P16-IP KVM Switch English User Manual LINDY No. 32532 www.lindy.
About this manual This manual is divided into four sections. The first section is an introduction to the P16-IP; the second section deals with installing and connecting the switch; the third section describes the basic operation of the KVM switch from the locally connected console; the fourth section describes operation via IP access.
Contents SECTION 1 .................................................................................................................................. 3 1.1 About the P16-IP .......................................................................................................... 4 1.2 Product Features ......................................................................................................... 5 1.3 Package Contents.................................................................................
Section 1 Introducing the P16-IP 3
Section 1 Introducing the P16-IP 1.1 About the P16-IP Thank you for purchasing the LINDY P16-IP! This advanced 16 port KVM switch allows direct control of up to 16 computers from a single KVM (Keyboard, Video, and Mouse) console. Additionally, built-in KVM over IP technology allows a remote operator to access the switch, and the computers connected to it, from almost anywhere in the world using a simple web browser interface.
Section 1 Introducing the P16-IP 1.2 Product Features 16 port KVM switch in a 1U, 19” rackmount size design Local console operation and KVM over IP control Support for LINDY mice and for all mice up to 5 buttons and 2 wheels with fully Microsoft compatible drivers.
Section 1 Introducing the P16-IP 1.3 Package Contents LINDY CPU Switch P16-IP KVM switch Power Adapter 19” Rackmount Kit RS-232 Serial Cable USB Type A to B Cable KVM Daisy Chain Cable Utility & Manual CD Printed Quick Start Guides 1.4 Cables and Accessories (not included) Apart from the computers to be connected, you will need a keyboard, monitor, and PS/2 mouse to uses as a local console. You will also need dedicated LINDY KVM connection cables to connect the computers to the switch.
Section 2 Hardware Installation 7
Section 2 Hardware Installation 2.1 Product Information & Connection Guide Port Push Button Shift Button Used for direct port selection. To access ports 1 to 8 simply press the button; for ports 9 to 16, press the ‘↵ ↵’ button on the front panel and the required port button simultaneously. This button allows ports 9 to 16 to be selected. Port LED Display When the LED labelled ‘P’ is illuminated green a computer attached to this port is powered on.
Section 2 Hardware Installation 2.2 Rackmount Installation Before you start please verify that all parts are included according to the package contents. If you want to install the CPU Switch in a 19” server rack please attach the enclosed 19” rackmount brackets using the included screws. 2.3 Connecting an External Power Switch option At the time of writing (November 2006) the P16-IP supports the following external power switch options.
Section 2 Hardware Installation 2.4 Cascading / Daisy Chaining of multiple KVM Switches The P16-IP can be cascaded with LINDY P-Series CPU switches only. It should not be used with LINDY PXT-Series CPU Switches. For all cascaded installations, the P16-IP should always be used as the MASTER switch. To connect an additional switch to the MASTER (or previous) switch, you must use a standard (VGA + 2 x PS/2) 3-in-1 KVM cable, all connectors male.
Section 3 KVM Switch Operation 11
Section 3 KVM Switch Operation 3.1 KVM Switch Operation Important note: Your monitor will only display one PC signal at any one time. All keyboard and mouse commands are sent to this PC only. After initial power up, port 1 is active by default. When a PC is connected to the currently selected port and it is not switched on, or is in sleep mode, the monitor will not display any signal. Password Security When you power on the P16-IP it will ask you for a password.
Section 3 KVM Switch Operation Computer / Port Selection You can select the computer you want to access in three different ways: Front panel push button selection Keyboard hotkey selection On screen display menu selection Port LED Display The front panel of the switch has two LEDs for each port. When the LED labelled “P” is illuminated GREEN a computer attached to this port is powered on. When the LED labelled “S” is illuminated RED, the KVM console is connected to this port.
Section 3 KVM Switch Operation 3.2 Keyboard Hotkey Selection You can also conveniently select the computer to be accessed and displayed by switching ports through simple keyboard key sequences. To send commands to the KVM switch, the “SCROLL LOCK” key must be pressed twice within 2 seconds. You will hear a beep to confirm that the keyboard is in hotkey mode. If you have not pressed any key in hotkey mode within 2 seconds, the keyboard will return back to Operating System control status.
Section 3 KVM Switch Operation Auto Scan mode: Scroll Lock + Scroll Lock + S = Auto Scan (Press any key to exit Auto Scan Mode) Beeper Function (Enables and Disables beep during Auto Scan): + Scroll Lock + Scroll Lock + B = Beeper 15
Section 3 KVM Switch Operation 3.3 On Screen Display Menu (OSD) Port Selection The On Screen Display menu provides a lot of information about the P16-IP and the attached computers, and offers advanced administration features and full KVM Switch control to the user.
Section 3 KVM Switch Operation The OSD Menu displays the following screen a. You can toggle between the 3 parts of the OSD menu (Bank PC names, KVM Switch Settings) using the TAB key. The lower light blue part of the OSD lists keyboard controls. BANK : 1 01 SYSTEM 01 02 SYSTEM 02 03 SYSTEM 03 04 SYSTEM 04 05 SYSTEM 05 06 SYSTEM 06 07 SYSTEM 07 08 SYSTEM 08 09 SYSTEM 09 10 SYSTEM 10 11 SYSTEM 11 12 SYSTEM 12 13 SYSTEM 13 14 SYSTEM 14 OSDSYSTEM : 10 SEC.
Section 3 KVM Switch Operation j. SCAN displays the scan duration per channel in Auto Scan Mode. The default SCAN time is 10 sec., the maximum scan time can be set to 99 sec, it cannot be less then 5 sec. k. CONSOLE ON/OFF is used to prevent unauthorized use of the console. “CONSOLE ON” means that any user can access the console. “CONSOLE OFF” (factory default) means that any user will have to enter the password before getting access.
Section 4 IP Access Configuration & Operation 19
Section 4 IP Access Configuration & Operation 4.1 Configuration The P16-IP’s communication interfaces are Parameter all based on TCP/IP. The switch comes pre- IP auto configuration configured with the IP configuration detailed IP-Address here: Net-mask Default-Gateway Value DHCP 255.255.255.0 none Note: If the DHCP connection fails on boot-up, the P16-IP will not have an IP address.
Section 4 IP Access Configuration & Operation 4.2 P16-IP Setup Tool MAC Address Detection Connect the P16-IP to your computer either via a local network, or via USB. If you use a USB connection Windows will detect the P16-IP as a ‘Removable Disk’ and an appropriate drive letter will be assigned. Start the setup tool from the CD ROM. A window opens as shown below: On the upper left corner, the MAC address of the P16-IP is displayed. To detect the MAC address, press the Refresh Devices button.
Section 4 IP Access Configuration & Operation Authentication To adjust the authentication settings, enter your login as a super user and change your password. Super user login Enter the login name of the super user. The initial value is super. All of the characters are lower case. Super user password Enter the current password for the super user. This initial value is pass. All of the characters are lower case. New super user password Enter the new password for the super user.
Section 4 IP Access Configuration & Operation 4.3 Keyboard, Mouse and Video Configuration Between the P16-IP and the host, there are two interfaces available for transmitting keyboard and mouse data: USB and PS/2. The correct operation of the remote mouse depends on several settings which will be discussed in the following subsections. Please see page 30 for details of how to make the specific changes to the mouse settings described below.
Section 4 IP Access Configuration & Operation Host System Mouse Settings The host' s operating system obtains various settings from the mouse driver. Note: The following limitations do not apply when using USB mice and Windows 2000 and higher! Special Mouse Driver There are mouse drivers which influence the synchronization process and lead to desynchronized mouse pointers. If this happens, make sure you do not use a special vendorspecific mouse driver on your host system.
Section 4 IP Access Configuration & Operation Recommended Mouse Settings For the different operating systems we can give the following advice... MS Windows 2000/2003 (Professional and Server), XP In general, we recommend the use of a USB mouse. Choose USB without Mouse Sync. For a PS/2 mouse choose Auto Mouse Speed. For XP disable the option called enhance pointer precision in the Control Panel.
Section 4 IP Access Configuration & Operation 4.4 Usage Prerequisites The P16-IP features an embedded operating system offering a variety of standardized interfaces. This section will describe these interfaces, and the way to use them in a more detailed manner. The interfaces are accessed using the TCP/IP protocol family. The following interfaces are supported: Telnet A standard Telnet client can be used to access an arbitrary device connected to the P16-IP’s serial port via a terminal.
Section 4 IP Access Configuration & Operation 4.5 Logging In Login to the P16-IP Launch your web browser. Direct it to the address of your P16-IP which you configured during the installation process. The address used might be a plain IP address or a host and domain name if you have given your P16-IP switch a symbolic name in the DNS.
Section 4 IP Access Configuration & Operation 4.6 Navigation Once logged into the P16-IP successfully, the main page appears. This page consists of three parts; each of them contains specific information. The buttons in the upper area allow you to navigate within the front end. The lower left area contains a navigation bar and allows you to switch between the different sections of the P16-IP. Within the main area, task-specific information is displayed.
Section 4 IP Access Configuration & Operation The Remote Console is the redirected screen, keyboard and mouse of the remote host system that the P16-IP switch controls. Selecting this button opens the Remote Console Main Window. The Remote Console window is a Java Applet that establishes its own TCP connection to the P16-IP. The protocol that runs over this connection is neither HTTP nor HTTPS, but RFB (Remote Frame Buffer Protocol). RFB needs to establish a connection to port number 443.
Section 4 IP Access Configuration & Operation Note: Your local keyboard changes its keyboard layout according to the remote host system. If you use a German administration system and your host system uses a US English keyboard layout for instance, some special keys on the German keyboard will not work as expected. Instead, the keys will result in their US English counterpart. You can circumvent such problems by adjusting the keyboard of your remote system to the same mapping as your local one.
Section 4 IP Access Configuration & Operation Options Opens the Options menu. A short description of the each of the options follows: Monitor Only Toggles the ‘Monitor Only’ filter on or off. If the filter is switched on, no remote console interaction is possible but monitoring is. Exclusive Access If a user has the appropriate permission, he can force the Remote Consoles of all other users to close.
Section 4 IP Access Configuration & Operation Video Settings through the remote console: Brightness Controls the brightness of the picture Contrast Controls the contrast of the picture Clock Defines the horizontal frequency for a video line and depends on the video mode. Different video card types may require different values here. The default settings in conjunction with the auto adjustment procedure should be adequate for most common configurations.
Section 4 IP Access Configuration & Operation Undo Changes Restore last settings Soft Keyboard Opens up the sub-menu for the Soft-Keyboard: Show Pops up the Soft-Keyboard. The Soft-Keyboard is necessary in case your host system runs a completely different language and country mapping than your administration machine. Mapping Used for choosing the language and country mapping of the Soft-Keyboard. Local Keyboard Used to change the language mapping of your browser running the Remote Console Applet.
Section 4 IP Access Configuration & Operation Remote Console Status Line Status line Shows both console and the connection state. The size of the remote screen is displayed. The example below was taken from a Remote Console with a resolution of 1024 x 768 pixels. The value in brackets describes the connection to the Remote Console. Norm means a standard connection without encryption, SSL indicates a secure connection.
Section 4 IP Access Configuration & Operation 4.7 Menu Options 4.7.1 Remote Control KVM Console To open the KVM console, click either the menu entry on the left or on the console picture on the right. To refresh the picture, click on the Refresh button. For the Remote Power settings see Section 2.3 on page 9.
Section 4 IP Access Configuration & Operation Telnet Console The P16-IP firmware features a Telnet server that enables a user to connect via a standard Telnet client. If the Telnet program is using a VT 100, VT 102 or VT 220 terminal or appropriate emulation, it is even possible to perform a console redirection, as long as the P16-IP host is using a text mode screen resolution. Connecting to the P16-IP is done as usual and as required by the Telnet client, for instance in a UNIX shell: telnet 192.168.1.
Section 4 IP Access Configuration & Operation The following list shows the command mode syntax and usage. Help Displays the list of possible commands Cls Clears the screen Quit Exits the current session and disconnects from the client Version Displays the release information Terminal Starts the terminal pass-through mode for the serial port. The key sequence ‘esc exit’ switches back to the command mode.
Section 4 IP Access Configuration & Operation 4.7.2 Virtual Media One of the computers connected to the P16-IP can also be set up for remote mass storage via a USB connection. Files can be uploaded to the switch, which the host computer ‘sees’ as virtual drives. This means the remote operator can remotely install software, drivers etc. without the need to be sat in front of the host computer.
Section 4 IP Access Configuration & Operation Windows Windows users should use the tool, RawWrite for Windows, which is included on the supplied CD. Launch RawWrite, you will see the window opposite: Insert your floppy disk into your floppy drive. Click the Read tab and then click on Select a name and destination for the floppy image file and click the Read button. As the image is written, you will see the progress as a percentage figure in the bottom left hand corner.
Section 4 IP Access Configuration & Operation Create a CD-ROM/ISO Image Follow the procedure below to create a CD-ROM image which can be accessed by the host system via the P16-IP. The image file must be an ISO file format! First, on your client PC you must create an image of your CD which can be accessed by the host system. UNIX and UNIX-like OS To create an image file, make use of dd. This is one of the original UNIX utilities and is included in every UNIX-like OS (UNIX, Sun Solaris, Linux).
Section 4 IP Access Configuration & Operation Windows To create the image file, use your favourite CD imaging tool. Copy the whole contents of the disc into one single image file on your hard disk. For example, with ‘Nero’ choose ‘Copy and Backup’. Then, navigate to the ‘Copy Disc’ section. Select the CD ROM or DVD drive you would like to create an image from. Specify the filename of the image, and save the CD ROM content in that file. Example: 1. Create a CD image and name it image.iso 2.
Section 4 IP Access Configuration & Operation 7. You will see the dialog below detailing the active image: 8. Click Reactivate. Access the console window and you will see that another CD drive has been installed on the host computer. This is the virtual drive you have just set up. You can access the uploaded CD image as though it were a regular CD. Click Unset to remove the image. SAMBA If you would like to access the share via SAMBA, SAMBA must be set up properly.
Section 4 IP Access Configuration & Operation Drive Redirection The Drive Redirection feature allows the host system to access the CD-Rom drives, hard drives, floppy drives etc. on your client PC. To use this feature you need the Drive Redirection Tool which is part of the KVM Vision Viewer application included on the supplied CD. 1. To set up Drive Redirection, first install KVM Vision Viewer.
Section 4 IP Access Configuration & Operation 2. Click on the Search for new devices icon The P16-IP will be detected as an Unconfigured device and its MAC address will be displayed in the left panel. Double click on the MAC address to launch the Device Configuration Wizard. 3. Follow the on-screen instructions. You will be asked to input your user name (default is super) and password (default is pass). 4. Continue with the Wizard until the device is correctly configured.
Section 4 IP Access Configuration & Operation 1. Choose the drive you wish to redirect from the drop-down list. Enter your user name and password and click OK. Warning: Please be aware that if Allow Write Support is selected, data on the shared media may be lost! 2. Access the host computer from the Remote Console window. You will see that the redirected drive will now be shown in Windows Explorer: IMPORTANT 1. Drive Redirection is only possible with Windows 2000 and later versions. 2.
Section 4 IP Access Configuration & Operation 4.7.3 User Management Change Password To change your password, enter the new password in the upper entry field. Retype the password in the lower field. Click Apply to submit your changes.
Section 4 IP Access Configuration & Operation Users And Groups The P16-IP comes with 2 pre-configured user accounts that have fixed permissions. The super account has all possible rights to configure the device and to use all functions. The user account has only the permission to open and use the Remote Console. The default password for both accounts is pass. Ensure you change the passwords as soon as you have installed and accessed the P16-IP for the first time.
Section 4 IP Access Configuration & Operation 4.7.4 KVM Settings User Console The following settings are user specific. This means the super user can customize these settings for individual users separately. Changing the settings for one user does not affect the settings for the other users. User select box This box displays the user ID for which the values are shown and for which the changes will take effect. You may change the settings of other users if you have the necessary access rights.
Section 4 IP Access Configuration & Operation Manually Allows adjustment of both compression rate and colour depth individually. Depending on the selected compression rate the data stream between the P16-IP and the Remote Console will be compressed in order to save bandwidth. Since high compression rates are very time consuming, they should not be used when several users are accessing the P16-IP simultaneously. The standard colour depth is 16 bit (65536 colours).
Section 4 IP Access Configuration & Operation Sun Microsystems Java Browser Plugin Instructs the web browser of your administration system to use Sun’s JVM. The JVM in the browser is used to run the code for the Remote Console window which is actually a Java Applet. If you check this box for the first time on your administration system and the appropriate Java plug-in is not already installed on your system, it will be downloaded and installed automatically.
Section 4 IP Access Configuration & Operation Keyboard/Mouse Host Interface Enables the interface the mouse is connected to. You can choose between Auto for automatic detection, USB for a USB mouse, or PS/2 for a PS/2 mouse. Note: To use the USB and/or PS/2 interface you need the correct cabling between the managed host and the managing device.
Section 4 IP Access Configuration & Operation USB Mouse Type Enables USB mouse type. Choose between MS Windows 2000 or newer for MS Windows 2000 or Windows XP, or Other Operating Systems for MS Windows NT, Linux, or OS X. In MS Windows 2000 or newer mode the remote mouse is always synchronized with the local mouse. Mouse Speed Auto mouse speed Use this option if the mouse settings on the host use an additional acceleration setting.
Section 4 IP Access Configuration & Operation really changing (depending on the quality of the video input signal). All in all the default setting should be suitable for most situations. Force Composite Sync (Required for Sun Computers) To support signal transmission from a Sun machine, enable this option. If not enabled the picture of the remote console will not be visible. To set the options, click Apply. 4.7.
Section 4 IP Access Configuration & Operation IP auto configuration With this option you can control if the P16-IP should obtain its network settings from a DHCP or BOOTP server. For DHCP, select dhcp, and for BOOTP select bootp. If you choose none then IP auto configuration is disabled. IP address IP address in the usual dot notation. Subnet Mask The net mask of the local network.
Section 4 IP Access Configuration & Operation Dynamic DNS A freely available Dynamic DNS service (dyndns.org) can be used in the following scenario (see illustration below) The P16-IP is reachable via the IP address of the DSL router, which is dynamically assigned by the provider. Since the administrator does not know the IP address assigned by the provider, the P16-IP connects to a special dynamic DNS server in regular intervals and registers its IP address there.
Section 4 IP Access Configuration & Operation Enable Dynamic DNS Enables the Dynamic DNS service. This requires a configured DNS server IP address. Dynamic DNS server This is the server name where the P16-IP registers itself in regular intervals. At the time of writing, this is a fixed setting since only dyndns.org is currently supported. Hostname This is the hostname of the P16-IP that is provided by the Dynamic DNS Server. (Use the whole name including the domain, e.g. testserver.dyndns.
Section 4 IP Access Configuration & Operation Security Force HTTPS If this option is enabled, access to the web front-end is only possible using an HTTPS connection. The P16-IP will not listen on the HTTP port for incoming connections. If you want to create your own SSL certificate that is used to identify the P16-IP please refer to the section called Certificate on page 58. KVM encryption This option controls the encryption of the RFB protocol.
Section 4 IP Access Configuration & Operation Certificate The P16-IP uses the Secure Socket Layer (SSL) protocol for any encrypted network traffic between itself and a connected client. During the connection establishment the P16-IP has to expose its identity to a client using a cryptographic certificate. This certificate and the underlying secret key is the same for all P16-IP units and certainly will not match the network configuration that will be applied to the P16-IP by its user.
Section 4 IP Access Configuration & Operation After completing these three steps, the P16-IP has its own certificate that is used to identify it to its clients. Note: If you destroy the CSR on the P16-IP there is no way to get it back! In case you deleted it by mistake, you have to repeat the three steps as described previously.
Section 4 IP Access Configuration & Operation Confirm Challenge Password Confirmation of the Challenge Password Email The email address of a contact person that is responsible for the P16-IP and its security. Key length This is the length of the generated key in bits. 1024 bits are sufficient for most cases. Longer keys may result in slower response time by the P16-IP during connection establishment.
Section 4 IP Access Configuration & Operation Serial Port The P16-IP Serial Settings allow you to specify what device is connected to the serial port and how to use it. Configuration or console login Do not use the serial port for any special function; use it only for the initial configuration Modem The P16-IP offers remote access using a telephone line in addition to the standard access over the built-in Ethernet adapter. The modem needs to be connected to the serial interface of the P16-IP.
Section 4 IP Access Configuration & Operation Modem Init String The initialization string used by the P16-IP to initialize the modem. The default value will work with all modern standard modems directly connected to a telephone line. In case you have a special modem or the modem is connected to a local telephone switch that requires a special dial sequence in order to establish a connection to the public telephone network, you can change this setting by entering a new string.
Section 4 IP Access Configuration & Operation Date And Time Here you can set the internal real-time clock of the P16-IP. You can adjust the clock manually or use an NTP timeserver. Without a timeserver your time setting will be lost if the P16-IP is powered down for more than a few minutes. To avoid this, you can use an NTP timeserver which sets up the internal clock automatically to the current UTC time.
Section 4 IP Access Configuration & Operation Event Log Important events like a login failure or a firmware update are logged to a selection of logging destinations. Each of those events belongs to an event group, which can be activated separately. In the Event Log Settings you can choose how many log entries are shown on each page. Furthermore, you can clear the log file here. List logging enabled The common way to log events is to use the internal log list of the P16-IP.
Section 4 IP Access Configuration & Operation SMTP Logging enabled With this option, the P16-IP is able to send Emails to an address given by the Email address text field in the Event Log Settings. These mails contain the same description strings as the internal log file and the mail subject is filled with the event group of the occurred log event.
Section 4 IP Access Configuration & Operation 4.7.6 Maintenance Device Information This section contains a summary showing various information about the P16-IP and its current firmware. It also allows you to reset the unit. View the data file for support Allows you to download the P16-IP data file with specific support information. This is an XML file with certain customized support information like the serial number etc. You can send this information if you contact LINDY technical support.
Section 4 IP Access Configuration & Operation Event Log Displays the log list including the events that are logged by the P16-IP. Update Firmware The P16-IP is a complete standalone computer. The software it runs is called the firmware. The firmware of the P16-IP can be updated remotely in order to install new functionality or special features.
Section 4 IP Access Configuration & Operation A new firmware update is a binary file which can be sent to you by email or which you can download from our website www.lindy.com. Updating the firmware is a four stage process: 1. The new firmware file is uploaded to the P16-IP. In order to do this you need to select the file on your local system using the Browse button on the Upload Firmware panel.
Section 4 IP Access Configuration & Operation Unit Reset This section allows you to reset specific parts of the device. This involves the keyboard and mouse, the video engine and the P16-IP itself. Resetting the unit itself is mainly needed to activate a newly updated firmware. It will close all current connections to the administration console and to the Remote Console. The whole process will take about half a minute. Resetting sub devices (e.g.
Troubleshooting Troubleshooting If none of the LED displays on the KVM Switch are illuminated, please check that the power adapter is connected and switched on at the mains. Before you check any further please make sure that all cables are well connected! KVM Switch Troubleshooting If the KVM Switch reacts to keyboard input from the SCROLL LOCK key with a beep signal but you get no monitor picture displayed please check if the currently selected computer is in sleep mode or powered down.
Troubleshooting IP Access Troubleshooting 1. The remote mouse doesn’t work or is not synchronized Make sure the mouse settings in P16-IP match the mouse model. Use the Intelligent Sync option from the Mouse Handling sub menu of the Remote Console Options menu. 2. The remote mouse does not work correctly Try using the Reset Keyboard/Mouse option in the Maintenance section as described on page 69. 3.
Technical Information Key Codes This table shows the key codes used to defines keystrokes or hotkeys for several functions. Please note that these key codes do not necessarily represent key characters that are used on international keyboards. They name a key on a standard 104 key PC keyboard with US English language mapping. 0-9 A-Z , TILDE -, MINUS =, EQUALS ; ’ <, LESS , .
Technical Information The layout for this keyboard is also shown. However, most modifier keys and other alphanumeric keys used for hotkey purposes in application programs are in an identical position, no matter what language mapping you are using. Some of the keys have aliases also; they can be named by 2 key codes (separated by a comma in the previous table).
Technical Information Video Modes The table below lists the video modes that the P16-IP remote console supports. Please do not use any other custom video settings; the P16-IP may not be able to detect them.
Certifications, Recycling Information WEEE (Waste of Electrical and Electronic Equipment), Recycling of Electronic Products United Kingdom In 2006 the European Union introduced regulations (WEEE) for the collection and recycling of all waste electrical and electronic equipment. It is no longer allowable to simply throw away electrical and electronic equipment. Instead, these products must enter the recycling process.
Certifications, Recycling Information CE Statement This device complies with the European Regulations for Electromagnetic Compatibility (EMC) of the European Union and it is equipped with the CE mark. This unit has to be used with high quality shielded connection cables. Only if these high quality shielded cables are used can it be sure that the EMC compatibility is not adversely influenced.
