Related Manuals for VSCOM netcom 123
Summary of Contents for VSCOM netcom 123
- Page 1 VS NetCom Wireless Serial Device Server WLAN Versions User Manual NetCom 123, 423, 823RM and 1623RM...
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Page 2: Table Of Contents
Find and configure NetCom Devices ......17 4.1.2.1. Configure IP Parameters........18 4.1.2.2. Configure Firewall..........18 4.1.3. Install Drivers ............... 19 4.2. VERIFY THE INSTALLATION........20 4.3. UNINSTALL THE DRIVERS .......... 22 5. SOFTWARE CONFIGURATION ......23 Page NetCom 123 WLAN, 423 WLAN,... - Page 3 5.1. CONFIGURE IN WEB-INTERFACE ......25 5.1.1. Webbrowser Server Configuration....... 26 5.1.1.1. Server Info ............26 5.1.1.2. Server Parameter........... 27 5.1.1.3. Wireless Parameter ..........28 5.1.1.4. Encrypted Communication ........29 5.1.1.5. Authentification ............ 31 5.1.1.6. Date & Time ............31 5.1.2.
- Page 4 5.3.4.6. Firmware............... 73 5.3.5. Save&Exit Menu ............74 5.3.5.1. Save Parameter ............. 74 5.3.5.2. Exit................ 74 5.3.5.3. Reboot..............74 5.4. CONFIGURE NETCOM VIA SERIAL CONSOLE ..75 6. THE VIRTUAL COM DRIVER ......76 Page NetCom 123 WLAN, 423 WLAN,...
- Page 5 6.1. INSTALLATION OF NETCOM SERVERS....76 6.1.1. Changing the Installation..........78 6.2. CONFIGURE THE SERIAL PORTS ......79 6.3. PERFORMANCE ISSUES..........80 6.4. NETWORK & MISC PROPERTIES....... 81 6.5. REMOTE SETTINGS PROPERTIES......83 7. UNINSTALLING THE SOFTWARE ..... 85 8. SPECIAL FUNCTIONALITIES ......87 8.1.
- Page 6 8.3.3.3. Start OpenVPN™ by Command line ....109 8.3.3.4. Start OpenVPN™ as Windows Service ..... 110 8.3.4. OpenVPN without Encryption........111 8.3.5. Reconfigure Virtual Serial Ports for OpenVPN™ ..112 9. TCP/IP DESCRIPTION........113 Page NetCom 123 WLAN, 423 WLAN,...
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Page 7: Able Of
Define NetComs IP Configuration ............18 Use current drivers dialog..............19 Install drivers for the serial ports............20 VScom drivers in the Start Menu ............20 NetCom in Device Manager ..............21 NetCom Manager NT ................21 Uninstall NetCom Drivers ..............22 NetCom Manager ................. - Page 8 Web Panel Save/Load Configuration ........... 42 Web Panel Syslog & Debug ..............42 NetCom Manager ................. 43 NetCom Manager in Start Menu ............43 NetCom Manager in Device Manager..........43 NetCom Manager “Servers” Panel ............44 Page NetCom 123 WLAN, 423 WLAN,...
- Page 9 NetCom Manager Server Settings ............45 NetCom Manager Ports Panel .............. 46 NetCom Manager Firewall Panel ............47 NetCom Manager Options Panel............48 NetCom Manager Firewall Panel ............51 NetCom Manager Port Configuration for Driver ......... 52 Telnet Password protected option............54 Telnet Open configuration menu ............
- Page 10 Uninstall in Control Panel -> Add/Remove programs ......85 Uninstall in the Start Menu..............85 Confirm Uninstall of Drivers..............85 Installation Wizard to uninstall Drivers..........86 Add a printer..................99 Select Printer Port................100 Create Printer Port ................100 Page NetCom 123 WLAN, 423 WLAN,...
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Page 11: Table Of Tables
IP Modem Standard AT-Commands ............ 90 IP Modem Extended AT-Commands ........... 91 IP Modem S-Registers for Configuration..........91 Master Switch Configuration of NetCom 123, 423, 823RM and 1623RM ..................115 Signal Assignment DB9 male............. 116 RS422/485 Jumper Configuration ............117... -
Page 12: Introduction
Three serial port interfaces: RS-232, RS-422 and RS-485 Max. 3.686.400 bps, half- and full-duplex TCP/IP configuration fixed or by DHCP Easy remote configuration via SNMP Drivers for Windows™ and Linux operating systems Documented interface for every networked operating system Page NetCom 123 WLAN, 423 WLAN,... -
Page 13: Product Specifications
2.2. P RODUCT PECIFICATIONS Most of the characteristics are common for all models. However some must differ from model to model. 2.2.1. C OMMON HARACTERISTICS Processor ARM9 (KS8695P) Memory 16MB SDRAM 2MB Flash WLAN antenna SMA-reverse Ethernet connector RJ45 10BaseT/100BaseTx Serial connector DB9 male (similar to PC) Serial Speed... -
Page 14: Specific Characteristics
ACKING LIST √ VS NetCom √ Power supply adapter, 12V 1 A for NetCom 123 WLAN and NetCom 423 WLAN Power cord for NetCom 823RM WLAN and 1623RM WLAN √ CD-ROM with driver and configuration software √ Quick Installation Guide... -
Page 15: Hardware Configuration
ARDWARE ONFIGURATION 3.1. P OWER UPPLY The NetCom device is powered by a single 9-30V power supply. It requires 200 mA up to 1500 mA of current, depending on the device type and voltage supplied. A suitable power supply adapter is part of the packaging. -
Page 16: Ethernet
To avoid these problems, it is recommended not to connect a device to the serial ports in the first installation. The serial ports should be configured for RS232. This is done by setting the DIP switches like this example. Image 1: Master Switch Standard Configuration Page NetCom 123 WLAN, 423 WLAN,... -
Page 17: Windows Driver Quick Installation
Installation Wizard VSNSTUNT.EXE. Start this program to install the drivers. Your screen displays a VScom logo. Select the folder to install programs and drivers into. In most situations the suggested setting is fine, just hit enter. Image 3: Start Driver Installation... -
Page 18: Find And Configure Netcom Devices
Device is listed here. Identify it by comparing the serial Image 5: NetCom in Manager number shown in the NetCom Manager. This program is covered in detail in a later section. For now follow the minimum steps. Page NetCom 123 WLAN, 423 WLAN,... -
Page 19: Configure Ip Parameters
4.1.2.1. Configure IP Parameters As mentioned above, it is important to configure the NetCom to operate in your network. In many networks this is done by a special server. Please ask your Network Administrator for information. If you need to define parameters manually, double-click the devices icon. -
Page 20: Install Drivers
There are no later drivers on the Windows Update website. Select the third item, and click on “Next”. This question neither appears on Windows XP prior to SP2, nor on any previous Windows version. Page NetCom 123 WLAN, 423 WLAN,... -
Page 21: Verify The Installation
4.2. V ERIFY THE NSTALLATION Image 9: VScom drivers in the Start Menu In the Start Menu you’ll find “Vision Systems GmbH”, a new program group. The installed programs are the NetCom Manager and an option for uninstallation. This group is not installed on Windows NT. -
Page 22: Netcom In Device Manager
Additionally there device class “VScom Virtual Com”. All installed NetCom Devices are listed herein. The available options are described later. On Windows NT there is no Device Manager. You’ll find the serial ports listed in the Control panel in the “Ports”... -
Page 23: Uninstall The Drivers
4.3. U NINSTALL THE RIVERS To completely uninstall the NetCom Drivers and files, there are three methods. The usual way is to use the Add/Remove Programs applet in the Control Panel, and remove the NetCom Drivers. This will start the NetCom uninstallation program. -
Page 24: Software Configuration
2003 it is named NETCOMMGR.EXE, while in Windows NT the name is NETCOMMGRNT.EXE. Just double-click to start it direct from the CD-ROM. If you already installed the drivers, the program is also in the Start Menu. Page NetCom 123 WLAN, 423 WLAN,... -
Page 25: Netcom Manager Servers Panel
Image 14: NetCom Manager Servers Panel Identify the NetCom Device by comparing the serial number. Double-click the Icon of the NetCom. You’ll see the IP-Parameters. Note the “IP address”, to use it in your browser or via Telnet. Image 15: NetCom IP-Parameters Page 823RM WLAN, 1623RM WLAN... -
Page 26: Configure In Web-Interface
Whenever this situation occurs, the NetCom requests a REBOOT. It is done like this here, you may reboot now, or do that later when the configuration is finished. Image 17: Webinterface Request to Reboot Page NetCom 123 WLAN, 423 WLAN,... -
Page 27: Webbrowser Server Configuration
5.1.1. W EBBROWSER ERVER ONFIGURATION The Server Configuration is a very long menu. It is divided in its logical sections throughout this document. There is basic server information, the server parameters related to the IP-configuration, the parameters for Wireless communication, the section for encrypted communication, Password settings, and finally the configuration for date and time. -
Page 28: Server Parameter
If this functions is used, you must define an interval in seconds. NetCom has a better chance to react on network problems, or failed hosts. Even dropping an old connection may be useful in certain environments. Page NetCom 123 WLAN, 423 WLAN,... -
Page 29: Wireless Parameter
5.1.1.3. Wireless Parameter To operate a Wireless device, a lot of parameters are required. The configuration in the NetCom is reduced to a small set of them, for ease of configuration. “SSID” is the «Service Set Identifier». This is used to get access to radio cells established by an Access Point. -
Page 30: Encrypted Communication
To build this tunnel NetCom uses the Open Source product OpenVPN™ (http://openvpn.net). This is the configuration of the parameters on the NetCom side. The function and the configuration of OpenVPN™ is described with more details later in the section of OpenVPN™ Client installation. NetCom 123 WLAN, 423 WLAN Page... -
Page 31: Web Panel Openvpn Network Parameter
Of course “OpenVPN” may be , active as Server or Disabled combined Server- Client mode. When the function is active, the NetCom is virtually invisible IP-Address defined in Server Parameter. It will still answer on ICMP, and also the Logging function is available. There is only one connection accepted by the NetCom, to the “TCP Port”... -
Page 32: Authentification
DHCP. The “Interval” in seconds instructs the NetCom to regularly check for an update of the internal time settings. The Time Server may be given by IP-Address, or by name. A Page NetCom 123 WLAN, 423 WLAN,... -
Page 33: Webbrowser Serial Port Configuration
name of course requires a DNS server, see at 5.1.1.2 Server Parameter above. Below these options there is the button “Save”. This will store all configurations done here in the NetCom. In many cases NetCom requires a reboot to proceed. 5.1.2. -
Page 34: Web Panel Advanced Flow Control
NetCom waits some time for further data, before sending the buffer. The “TxTriggerLevel” operates similar for the transmission. If the defined amount is received from the network, the NetCom does not accept more data to transmit. Page NetCom 123 WLAN, 423 WLAN,... -
Page 35: Transfer Settings
5.1.2.2. Transfer Settings The Transfer Settings allow different modes. They are selected by the basic Image 29: Web Panel Serial Port Mode “Mode” setting. Depending on the Selection current mode, only some of the many parameters are useful. The web configuration hides those parameters without function. -
Page 36: Tcp Raw Client
Firmware version 2.0, TCP-connections follow the state of the DSR signal at the NetCom serial port. When it becomes active they are established, until DSR becomes inactive. At that moment the connections are dropped. Page NetCom 123 WLAN, 423 WLAN,... -
Page 37: Null Modem Tunnel
5.1.2.2.4. Null Modem Tunnel This is a mixed mode, requiring parameters for server function and for the destination. The NetCom operates as a server while accepting connections in Driver Mode. If there is no current connection, the NetCom may establish a connection as a client. -
Page 38: Tcp Advanced Settings
“UDP MaxPacketSize” is a limit for the size of UDP packets. When the amount of data received on the serial port reaches this limit, the UDP Frame is assembled and sent to the destination. Page NetCom 123 WLAN, 423 WLAN,... -
Page 39: Print Server Function
“UDP Timeout” defines when NetCom sends the received data as a UDP Frame. If the reception of serial data is interrupted for this time (in milliseconds), the data sampled so far is sent to the destination. “UDP Trigger” defines a sequence of characters. As soon as this sequence is detected in the received data, all data up to the end of this Trigger is sent to the destination. -
Page 40: Ping
The statistics window reports the state of the modem status and control signals. Also the number of state changes. The number of characters sent and received is shown at the bottom. Image 40: Web Panel Port Statistics Page NetCom 123 WLAN, 423 WLAN,... -
Page 41: Netstat
5.1.3.3. Netstat Use Netstat to see the actual connection status of NetCom. This is a standard tool for network debugging. Image 41: Web Panel Start Netstat Update Proto Local Address Foreign Address State 0.0.0.0:23 0.0.0.0:0 LISTEN 0.0.0.0:80 0.0.0.0:0 LISTEN 0.0.0.0:2000 0.0.0.0:0 LISTEN 0.0.0.0:2001... -
Page 42: Wireless
Access Point (listed as Managed), of course in Infrastructure-mode. To connect to this AP the NetCom must use encryption. Since the NetCom itself is in Ad-Hoc mode, the communication is limited to the 802.11b, which results in 11Mb/s as raw transmission speed. Page NetCom 123 WLAN, 423 WLAN,... -
Page 43: Firmware
5.1.3.5. Firmware To upload a new version of the firmware, put the name of the file in the field. Your Webbrowser may allow to search for the file. Click on the “Update” button. While loading the file is checked. If it is valid, it is stored in the Flash Memory. -
Page 44: Configure With Manager Program
NetCom Manager In Windows 2000, XP and 2003 Server the driver software installs a new device class “VScom Virtual Com”. The properties of the class open the NetCom Manager. Additionally the installation of the drivers created a new program group in the Start Menu. -
Page 45: Starting Netcom Manager
5.2.1. S TARTING ANAGER When NetCom Manager is started, it will “Search” the NetCom in your LAN by SNMP. This process may take up to 30 seconds. The devices in a LAN are typically found in the first seconds. If this is enough for you, you can stop the search by click on the “Done”... -
Page 46: Netcom Server Settings - Info
By default the NetCom is set to “Use DHCP” for automatic configuration of IP parameters. This is the suggested method. However there are several situations where this option can not be used. In this case deactivate it. When inactive, other parameters may be changed. Page NetCom 123 WLAN, 423 WLAN,... -
Page 47: Netcom Server Settings - Ports
The basic parameters “IP address” and “Netmask” are mandatory. If any of these is changed, the NetCom Manager calculates a matching address for “Broadcast”. You may also change this address. The DHCP option will also configure the “Default gateway” and the “Name server”. -
Page 48: Netcom Server Settings - Firewall
NetCom. The NetCom does not need any configuration to operate in a Firewall protected environment. This configuration here is for installation of the drivers. There is a Firewall tutorial section later in this manual. Page NetCom 123 WLAN, 423 WLAN,... -
Page 49: Netcom Server Settings - Options
5.2.5. N – O ERVER ETTINGS PTIONS Image 55: NetCom Manager Options Panel This Panel is available since software version 1.4.8.0, in this enhanced version. A “Safe to File” of the configuration is available, as well as the opposing “Load from File” of this data. You can also “Reboot”... -
Page 50: Manual Detection/Installation Of A Netcom
The most easy situation for such a setup is by using a very simple SOHO router as the Firewall. This configuration will show the principle of the technical details. Those principles can be transferred very easy to the configuration of more complicated installations. On the SOHO Page NetCom 123 WLAN, 423 WLAN,... -
Page 51: Soho Virtual Servers
router there is only one public IP-Address on the external side, and typically 254 internal IP-Addresses for the LAN side. These internal addresses may be assigned by DHCP or static. Such routers offer a feature typically named “DMZ”, which in fact is only a single exposed host. -
Page 52: Netcom Detection Through Soho Firewall
SNMP. The NetCom will answer the request, and send it out to your computer. The NAT function in the router will exchange the source IP of the data by its own public value, so the NetCom Manager will see the Page NetCom 123 WLAN, 423 WLAN,... -
Page 53: Serial Ports Through Soho Firewall
answer come from the router. The NetCom Manager is satisfied with this data. This answer brings every required information about the NetCom, including its internal IP-Address. Select the panel of NetCom Manager Server Settings to verify the information, but do not make any changes here. -
Page 54: Dmz And Virtual Servers
When the new IP Address is known via DDNS, the network link is re-established. The NetCom is available again. Even when a serial port has been open, the function will continue seamlessly. Page NetCom 123 WLAN, 423 WLAN,... -
Page 55: Configure Netcom Via Telnet Console
5.3. C ONFIGURE OM VIA ELNET ONSOLE There are many situations, when using the NetCom Manager program for Windows is not appropriate. And a graphical Webbrowser may also be unavailable. To enable configuration also in this situation, there is the Telnet option. It is preferred by many users. To connect your Telnet session you need the IP-address of NetCom. -
Page 56: Telnet Main Menu
“Tools” has some utilities like PING or displays statistics. In “Exit” you may leave the menu or reboot the NetCom. At any time you can get a short hint by typing “H” for help. Page NetCom 123 WLAN, 423 WLAN,... -
Page 57: Server Configuration Menu
Netmask 255.255.255.0 Broadcast 192.168.1.255 Gateway 192.168.1.1 192.168.1.3 Domain netcom.vscom.com.tw ConfigPort PrintServerPort [515 KeepAlive KeepAliveInterval Image 62: Telnet IP-Configuration Parameters Use the cursors to select the parameter you want to change. Hit <Enter> to go in edit mode. Type the new value. -
Page 58: Wireless
5.3.2.2. Wireless To operate a Wireless device, a lot of ServerConfig +--------------------+ parameters are required. The configuration in Parameter the NetCom is reduced to a small set of them, Wireless OpenVPN for ease of configuration. Authentification Date & Time Info +--------------------+ Image 63: Telnet Wireless Configuration... -
Page 59: Encrypted Communication
adapts to the configuration of the Access Point. The “Channel” is used in Ad-hoc mode. “Encryption Type” defines the encryption of the radio transmission. It may be . The WEP encryption may use 40 WPA-PSK/TKIP or 104 bit keys, sometimes also named WEP40/WEP64 or WEP104/WEP128. -
Page 60: Telnet Openvpn Configuration Parameter
AES with a 256 AES-128-CBC bit key. Select the required grade of security. AES-192-CBC AES-256-CBC +---------------+ Image 67: Telnet OpenVPN Encryption If “Logging” is enabled, NetCom sends the messages of OpenVPN™ to the standard debug log output. Page NetCom 123 WLAN, 423 WLAN,... -
Page 61: Telnet Sample Openvpn Key
The NetCom allows to “Generate” a new key from Random Data. This key is displayed in the terminal window. Depending on your terminal program, you need to have the logging capability active to save the data, or on other programs you may directly save the screen content. Here is a sample key displayed. -
Page 62: Authentication
”: NetCom repeats to retrieve time. Interval The “Mode” field allows to decide how to configure the time server. It is either possible to get the server by , or direct specified. The DHCP Page NetCom 123 WLAN, 423 WLAN,... -
Page 63: Info
“Interval” defines how often the NetCom retrieves the time from the “Server”. 5.3.2.6. Info Info brings up general information about the ServerConfig +--------------------+ device. Parameter Wireless OpenVPN Server Info Authentification Date & Time Server Type Info Software Version 1.6.0 +--------------------+ Hardware Version Image 74: Telnet Information Serial Nr. -
Page 64: Serial Ports Menu
[1248 ] is configured by the Master DIP TxFifoLength 2048 TxTriggerLevel [800 switches software, Image 78: Telnet Serial transfer parameters “PortType (current)” displays current setting. If the DIP switches are set for « Selected Page NetCom 123 WLAN, 423 WLAN,... -
Page 65: Telnet Standard Flow Controls
», the operation mode is chosen by the “PortType” Software parameter. The serial port is based on enhanced UARTs, the type and maximum speed are also displayed. These are hardware parameters, and can not be changed. The current UART “Model” may be virtually changed to a less advanced type. -
Page 66: Data Transfer Modes
IP Modem +-------------------------+ Image 84: Telnet Available Transfer Modes To change the current “Mode” of the serial port, place the cursor on the field and hit enter. A drop-down list of the available modes appears. Page NetCom 123 WLAN, 423 WLAN,... -
Page 67: Telnet Parameters For Transfer Modes
For demonstration purposes the “TCP Advanced Settings” mode is selected. All parameters may be changed. This allows some unexpected configurations. Transfer Settings Here this is used to Port Nr. show and explain all Mode TCP Advanced Settings parameters and their Server purposes. -
Page 68: Driver Mode
Driver Mode). In Raw Server mode multiple clients may connect. Serial data received is sent to each client, all clients can send data. The customers application is responsible to avoid data confusion and damage. Page NetCom 123 WLAN, 423 WLAN,... -
Page 69: Tcp Raw Client Mode
Firmware version 2.2 added the option of additional protection by “Password”. When a password is configured, the NetCom sends the question “Password: “ to the client. The user (his application) must first send the password, followed by a <CR> character. The password is not echoed to allow usage with Telnet on a Monitor. -
Page 70: Ip Modem
“UDP Timeout” (given in Milliseconds) is an interval. If no serial data is received for this time, all data available so far is sent as a package. A Page NetCom 123 WLAN, 423 WLAN,... -
Page 71: Print Server Function
value of zero causes all data to be sent immediately. “UDP Trigger” defines a sequence of characters. As soon as this sequence is detected in the received data, all data up to the end of this Trigger is sent to the destination. In most situations such a Trigger includes control or other special characters. -
Page 72: Statistics
LISTEN 0.0.0.0:2001 0.0.0.0:0 LISTEN 0.0.0.0:2010 0.0.0.0:0 LISTEN 0.0.0.0:2011 0.0.0.0:0 LISTEN 0.0.0.0:2020 0.0.0.0:0 LISTEN 0.0.0.0:2021 0.0.0.0:0 LISTEN 0.0.0.0:2030 0.0.0.0:0 LISTEN 0.0.0.0:2031 0.0.0.0:0 LISTEN 192.168.1.98:23 192.168.1.42:3665 ESTABLISHED 0.0.0.0:161 0.0.0.0:33320 192.168.1.98:10397 Image 98: Telnet Sample Netstat output Page NetCom 123 WLAN, 423 WLAN,... -
Page 73: Wireless
5.3.4.4. Wireless When it comes to Wireless communications, it is Tools +-------------+ useful to see a list of possible partner stations on Ping the WLAN. This function is available in many Statistic Netstat drivers, and also in the NetCom WLAN Serial Wireless Device Servers. -
Page 74: Logging
Firmware +-------------+ a second Telnet session, or similar tools. Image 103: Telnet Firmware Update Firmware Update Update Port [2400 ] Start Update Image 104: Telnet Settings, Firmware Update via TCP/IP Page NetCom 123 WLAN, 423 WLAN,... -
Page 75: Save&Exit Menu
5.3.5. S &E 5.3.5.1. Save Parameter When some changes are done, it is possible to Save&Exit +------------------+ save these modified settings here. Confirmation Save Parameter is requested before doing this. Exit Reboot +------------------+ +---------------------------------+ | Do you want to save the changes | Image 105: Telnet Save current Parameters +---------------------------------+... -
Page 76: Configure Netcom Via Serial Console
VT 100 (recommended, but VT52 is also possible), including the Arrow keys. When connected to NetCom you must define the type of terminal used. This is the same configuration option as described above in 5.3.1 Telnet Main Menu. Page NetCom 123 WLAN, 423 WLAN,... -
Page 77: The Virtual Com Driver
IRTUAL RIVER If properly configured, the serial ports of the NetCom Devices appear as virtual serial ports in your computer. The “virtual” means, there is no real hardware related to the serial port. However the driver offers the full functionality of a serial port to the system. The interface used by the driver is VCOMM, which in turn is supported by the Windows API. - Page 78 These are the special options used while installing the driver software. At any time after installation the configuration may be changed by the NetCom Manager program. This may result in serial ports appearing in or vanishing from the system. Page NetCom 123 WLAN, 423 WLAN,...
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Page 79: Changing The Installation
6.1.1. C HANGING THE NSTALLATION There are common situations, when the current configuration needs a change. In the first case the NetCom has been moved to a different location, or the logical structure of the network has changed. It may happen the IP-Address of NetCom is also changed. -
Page 80: Configure The Serial Ports
“Local Settings” tab these standard parameters are defined. Since most programs configure these parameters by themselves, the values are very rarely used. A typical situation is a serial printer attached to this virtual port. Page NetCom 123 WLAN, 423 WLAN,... -
Page 81: Performance Issues
As usual this behaves different in Windows NT. There is no Device Manager. To change these standard parameters, open the “Ports” applet in the Control Panel. However it is suggested you open the new “NetCom Manager” applet instead. Change to the “Ports” view as in Image 110: NetCom Manager Ports View. -
Page 82: Network & Misc Properties
When you use the “Advanced” checkbox on the “Performance” tab, the “Network & Misc” tab opens automatically. Image 115: NetCom COM Port Network & Misc Properties The parameters on this tab control the operation of the driver software on the computer. Page NetCom 123 WLAN, 423 WLAN,... - Page 83 “Tx Network Buffer Size”: If the application sends small chunks of data to the driver, these are buffered to send them in one large packet. This defines the size of the buffer. And also the maximum packet size sent to the serial port by the driver software. “Rx Network Buffer Size”: This is the size of the buffer to receive data from the NetCom.
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Page 84: Remote Settings Properties
6.5. R EMOTE ETTINGS ROPERTIES The other panel created by activating the “Advanced” checkbox on the “Performance” tab, is the “Remote Settings” tab. Image 116: NetCom COM Port Remote Settings Properties Page NetCom 123 WLAN, 423 WLAN,... - Page 85 The parameters on this tab control the operation of the serial port on the NetCom Device. They are defined and activated by the driver software. “Tx Trigger Level”: The serial port on the NetCom Device buffers data for transmission to external devices. If the amount of data in this buffer drops below this level, the NetCom is capable to receive new data.
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Page 86: Uninstalling The Software
There is also a separate uninstall item in the Start Menu. This is the same procedure as in the Control Panel. You are also asked to confirm the de-installation of the drivers. Image 118: Uninstall in the Start Menu Image 119: Confirm Uninstall of Drivers Page NetCom 123 WLAN, 423 WLAN,... -
Page 87: Installation Wizard To Uninstall Drivers
You may also start the Installation Wizard a second time. It will detect the installed drivers. The options are to Re-install the drivers, this is similar repair installation. And it is possible to completely uninstall current drivers. Image 120: Installation Wizard to uninstall Drivers Page 823RM WLAN, 1623RM WLAN... -
Page 88: Special Functionalities
Because of frequent target changes he does not want to define the target by a Virtual Com Port. 3. Remotely distributed devices contact a central system by Modem. This is the reverse of option 1. Page NetCom 123 WLAN, 423 WLAN,... -
Page 89: Serial Signals And Cables
4. A computer without Network access shall have at least limited control on the connections established by a NetCom. 5. Old fashioned BBS installations become accessible via Internet. The typical multi-modem box is replaced by a NetCom Server with multiple ports configured for IP Modem operation. 8.1.2. -
Page 90: Operation Modes By Ip Modem
Modems. All of the commands start with the character sequence ΑΤ. 8.1.4.1. AT command set The following table lists many standard commands (in alphabetical order). The AT is omitted for brevity. The discussion of the functions is below the tables in section 8.1.5 below. Page NetCom 123 WLAN, 423 WLAN,... -
Page 91: Standard At-Commands
8.1.4.1.1. Standard AT-Commands These commands are based on the old Hayes Modem Hayes-Standard IP Modem Function Answer Call Accept a connection ITU-T modulation Define some modem operation modes Dnnn Dial connection, Connect to the target system by basically phone IP-Address and TCP-Port. E.g. number as nnn ATD10,0,8,42,2023 will “dial”... -
Page 92: Non-At Commands
0 (read only, AT\Tnn) Table 9: IP Modem S-Registers for Configuration S0 is frequently used to configure a modem to auto answer incoming calls. S1 may be checked by software if S0 is Zero, i.e. no Page NetCom 123 WLAN, 423 WLAN,... -
Page 93: Sample Commands Used By Windows
Auto-Answer. S2 may be set to a different character, if the “+++” may happen in typical data. Otherwise the software must insert a pause in the transmission. 8.1.4.3. Sample Commands used by Windows The NetCom IP Modem is intended for manual installation as kind of a “Standard Modem”... -
Page 94: At O (Online / Data Mode)
Disable and enable the echo of the commands received. ATE0 to disable and ATE1 to enable the echo. 8.1.5.6. AT Q (quiet) [ATQ0] Configures the Modem to remain quiet. The Modem will not send any response messages to the serial port. Page NetCom 123 WLAN, 423 WLAN,... -
Page 95: At V (Verbose) [Atv1]
8.1.5.7. AT V (verbose) [ATV1] Responses as numeric values (ATV0) or as text strings (ATV1). 0 CONNECT RING 2 NO CARRIER ERROR 4 CONNECT 1200 5 NO DIALTONE 6 BUSY NO ANSWER 8.1.5.8. AT H (hangup) [ATH0] Command to disconnect. Also used as ATH0. The related version ATH1 to just go off-hook is not supported, and reports an ERROR. -
Page 96: At L (Loudness)
Configure the DSR signal to the PC. As IP Modem this signal may be generated by the DTR output. A standard modem can have DSR always on, as long as the Modem has power. Or it can have the DSR signalling Page NetCom 123 WLAN, 423 WLAN,... -
Page 97: At &D (Dtr Configuration) [At&D2]
whether the IP Modem is in command or in data mode. When set to always on by AT&S0 (this is the default) the DSR may have a separate source. The DTR is free to serve as a DCD to the PC. The operation of DCD is defined by AT&C, so these commands are related. -
Page 98: Print Server Operation
Data is printed while the client still sends data. The amount of available dynamic memory depends on the number of ports in a NetCom Device Server, and the operations active on these ports. Page NetCom 123 WLAN, 423 WLAN,... -
Page 99: Printer Reset
8.2.2. P RINTER ESET Before a new job is sent to the printer, this printer should be in a well known state. On a parallel printer port this is easy to achieve. There is a defined signal to send a »reset« command to the printer. Such a definition is not available for serial printers. -
Page 100: Timing Options
From »Control Panel« open the »Printers and Faxes« windows. Select the »Add a printer« option. The usual »Add Printer« Wizard appears. Click the “Next” button to select the port, where Image 121: Add a printer the printer is attached to. Page NetCom 123 WLAN, 423 WLAN,... -
Page 101: Create New Printer Port
Select the option of »Local Printer …«, but de-select the automatic detection of the printer type as shown below. Image 122: Select Printer Port Click the “Next” button to continue. 8.2.3.1.1. Create new printer port Image 123: Create Printer Port You need to create a new port for the printer, the required type is a »Standard TCP/IP Port«. -
Page 102: Name The New Printer Port
Configure the Printer Port As the last step in creating the printer port for your printer you need to enter some additional information. As the »Device Type« select “Custom”, and open the “Settings …”. Page NetCom 123 WLAN, 423 WLAN,... -
Page 103: Install Printer Driver
Image 125: Properties of Print Server Port Under »Port Settings« select the “LPR” protocol instead of the “Raw” method. The Port Number becomes unavailable, because the standard TCP Port 515 is used in this configuration. Enter the Queue name you configured in the NetCom. -
Page 104: Open The Properties
The button for “Add Port…” opens a dialogue with the possible printer port types. Select “Standard TCP/IP Port” and click on “New Port…”. Image 127: Add Printer Port This will open the Add TCP Port wizard as of section 8.2.3.1.2 above. Proceed as described there. Page NetCom 123 WLAN, 423 WLAN,... -
Page 105: Openvpn™ Encryption
8.3. O VPN™ E NCRYPTION The NetCom Wireless Serial Device Servers offer a special method of encrypted communication. Instead of modifying driver and application programs to support encryption (e.g. by using SSL), the NetCom Servers provide a virtual direct network connection between the computer and the NetCom. -
Page 106: Openvpn Installable Components
This time it is about the »TAP-Win32 Adapter« for OpenVPN™. Just continue with the installation of OpenVPN. As the result of this installation there is a new entry in your Network Image 131: OpenVPN Network Connections folder. Adapter Page NetCom 123 WLAN, 423 WLAN,... -
Page 107: Netcom Openvpn Configuration
Installed is also a bunch of files and programs in your program files folder, and a new service for OpenVPN™. This service is configured to start “Manually”, and is covered in a later section. 8.3.2. N VPN C ONFIGURATION The next task is to configure the NetCom for encrypted communication. It is assumed the NetCom is already configured for the network. -
Page 108: Openvpn Configuration File
So it may be useful to name the file after the serial number of the NetCom. Any name is OK, as long as the extension (the Windows “file type”) remains as “.ovpn”. Page NetCom 123 WLAN, 423 WLAN,... -
Page 109: Start Openvpn™ By Context-Menu
8.3.3.2. Start OpenVPN™ by Context-Menu This is the moment to open the web browser again, and access the Server Configuration of the NetCom. Go to the OpenVPN Parameter section (Image 21), and carefully double check all values. They must match the example used here. If you are sure, change the first parameter “OpenVPN”... -
Page 110: Start Openvpn™ By Command Line
The command of this must be “C:\Program files\OpenVPN\bin\openvpn.exe” --config client.ovpn and the working directory is “C:\Program files\OpenVPN\config”. This link may be placed on the desktop or in the Start Menu. Page NetCom 123 WLAN, 423 WLAN,... -
Page 111: Start Openvpn™ As Windows Service
8.3.3.4. Start OpenVPN™ as Windows Service There are possible configurations, which require a functional connection to the NetCom Server without a user logged in. The driver for Virtual Ports is already loaded, however it does not immediately contact the NetCom Server. This is done when the serial port is opened. Without OpenVPN active there is no network link to the NetCom, so the serial port can not be opened. -
Page 112: Openvpn Without Encryption
Router, this can be a lot of work. Now with OpenVPN™ a single TCP connection must pass through the Router. The configuration is much more simple, the Router does not need to Page NetCom 123 WLAN, 423 WLAN,... -
Page 113: Reconfigure Virtual Serial Ports For Openvpn
have a lot of detailed data. All the different connections required to use the NetCom Server is carried via this single OpenVPN connection in TCP mode. When OpenVPN™ is used this way, probably there is no need for an extra protection by encryption. An encryption of None obviously saves computation resources (i.e. -
Page 114: Tcp/Ip Description
NetCom Device by its MAC- or Ethernet-Address. There should be an internal database, to always provide the same IP-Address to stations with a given MAC. There are free DHCP server programs available for Windows operating system. Page NetCom 123 WLAN, 423 WLAN,... -
Page 115: Automatic Configuration (Apipa)
9.1.3. A (APIPA) UTOMATIC ONFIGURATION A different type of automatic configuration is used by Windows. If the stations are prepared for automatic settings, it will search for a DHCP server (see above). But in SOHO networks this server might not exist. Windows detects this failure, and the computer self-assigns an IP-Address. -
Page 116: Hardware Details
Half Duplex with Echo by RTS 2 wire Off Off Half Duplex without Echo Note 3 Selected by Software Off On Off Off Table 10: Master Switch Configuration of NetCom 123, 423, 823RM and 1623RM Page NetCom 123 WLAN, 423 WLAN,... -
Page 117: Signal Assignment
The NetCom performs the required activation and disabling of the RS 485 transmitter by an internal automatic. It is available in NetCom 123, 423, 823RM and 1623RM models. Note 3: The Master DIP switches configure all serial ports of a NetCom to the same operation mode. -
Page 118: Rs422/485 Electrical Configuration
Without BIAS there will be noise on the cable, and sometimes receivers can not detect the first characters of a beginning communication. Page NetCom 123 WLAN, 423 WLAN,... -
Page 119: Views Of Netcom
123 WLAN Image 141: NetCom 123 WLAN Top and Front Side Here showing NetCom 123 WLAN with the antenna, the serial connector and the configuration switches. The hidden rear side holds the power connector, Reset hole and the Ethernet RJ45. -
Page 120: Netcom 423 Wlan
Image 142: NetCom 423 WLAN Top and Front Side Here showing NetCom 423 WLAN with the antenna, the serial connector and the LEDs. The hidden rear side holds the power connector, Reset hole, the Ethernet RJ45 and the configuration switches. Page NetCom 123 WLAN, 423 WLAN,... -
Page 121: Netcom 823Rm Wlan
10.4.3. 823RM WLAN Image 143: NetCom 823RM WLAN Front Side Here showing NetCom 823RM WLAN with the Ethernet connector and the LEDs, the serial connectors and the Reset pin (in the lower right). Also visible is the WLAN antenna from the rear side. Image 144: NetCom 823RM WLAN Rear Side The rear side holds the power connector and the Master configuration DIP switch. -
Page 122: Troubleshooting Guide
If all this information is displayed as Zero, the IP-settings do not match your computers settings. To correct this, you need administrative privileges for your computer. Start the NetCom Manager as Administrator, and configure correct parameters in the NetCom. Close the Manager program. Page NetCom 123 WLAN, 423 WLAN,... - Page 123 3) Important: The default configuration of NetCom may result in a fixed IP-Address. It will be the same for all connected devices. As a side effect the Manager can not send a dedicated configuration to a certain device. Therefore it is best to connect several NetCom one by one, configure them, connect the next and search for that device.
- Page 124 200 mV. These resistors must not exist on the network more than once. Therefore they are not enabled in the NetCom serial ports. To enable them it is necessary to open the case, and set the Jumpers. Page NetCom 123 WLAN, 423 WLAN,...
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Page 125: Glossary Of Terms
12. G LOSSARY OF ERMS AES: Advanced Encryption Standard The successor of the now insecure DES. AES provides strong and modern encryption, with long keys up to 256 Bit (DES used 56 Bit). APIPA: Automatic Private IP-Addressing scheme self-assign IP-Address network device. - Page 126 Typically they connect more than two networks. The basic task is to decide which route the IP-data must take now. Page NetCom 123 WLAN, 423 WLAN,...
- Page 127 RS-232/V.24: common serial transmission Characters are sent as separate bits, timing is well defined. The medium is copper cable, using typical +/- 12 Volt. Each signal is defined related to a common ground; one wire per signal plus GND. RS-232 is a point-to-point connection. RS-422: Industrial serial transmission (multidrop) A transmission method with balanced signals.
- Page 128 This is the successor of WEP. WPA not only includes better strong encryption, there is also a set of functions to restrict access by means of user authorization, or different hardware parameters (MAC address, distance). Page NetCom 123 WLAN, 423 WLAN,...
- Page 129 Federal Communication Commission Interference Statement This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio...
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