At this point, you can check if the previous steps were successful. Additional information which you should consider are marked with a circled "i". At this point, we will indicate possible error sources and tell you how to avoid them. Alternative results and steps are marked with an arrow. This will tell you how to reach the same results performing different steps, or what you could do if you didn't reach the expected results at this point. 13

Operating Principle i-modul Modem 144/56k 5 Operating Principle This chapter describes the basic procedures to operate and configure an i-modul Modem 144/56k 3.0 basic. In general, the i-modul Modem 144/56k 3.0 basic is configured and operated via AT commands. You can enter these commands yourself with the help of a terminal program and the AT command reference. 5.1 Operation with the Terminal Program In general, any terminal program can be used. We recommend the program TeraTerm by T. Teranishi under Windows. It is available free of cost on the Internet at http://hp.vector.co.jp/authors/va002416/teraterm.html. You can use the program "minicom" if you work in a Linux environment. Caution! Damage of the serial interface! A possible direct connection of the serial interface of the i- modul Modem 144/56k 3.0 basic with a typical RS232 interface of a PC overloads components of the module due to the higher voltage levels. Use an RS232 level converter (e.g. MAX232) to adjust both interface types correctly. Configuring and operating the i-modul Modem 144/56k 3.0 basic with a terminal program How to configure and operate the i-modul Modem 144/56k 3.0 basic with a terminal program. The i-modul Modem 144/56k 3.0 basic is connected to the PC and supplied with power. A terminal program is installed on the PC. 1. Start your terminal program. 2. Select the serial port, to which your i-modul Modem 144/56k 3.0 basic is connected. COM1 under Windows corresponds to /dev/ttys0 under Linux. 3. Type the character string AT into the terminal program. Complete the entry by pressing the Enter key. Each command input starts with AT and is completed with the Enter key. 14

i-modul Modem 144/56k Operating Principle The i-modul Modem 144/56k 3.0 basic replies with OK. If the i-modul Modem 144/56k 3.0 basic does not respond, this may have three probable reasons: a) the i-modul Modem 144/56k 3.0 basic is switched off or b) the i-modul Modem 144/56k 3.0 basic is not in configuration mode or c) the i-modul Modem 144/56k 3.0 basic is connected to another serial port. Check it and repeat step 3. 4. Configure the i-modul Modem 144/56k 3.0 basic using AT commands. A reference of the AT commands can be found in the chapter "AT Command Reference". 5. Save your entries with AT&W. Not all configurations at the i-modul Modem 144/56k 3.0 basic need to be saved actively by entering AT&W. Some settings are automatically saved immediately. We still recommend sending the command AT&W to the i-modul Modem 144/56k 3.0 basic as your last configuration step to ensure that all settings are stored safely and are available for the next restart. 15

Functions i-modul Modem 144/56k 6 Functions 6.1 Automatic Baud Rate Detection 6.1.1 Serial Connection The automatic baud rate detection enables a continuous automatic adjustment of all parameters (baud rate, data format) of the serial interface at the i-modul Modem 144/56k 3.0 basic. The device will detect during the operation, which baud rate and which data format is applied to the serial interface. After a restart, the i-modul Modem 144/56k 3.0 basic will restore the last working interface configuration. With each incoming AT command (according to the character string "AT"), the parameters for the interface of the i-modul Modem 144/56k 3.0 basic will be checked and adjusted, if necessary. This is the reason why the baud rate can not be stored with the command AT&W, as the i-modul Modem 144/56k 3.0 basic will immediately adjust its interface to the current parameters of the currently established serial connection. The function is active as default. Configuration with AT commands To set the baud rates temporarily (until the next "AT"), enter one of the following baud rates for <n>: 300, 600, 1200, 2400, 4800, 9600, 14400, 19200, 28800, 38400, 57600 or 115200 bps. AT+IPR=<n> This setting can not be stored. The i-modul Modem 144/56k 3.0 basic must be configured with the baud rate, which is used to operate the application at a later time, as the i- modul Modem 144/56k 3.0 basic will always use the last known functioning configuration of its interface. 16

i-modul Modem 144/56k Functions 6.1.2 Phone connection The automatic negotiation of the baud rate and the modulation standard enables the i-modul Modem 144/56k 3.0 basic to negotiate the largest possible connection speed to the remote terminal while the connection is established. The speed depends on the settings and the abilities of the modem at the remote terminal. Via the modulation standard, the connection speed can be set through the phone line. If nothing is defined, the i-modul Modem 144/56k 3.0 basic will automatically try to determine the optimum connection parameters. The function is active as default. Configuration with AT commands To configure the modulation standard and thus the connection speed, use the command: AT+MS=<modulation> Please find the possible parameters for this command in the Chapter "AT Command reference". To display the current settings: For a list of possible parameter of the command, enter: AT+MS? AT+MS=? 6.2 Data Buffer for Serial Data Transmission The i-modul Modem 144/56k 3.0 basic provides send and receive buffers. These buffers prevent the loss of data, in case the application or the remote terminal can not receive data at this time. The data buffer can be deactivated together with the error correction (bit direct mode). When the buffer is activated, the data flow control should be active to avoid a buffer overflow in the i-modul Modem 144/56k 3.0 basic. If the buffer overflows, the data gets lost. Operation without a buffer and error correction is only useful for special character framings. The function is active as default. Configuration with AT commands To deactivate the error correction as well as the buffer in the i-modul Modem 144/56k 3.0 basic for applications with special data format, use the command: To deactivate only the error correction, use the command: AT\N1 AT\N0 17

Functions i-modul Modem 144/56k 6.3 Bit Direct Mode For special applications, the buffering of the i-modul Modem 144/56k 3.0 basic can be deactivated using the setting "unbuffered, bit direct". All data is forwarded without buffering and further influence of the i-modul Modem 144/56k 3.0 basic. This applies especially to the parity and stop bits. The error correction and the data compression are in this case switched off as well. If the i-modul Modem 144/56k 3.0 basic is operated in this mode, not all functions will be available. The remote configuration and all functions for which a password is required, will no longer be available. This mode should only be used for special character framings. Configuration with AT commands To deactivate the buffer of the i-modul Modem 144/56k 3.0 basic and to switch on the bit direct mode, use the command: AT\N1 6.4 Data Flow Control (Handshake) The data flow control ensures that the data transfer is interrupted as soon as the modem buffer exceeds a certain level. Two data flow control options are available: Via the control lines RTS and CTS, or via the control characters XON/XOFF which are inserted into the data stream. 6.4.1 Hardware data flow control (RTS/CTS) The hardware data flow control works in two directions. When the critical buffer level is exceeded, the modem will set the CTS line to "low" and will thus indicate to the application to interrupt the dataflow. When the buffer is emptied sufficiently for the i-modul Modem 144/56k 3.0 basic to be able to receive data again, the CTS line is set to "high". Reversely, the application can also indicate to the i-modul Modem 144/56k 3.0 basic to interrupt the data flow. This is done via the RTS line. If it is set to "low", the modem will interrupt the data flow to the application. The application will set it to "high" to request data from the i-modul Modem 144/56k 3.0 basic. The data flow control with RTS/CTS behavior is active by default. Configuration with AT commands To switch the data flow control on and to set the type to RTS/CTS, use: To switch the data flow control off, use: AT&K3 AT&K0 18

i-modul Modem 144/56k Functions 6.4.2 Software data flow control (XON/XOFF) When the input buffer of the modem exceeds a certain fill state, the modem will insert an XOFF character into the data stream to the application. This character will cause the application to send no more data. It will depend on the according application software if the XON/XOFF data flow control is supported. After the input buffer of the modem is emptied so much that data can be received again, the modem will send an XON character to the application. This character will cause the application to send data to the modem again. Analogously, the application can insert XON/XOFF characters into the data stream to switch the data flow on and off. The XON/XOFF data flow control is only available when the transmitted data do not contain the characters XON or XOFF, which usually appear only in actual ASCII texts (7 bit). When binary data (programs, etc.) are transmitted, or in the XMODEM transmission protocol, for example, occasionally appearing XON or XOFF characters would disturb the operation. Configuration with AT commands To switch the data flow control on and to set the type to XON/XOFF, use: To switch the data flow control off, use: AT&K4 AT&K0 19

Functions i-modul Modem 144/56k 6.5 Error Correction The i-modul Modem 144/56k 3.0 basic masters the V.42 error correction protocol including the Microcom Networking Protocol Levels 2/3/4 (MNP2, MNP3, MNP4) and the data throughput optimization MNP10. The V.42 error correction includes the protocols LAPM (Link Access Procedure for Modem) and MNP4. LAPM is the preferred error correction. MNP 4 is supported to maintain the compatibility with other MNP modems. Both methods determine frames to transfer net data and use CRC (Cyclic Redundancy Check) check sums for error tests. In V.42, there is the option to have the modem identify if the partner is a V.42 modem, a MNP modem, or a modem without error correction. The modem can then autonomously adjust to the partner. As default, the automatic selection of V.42LAPM or MNP4 or no correction is set. Configuration with AT commands To define the type of error correction, use the command: To set V.42LAP-M or MNP4 error correction exclusively, use: Use the following command for the i-modul Modem 144/56k 3.0 basic to automatically select V.42LAP-M, MNP4, or an errorcorrected connection: To set V.42LAP-M error correction exclusively, use: For the buffered mode without error correction, use: AT\N<n> AT\N2 AT\N3 AT\N4 AT\N0 20

i-modul Modem 144/56k Functions 6.6 Data Compression The i-modul Modem 144/56k 3.0 basic supports various data compression types. During the connection setup, it will automatically detect the type of data compression used by the remote terminal, or it is set to a certain type of data compression. Data compression is only available for error corrected connections. To be able to use data compression, both sides (sender and recipient) must be able to at least recognize and support the same data compression mode. The default setting is the automatic selection of MNP5 and V42.bis and V.44 data compression (AT%C3). Configuration with AT commands To select the compression type, use: To completely switch off the compression, use the following commands: To select the MNP4 compression: To select the V42bis and V.44 data compression if they are switched on (see below): To select the V42bis and MNP5 data compression if V42.bis compression is switched on (see below): To switch on V.42bis compression: To switch on V.44 compression: To switch off V.42bis compression: To switch off V.44 compression: AT%C<n> AT%C0 AT+DS44=0 AT%C1 AT%C2 AT%C3 AT%C2 AT+DS44=3 AT%C0 AT+DS44=0 21

Functions i-modul Modem 144/56k 6.7 Automatic Dial-Up Delay The standard TBR21 applies to all public phone networks in EC countries (Belgium, Denmark, German, Finland, France, Greece, Great Britain, Ireland, Italy, Luxembourg, Netherlands, Austria, Portugal, Sweden, Spain), as well as in Switzerland, Liechtenstein, Norway and Iceland. According to the regulations of the TBR 21, a dial-up is blocked for 2 hours after 12 unsuccessful dial-up attempts. In this case, the modem indicates the message BLACKLISTED. The modem must be briefly disconnected from the power supply in this case. The counter will be reset automatically following each successful connection establishment. If the connection to the remote terminal has been established successful, a dialling pause of 5 seconds will be maintained. 6.8 User Profiles 6.8.1 Changing the Configuration The i-modul Modem 144/56k 3.0 basic knows different user profiles. Besides the default factory settings, which serve for achieving a defined, operable initial condition of the modem, the user profiles 0 and 1 are available. You can save configurations to the user profiles, which are reused for certain purposes. A part of the S registry is saved with each profile. The concerned registers are indicated in the S registry description with an asterisk "*". A reset is always performed before loading a user profile. Configuration with AT commands In order to load the factory default settings into the i-modul Modem 144/56k 3.0 basic, use the command In order to load user profile 0 into the i- modul Modem 144/56k 3.0 basic, use the command In order to load user profile 1 into the i- modul Modem 144/56k 3.0 basic, use the command In order to display the user profile settings, use the command AT&F ATZ ATZ0 ATZ1 AT&V 22

i-modul Modem 144/56k Functions 6.8.2 Saving the Configuration If the configuration of the i-modul Modem 144/56k 3.0 basic has been adapted to the requirements of the user, it is possible to save the settings in user profile 0 or 1. Changes of the configuration get lost after a RESET or restart, if the have not been saved before. Configuration with AT commands In order to save the current configuration to user profile 0, use the command In order to save the current configuration to user profile 1, use the command AT&W AT&W0 AT&W1 6.9 Reset There are several methods to reset the i-modul Modem 144/56k 3.0 basic: by cutting off the supply voltage, by connecting the terminal RESET with the terminal GND, and by using an AT command. Configuration with AT commands To reset the i-modul Modem 144/56k 3.0 basic, use the command To reset the i-modul Modem 144/56k 3.0 basic and load the settings stored in user profile 0, use the command To reset the i-modul Modem 144/56k 3.0 basic and load the settings stored in user profile 1, use the command To reset the i-modul Modem 144/56k 3.0 basic to factory defaults, use the command ATZ ATZ0 ATZ1 AT&F&WZ 23

Maintenance i-modul Modem 144/56k 7 Maintenance Firmware Update Note Function loss due to faulty update! The i-modul Modem 144/56k 3.0 basic may loose its function, if it is updated with a wrong firmware or if the transfer of the firmware was faulty. Before updating the firmware of the i-modul Modem 144/56k 3.0 basic, contact the INSYS MICROELECTRONICS support department. They will provide you with the suitable firmware version for your i-modul Modem 144/56k 3.0 basic. Note Damage of the serial interface! A possible direct connection of the serial interface of the i- modul Modem 144/56k 3.0 basic with a typical RS232 interface of a PC overloads components of the module due to the higher voltage levels. Use a level converter (e.g. MAX232) to adjust both interface types correctly. The firmware of the i-modul Modem 144/56k 3.0 basic can be updated to add further functions to the i-modul Modem 144/56k 3.0 basic or to improve the existing functions. A firmware update can be performed with the help of a terminal program that supports ASCII uploads (e.g. TeraTerm). Firmware update with a terminal program How to load new firmware to the i-modul Modem 144/56k 3.0 basic. You will need a terminal program that supports ASCII file transfers, such as TeraTerm. You will need the appropriate firmware for your i-modul Modem 144/56k 3.0 basic. The i-modul Modem 144/56k 3.0 basic is connected to the PC. 1. Start your terminal program. 2. Activate hardware handshake in the terminal program. 24 3. Open the serial interface, to which the i-modul Modem 144/56k 3.0

i-modul Modem 144/56k Maintenance basic is connected. 4. Set the baud rate in the terminal program to 57600 baud. 5. Type in "AT" and confirm with "Enter". The i-modul Modem 144/56k 3.0 basic replies withok. If the i-modul Modem 144/56k 3.0 basic does not respond, check the connection and if the device receives power at all. Continue with step 2. The firmware upload can not function without the hardware handshake. The input buffer at the serial interface of the i-modul Modem 144/56k 3.0 basic overflows and the i-modul Modem 144/56k 3.0 basic resets itself. In this case, you will hear the relays click during the uploads. It is possible that an error message is displayed. Before you start with the upload, ensure that no other programs are active on your system, which could interrupt the data flow at the serial interface. Opening a DVD drive, playing music or connecting a USB device can also disturb or interrupt the data flow. As a result, the i- modul Modem 144/56k 3.0 basic may fail to function, and only INSYS MICROELECTRONICS will be able to restore it. 6. Enter AT** to start the firmware upload. The modem reports "Download initiated.." 7. Use the terminal program to send the file with the firmware loader, such as "P9_02-16.S37". If you do not send a firmware file, the i-modul Modem 144/56k 3.0 basic will terminate the procedure after approx. 60 seconds. The upload progress is displayed by dots in the terminal window. The i-modul Modem 144/56k 3.0 basic indicates the successful upload of the firmware with e.g.: Upload NV_Ram Data If you didn't receive the previous message for a successful upload, the upload has most probably failed. Try to reset the i-modul Modem 144/56k 3.0 basic and to repeat the process from step 4. If this fails and the i-modul Modem 144/56k 3.0 basic does no longer react to AT commands, please contact the INSYS MICROELECTRONICS support department. 25

Maintenance i-modul Modem 144/56k 8. Use the terminal program to send the file with the firmware, such as "20B7.S37". The upload progress is again displayed by dots in the terminal window. The i-modul Modem 144/56k 3.0 basic indicates after successful upload Device successfully programmed The i-modul Modem 144/56k 3.0 basic will reset itself and is ready for operation. 26

i-modul Modem 144/56k AT Command Reference 8 AT Command Reference Each AT command starts with the letters AT and ends with a carriage return (CR). Both, upper and lower case letters are accepted; however, the leading letters must either be AT or at. The command line will be evaluated as soon as the modem has received a carriage return. A parameter, which is indicated with the letter <n> in the description, means that it can be adjusted. For example ATL<n>, where <n> can take on the values 0 to 3, thus e.g. ATL2 (medium volume). The modem uses always the parameter 0 for commands, which expect a parameter, but are specified without a parameter. The commands ATZ and ATZ0, for example, show the same effect. The factory default settings are indicated with "(default)". The standard end character is "Carriage Return" (0Dh) or also known as "<CR>". No "Carriage Return" must be entered after entering "+++". The commands are acknowledged with OK or ERROR. A command being processed will be interrupted with every further incoming character. Therefore, you must wait for the acknowledgement before entering the next command, because otherwise the current command will be deleted. 27

AT Command Reference i-modul Modem 144/56k 8.1 AT Command Overview Command AT** ATA Description Start of the flash load function Answer mode The i-modul Modem 144/56k 3.0 basic changes to answer mode. It is only effective in Germany, if the telephone connected in series is off-hook or a call comes in. A/ Repeat the last command The last command entered will be repeated. AT\B<n> Send "break" to the other i-modul Modem 144/56k 3.0 basic In case of non-error-corrected connections, the i-modul Modem 144/56k 3.0 basic sends a break signal to the other i-modul Modem 144/56k 3.0 basic. The length of the signal is: the specified parameter times 1/10 of a second. For error-corrected connections, the i-modul Modem 144/56k 3.0 basic sends a break signal according to the active error correction protocol without considering a parameter specification. If no connection is established or if a fax connection is active, an error message is displayed. AT\B1 AT\B2 AT\B3 AT\B4 AT\B5 AT\B6 AT\B7 AT\B8 AT\B9 1/10 second break signal 2/10 seconds break signal 3/10 seconds break signal 4/10 seconds break signal 5/10 seconds break signal 6/10 seconds break signal 7/10 seconds break signal 8/10 seconds break signal 9/10 seconds break signal AT%C<n> Enabling the data compression Enable/disable a data compression type The i-modul Modem 144/56k 3.0 basic can only perform data compression with error-corrected connections. AT%C0 AT%C1 AT%C2 AT%C3 No data compression enabled MNP 5 data compression enabled V.42bis and V.44 data compression enabled MNP 5 and V.42bis data compression enabled (default) 28

i-modul Modem 144/56k AT Command Reference Command AT&C<n> Description DCD (CT109) behaviour Behaviour of the RS232 DCD output of the i-modul Modem 144/56k 3.0 basic. AT&C0 AT&C1 DCD is always ON DCD follows the carrier signal on the phone line (default) ATD<n> Dialling The i-modul Modem 144/56k 3.0 basic goes off-hook and dials according to the dialling string handed over with the ATD command. After dialling, the i-modul Modem 144/56k 3.0 basic tries to establish a connection. If the ATD command has been executed without a dialling string, the i-modul Modem 144/56k 3.0 basic goes off-hook and tries to establish a connection to the other i-modul Modem 144/56k 3.0 basic (without dialling). The behaviour of the i-modul Modem 144/56k 3.0 basic depends on the activation of the line current detection (refer to ATX command). The execution of the ATD command also depends on the time when the last dialling attempt was performed. The i-modul Modem 144/56k 3.0 basic behaves like a data modem in the mode AT+FCLASS=0. It attempts to connect to another data modem. This attempt is repeated until the waiting period that was specified in the S7 registry has expired. If this time is exceeded, the i-modul Modem 144/56k 3.0 basic hangs up and displays the error message: NO CARRIER. The i-modul Modem 144/56k 3.0 basic behaves like a fax modem in the mode FCLASS=1 or =2. It attempts to connect to another fax or fax modem. (The i- modul Modem 144/56k 3.0 basic goes into receive status HDLC V.21 channel 2, as if the command AT+FRH has been executed). The following characters may be transmitted as parameters (brackets, punctuation marks, spaces and semicolons are ignored): 0 to 9 The digits from 0 to 9 * The asterisk: only for tone dialling # The hash: only for tone dialling A-D P T The tone dialling characters A, B, C, D Pulse dialing mandatory: Pulse or tone dialing is required according to the region. Tone dialing mandatory: Pulse or tone dialing is required according to the region. 29

AT Command Reference i-modul Modem 144/56k Command ATD<n> (Continuation) Description W @ Wait for dialing tone: The i-modul Modem 144/56k 3.0 basic waits for the dialling tone before it starts to dial. If no dialling tone was detected within the period specified in the S6 registry, the i-modul Modem 144/56k 3.0 basic hangs up and an error message is displayed. Wait for silence: The i-modul Modem 144/56k 3.0 basic waits at least five seconds for silence in the line, before it executes the next character from the parameter string. If this five second silence can not be detected and the abort period in the S7 registry has not been exceeded, the i-modul Modem 144/56k 3.0 basic terminates the connection displaying the message: NO ANSWER. If busy tone detection is enabled, the i-modul Modem 144/56k 3.0 basic the dialup indicating the message: BUSY. If a response tone from the other i-modul Modem 144/56k 3.0 basic is received during the waiting period, a connection is established. Dial tone delay: The i-modul Modem 144/56k 3.0 basic performs a dial tone delay before it executes the next character of the parameter string. The delay length is defined in the S8 registry. L Last number re-dialling. ; Return to the input mode after dialling. It is added to the end of the dialling string and causes the i-modul Modem 144/56k 3.0 basic to return to the entry mode when it reaches ";" (with: OK message). This enables the input of AT commands even with a receiver offhook. The additional AT commands can follow in the same input line after the ";" or they can be transmitted to further input lines. The ATH command will abort the connection and the receiver is hung up. S=n Dialling the n-th number from the number pool, which was set up with the AT&Z<n> command.! Flash If the character! is a part of the dialling string, the i- modul Modem 144/56k 3.0 basic will hang up within the time frame determined in S29 and then goes off-hook again. ^ ATD12345; Suppresses the sending of a ringing tone. The semicolon (;) causes the return to the input mode after dialling. 30

i-modul Modem 144/56k AT Command Reference Command ATD<n> (Continuation) Description Default: Ringing tone is sent for fax operation. No ringing tone for data operation. ( ) Are ignored: They are just used as an outline. - Are ignored: They are just used as an outline. Space characters are ignored: They are just used as an outline. Examples: ATD12345 Dial the phone number 12345 ATDP12345 ATDT12345 Dial the phone number 12345 with the pulse dialling method Dial the phone number 12345 with the tone dialling method ATX3D0W12345 For PBXs, which connect to the exchange line using the prefix 0 (or 9): First, blind dialing is activated by: X3 (refer to the ATX3 command) to be able to dial a leading 0 without hearing a dialling tone. After 0 has been dialled via: D0, dialling tone recognition can be switched on again using the parameter: W. The i-modul Modem 144/56k 3.0 basic thus waits for the dialling tone and continues with the rest of the dial-up (via: 12345) only after hearing the dialling tone. Waiting for the dialling tone may be omitted. In this case, the dialling command is ATX3D012345. AT&D<n> DTR (CT108/2) Behaviour DTR (CT108/2) behaviour Monitoring on/off transitions of the RS232 DTR line of the PC. AT&D0 DTR is ignored. Allows the operation with PCs which do not operate DTR. AT&D1 A DTR on/off transition causes the i-modul Modem 144/56k 3.0 basic to react as if it had received an escape sequence +++. The i- modul Modem 144/56k 3.0 basic changes to input mode without hanging up. AT&D2 A DTR on/off transition causes the i-modul Modem 144/56k 3.0 basic to hang up. Going off-hook automatically is not possible. (default) AT&D3 A DTR on/off transition causes the i-modul Modem 144/56k 3.0 basic to perform a reset as if an ATZ command has been executed. A preceded AT&Y command decides if either the default 0 or 1 is loaded. AT+DS=<n> Enable/disable V.42bis data compression AT+DS=0 Disables V.42bis data compression AT+DS=3 Enables V.42bis data compression (default) 31

AT Command Reference i-modul Modem 144/56k Command AT+DS44=<n> Description Enable/disable V.44 data compression AT+DS44=0 AT+DS44=3 Disables V.44 data compression Enables V.44 data compression (default) ATE<n> Command input echo This command toggles the responses, which are created by the i-modul Modem 144/56k 3.0 basic as reaction on application commands (Echo), ON or OFF. ATE0 ATE1 Disabling echo Enabling echo (default) AT%E<n> Automatic retrain The i-modul Modem 144/56k 3.0 basic performs a retrain in case of transmission problems. The i-modul Modem 144/56k 3.0 basic hangs up after three insuccessful retrain attempts. AT%E0 AT%E1 AT%E2 Retrain not allowed Retrain allowed Fall back, fall forward allowed (default) AT&F Loading the factory default settings The i-modul Modem 144/56k 3.0 basic loads the factory default settings from the internal non-volatile memory. With this, the i-modul Modem 144/56k 3.0 basic can be taken into a defined initial state. AT&F also overwrites a part of the S registry. The i-modul Modem 144/56k 3.0 basic has two factory default settings (AT&F0, AT&F1). AT+GCI Configuring the country code The command AT+GCI allows the customization of the modem for different countries. By default, the modem is configured to Europe (CTR21) with AT+GCI=FD. The modem is only approved for this country profile at the moment. Note: Please note that all country settings will result in ALL modem settings being reset to the default settings (such as AT&F&W). Therefore, please select a country profile first and adjust the settings afterwards. ATH Terminating a connection The i-modul Modem 144/56k 3.0 basic terminates the connection. 32

i-modul Modem 144/56k AT Command Reference Command ATI<n> Description Identification The i-modul Modem 144/56k 3.0 basic sends an identification to the PC, according to the parameter. ATI0 ATI1 ATI2 ATI3 ATI4 Product code Previously calculated checksum of the EPROM Calculation of the EPROM checksum and comparison with the previously calculated checksum stored in the EPROM. Display of OK for correct comparison. Version number of the firmware in the EPROM i-modul Modem 144/56k 3.0 basic version number ATI5 Country code parameter (Germany = 006/Europe = 253) ATI6 Version number and revision of the data pump AT+IPR=<n> Determine baud rate Use the command AT+IPR to temporarily set a certain baud rate. AT+IPR=0 Enables the automatic baud rate detection (default) AT+IPR=<n> Sets the i-modul Modem 144/56k 3.0 basic temporarily to the fixed baud rate <n>. The following baud rates are supported: 300, 1.200, 2.400, 4.800, 9.600, 19.200, 38.400, 57.600, 115.200 and 230400. The setting AT+IPR is not stored with AT&W. AT&K<n> Selecting data flow control between PC and i-modul Modem 144/56k 3.0 basic (handshake) Fax operation default is RTS/CTS. AT&K0 AT&K3 AT&K4 AT&K5 AT&K6 No data flow control Select data flow control RTS/CTS (default) Select data flow control XON/XOFF Select transparent data flow control XON/XOFF Select RTS/CTS and XON/XOFF data flow control AT\K Break control The i-modul Modem 144/56k 3.0 basic reacts to a break (receive path OFF for a certain amount of time), which it receives from another modem or from the PC, or from the command AT\B according to the parameters. 1. Situation In case of a break by the application during a data connection to another modem: AT\K0 AT\K1 AT\K2 i-modul Modem 144/56k 3.0 basic changes to command mode, sends no break to another modem i-modul Modem 144/56k 3.0 basic deletes the data buffer, sends break to another modem Like AT\K1 33

AT Command Reference i-modul Modem 144/56k Command AT\K (Continuation) Description AT\K3 AT\K4 AT\K5 i-modul Modem 144/56k 3.0 basic sends break immediately to another modem, data buffers are not deleted Like AT\K0 i-modul Modem 144/56k 3.0 basic inserts a break into the data transmitted to the other modem 2. Situation The i-modul Modem 144/56k 3.0 basic has been changed to command mode during a data connection via an escape sequence +++. In this condition, the AT\B command will send a break to the other modem. In this situation, the parameter n will cause the following: AT\K0 AT\K1 AT\K2 AT\K3 AT\K4 AT\K5 i-modul Modem 144/56k 3.0 basic deletes the data buffer, sends break to another modem Like AT\K0 i-modul Modem 144/56k 3.0 basic sends break immediately to the other modem Like AT\K2 i-modul Modem 144/56k 3.0 basic inserts a break into the data transmitted to the other modem Like AT\K4 Return from the online command mode into the data mode via the ATO command. 3. Situation In the case a break is received from another modem during a connection that has not been error corrected, the parameters cause the following: AT\K0 AT\K1 AT\K2 AT\K3 AT\K4 AT\K5 i-modul Modem 144/56k 3.0 basic deletes the data buffer, sends break to PC Like AT\K0 i-modul Modem 144/56k 3.0 basic sends break immediately to the PC Like AT\K2 i-modul Modem 144/56k 3.0 basic sends a break to the application embedded into the data received from the other i-modul Modem 144/56k 3.0 basic. Like AT\K4 ATL<n> Speaker volume This command controls the speaker volume (refer to command ATM). ATL1 ATL2 ATL3 Speaker volume low (default) Speaker volume medium Speaker volume high 34

i-modul Modem 144/56k AT Command Reference Command AT%L Description Displaying level of the received signal The value indicated by the i-modul Modem 144/56k 3.0 basic corresponds already with the amplified level in the i-modul Modem 144/56k 3.0 basic, not the level on the phone line. Large AT%L responses imply a low signal level; small values imply a high signal level. (009 = -9db, 043 = -43db) ATM<n> Speaker control This command controls when the speaker is active (refer to the command ATL<n>). ATM0 ATM1 ATM2 ATM3 Speaker always OFF Speaker ON during dialling and connection setup (default) Speaker always ON Speaker ON during connection setup AT+MR=<n> Displaying the modulation type The command AT+MR=<n> enables the display of the modulation type after the message CONNECT. AT+MR=0 AT+MR=1 AT+MR=2 Switches the display function OFF (default). Switches the display function ON. The displayed value applies to the sent data. Switches the display function ON. The displayed value applies to the received data. If the display function is enabled, the i-modul Modem 144/56k 3.0 basic displays the modulation type and the line speed following the CONNECT message. Following the message CONNECT, the line "+MCR: " appears followed by the modulation type (refer to the AT+MS command) and the line "+MRR: " followed by the line speed. Note: The AT+MR command is useful for a connection check. 35

AT Command Reference i-modul Modem 144/56k Command AT+MS=<Modula tion>, [Automode], [Send Minbaud, Send Maxbaud], [Reception Minbaud, Reception Maxbaud] Description Select modulation type AT+MS determines the modulation type. The command enables or disables automatic modulation recognition and defines the highest and lowest possible connection speed. The command has the form AT+MS=<Modulation>, [Automode], [Send Minbaud, Send Maxbaud], [Reception Minbaud, Reception Maxbaud] AT+MS? Shows the current setting AT+MS=? Displays a list of possible parameters Default factory setting: Model 56k Model 336 V92 V34 Parameter Modulation: The modulation parameter determines the preferred (automode = 1) or the mandatory (automode = 0) modulation type. The following values are available: V21 V.21 300 V22 V.22 1200 V22B V.22bis 2400 or 1200 V23C V.23 1200 V32 V.32 9600 or 4800 V32B V.32bis 14400, 12000, 9600, 7200 or 4800 V34 V.34 33600, 31200, 28800, 26400, 24000, 21600, 19200, 16800, 14400, 12000, 9600, 7200, 4800 oder 2400 (only 336 and 56k) V90 V.90 56000, 54667,53333,52000, 50667, 49333, 48000, 46667, 48000, 46667, 45333, 42667, 41333, 40000, 38667, 37333, 36000, 34667, 33333, 32000, 30667, 29333, 28000 (only 56k) V92 V.92 56000, 54667,53333,52000, 50667, 49333, 48000, 46667, 48000, 46667, 45333, 42667, 41333, 40000, 38667, 37333, 36000, 34667, 33333, 32000, 30667, 29333, 28000 (only 56k) B103 Bell 103 300 B212 Bell 212 1200/75 36

i-modul Modem 144/56k AT Command Reference Command AT+MS=<Modula tion>, [Automode], [Send Minbaud, Send Maxbaud], [Reception Minbaud, Reception Maxbaud] (Continuation) Description Parameter Automode: The optional parameter automode determines whether the i-modul Modem 144/56k 3.0 basic automatically adjusts to the desired modulation type. The following values may be used: 0 Automatic modulation adjustment disabled 1 Automatic modulation adjustment enabled Parameter Reception Minbaud: The optional parameter minbaud determines the lowest possible baud rate for i- modul Modem 144/56k 3.0 basic reception. Parameter Reception Maxbaud: The optional parameter maxbaud determines the highest possible baud rate for i- modul Modem 144/56k 3.0 basic reception. Parameter Send Minbaud: The optional parameter minbaud determines the lowest possible baud rate, the i- modul Modem 144/56k 3.0 basic sends with. Parameter Send Maxbaud: The optional parameter maxbaud determines the highest possible baud rate, the i- modul Modem 144/56k 3.0 basic sends with. AT\N<n> Selecting the error correction This command determines which type of error correction should preferably be used for subsequent connections. AT\N0 AT\N1 AT\N2 AT\N3 AT\N4 AT\N5 Disabling the error correction (normal buffered mode) Bit direct mode (only for special data formats) Selects V.42LAP-M or MNP 4 error correction. If no error corrected connection can be established, the modem will hang up. Selects V.42LAP-M or MNP 4 error correction. If such a connection cannot be established, the modem will attempt to establish a connection that is not error corrected. (default) Exclusively selects a V.42 LAP-M connection. Dials exclusively MNP 4 connections. ATO<n> Returning to online data mode If the i-modul Modem 144/56k 3.0 basic is in online command mode, it will return to online data mode. If the i-modul Modem 144/56k 3.0 basic is in offline command mode, it reports ERROR. ATO0 Returning to online data mode. ATO1 Before the modem switches to online data mode, a retrain procedure is provoked. 37

AT Command Reference i-modul Modem 144/56k Command ATP Description Switch on pulse dialling method (deactivated for some models) Starting with this command, each dial-up is performed with the pulse dialling method, until an ATT or ATDT command switches it back to tone dialling. ATQ<n> Quiet control This command enables or disables sending messages from the i-modul Modem 144/56k 3.0 basic to the application. ATQ0 ATQ1 Send messages to the application (default) Don t send messages to the application AT%Q Displaying the quality of the telephone connection Displays the quality of the data connection (deviation from the eye diagram). Low values indicate a good line quality. The line quality value must be evaluated differently depending on the negotiated data rate. Connections with more than 9600 baud will reach the value "000" for good lines and should not have values of more than "010". For connections with 33600 baud good lines will have values between 010 030. Depending on the settings and the modulation type a fall back or retrain is triggered if the line quality is too bad to enable a new negotiation of the connection (if necessary with a slower speed). High values indicate bad quality. These values are constantly updated during a connection. If the value increases significantly during a connection, the quality will deteriorate. After a previous AT%E command, an Autoretrain is performed. AT&R RTS/CTS behaviour This command determines how the modem treats the RTS/CTS (CT105/CT106) data flow control lines (refer also to the command AT&K<n>). AT&R0 AT&R1 CTS behaviour complies with V.25bis. CTS is deactivated during the connection setup after recognition of the response or ringing tones and will only be activated after the connection is set up. CTS only switches to OFF when this is required by the data flow control (default). ATS<n> Reading/writing the S registry Depending on the country settings, the S registers may only be changed within certain limits. The i-modul Modem 144/56k 3.0 basic still reports OK, although the value has not changed as specified. We recommend checking the results after each write attempt, using the ATS<n>? command. ATS<n>=<x> Sets the S register n to the value x ATS<n>? Shows the value of the S register n 38