IP920 Wireless Ethernet Bridge/Serial Gateway Revision 0.90, January 11, 2006

Transcription

1 Operating Manual IP920 Wireless Ethernet Bridge/Serial Gateway Revision 0.90, January 11, 2006 Microhard Systems Inc. #17, nd Ave. N.E. Calgary, Alberta T2E 6Z3 Phone: (403) Fax: (403)

2 Warranty Microhard Systems Inc. warrants that each product will be free of defects in material and workmanship for a period of one (1) year for its products. The warranty commences on the date the product is shipped by Microhard Systems Inc. Microhard Systems Inc. s sole liability and responsibility under this warranty is to repair or replace any product which is returned to it by the Buyer and which Microhard Systems Inc. determines does not conform to the warranty. Product returned to Microhard Systems Inc. for warranty service will be shipped to Microhard Systems Inc. at Buyer s expense and will be returned to Buyer at Microhard Systems Inc. s expense. In no event shall Microhard Systems Inc. be responsible under this warranty for any defect which is caused by negligence, misuse or mistreatment of a product or for any unit which has been altered or modified in any way. The warranty of replacement shall terminate with the warranty of the product. Warranty Disclaims Microhard Systems Inc. makes no warranties of any nature of kind, expressed or implied, with respect to the hardware, software, and/or products and hereby disclaims any and all such warranties, including but not limited to warranty of non-infringement, implied warranties of merchantability for a particular purpose, any interruption or loss of the hardware, software, and/or product, any delay in providing the hardware, software, and/or product or correcting any defect in the hardware, software, and/or product, or any other warranty. The Purchaser represents and warrants that Microhard Systems Inc. has not made any such warranties to the Purchaser or its agents MICROHARD SYSTEMS INC. EXPRESS WARRANTY TO BUYER CONSTITUTES MICROHARD SYSTEMS INC. SOLE LIABILITY AND THE BUYER S SOLE REMEDIES. EXCEPT AS THUS PROVIDED, MICROHARD SYSTEMS INC. DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PROMISE. MICROHARD SYSTEMS INC. PRODUCTS ARE NOT DESIGNED OR INTENDED TO BE USED IN ANY LIFE SUPPORT RELATED DEVICE OR SYSTEM RELATED FUNCTIONS NOR AS PART OF ANY OTHER CRITICAL SYSTEM AND ARE GRANTED NO FUNCTIONAL WARRANTY. Indemnification The Purchaser shall indemnify Microhard Systems Inc. and its respective directors, officers, employees, successors and assigns including any subsidiaries, related corporations, or affiliates, shall be released and discharged from any and all manner of action, causes of action, liability, losses, damages, suits, dues, sums of money, expenses (including legal fees), general damages, special damages, including without limitation, claims for personal injuries, death or property damage related to the products sold hereunder, costs and demands of every and any kind and nature whatsoever at law. IN NO EVENT WILL MICROHARD SYSTEMS INC. BE LIABLE FOR ANY INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL, BUSINESS INTERRUPTION, CATASTROPHIC, PUNITIVE OR OTHER DAMAGES WHICH MAY BE CLAIMED TO ARISE IN CONNECTION WITH THE HARDWARE, REGARDLESS OF THE LEGAL THEORY BEHIND SUCH CLAIMS, WHETHER IN TORT, CONTRACT OR UNDER ANY APPLICABLE STATUTORY OR REGULATORY LAWS, RULES, REGULATIONS, EXECUTIVE OR ADMINISTRATIVE ORDERS OR DECLARATIONS OR OTHERWISE, EVEN IF MICROHARD SYSTEMS INC. HAS BEEN ADVISED OR OTHERWISE HAS KNOWLEDGE OF THE POSSIBILITY OF SUCH DAMAGES AND TAKES NO ACTION TO PREVENT OR MINIMIZE SUCH DAMAGES. IN THE EVENT THAT REGARDLESS OF THE WARRANTY DISCLAIMERS AND HOLD HARMLESS PROVISIONS INCLUDED ABOVE MICROHARD SYSTEMS INC. IS SOMEHOW HELD LIABLE OR RESPONSIBLE FOR ANY DAMAGE OR INJURY, MICROHARD SYSTEMS INC.'S LIABILITY FOR ANYDAMAGES SHALL NOT EXCEED THE PROFIT REALIZED BY MICROHARD SYSTEMS INC. ON THE SALE OR PROVISION OF THE HARDWARE TO THE CUSTOMER. Proprietary Rights The Buyer hereby acknowledges that Microhard Systems Inc. has a proprietary interest and intellectual property rights in the Hardware, Software and/or Products. The Purchaser shall not (i) remove any copyright, trade secret, trademark or other evidence of Microhard Systems Inc. s ownership or proprietary interest or confidentiality other proprietary notices contained on, or in, the Hardware, Software or Products, (ii) reproduce or modify any Hardware, Software or Products or make any copies thereof, (iii) reverse assemble, reverse engineer or decompile any Software or copy thereof in whole or in part, (iv) sell, transfer or otherwise make available to others the Hardware, Software, or Products or documentation thereof or any copy thereof, except in accordance with this Agreement. ii IP 920 Operating Manual

3 Regulatory Requirements WARNING To satisfy FCC RF exposure requirements for mobile transmitting devices, a separation distance of 23 cm or more should be maintained between the antenna of this device and persons during device operation. To ensure compliance, operations at closer than this distance is not recommended. The antenna used for this transmitter must not be co-located in conjunction with any other antenna or transmitter. WARNING This device can only be used with Antennas listed in Appendix E. Please Contact Microhard Systems Inc. if you need more information or would like to order an antenna. WARNING MAXIMUM ERP FCC Regulations allow up to 36 dbm effective radiated power (ERP). Therefore, the sum of the transmitted power (in dbm), the cabling loss and the antenna gain cannot exceed 36 dbm. WARNING EQUIPMENT LABELING This device has been modularly approved. The manufacturer, product name, and FCC and Industry Canada identifiers of this product must appear on the outside label of the end-user equipment. SAMPLE LABEL REQUIREMENT: FCCID: NS904P10 IC: 3143A-04P10 This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received including interference that may cause undesired operation. IP920 Operating Manual iii

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5 Contents CONTENTS...III HISTORY...V TABLES AND FIGURES...VII TABLES...VII FIGURES...VII 1. INTRODUCTION PRODUCT OVERVIEW FEATURES ABOUT THIS MANUAL ELECTRICAL/PHYSICAL CONNECTORS INDICATORS LED OPERATION VSWR ALARM USER INTERFACES OVERVIEW NOTATION SERIAL CONSOLE WEB BASED USER INTERFACE NETWORK MANAGEMENT CONFIGURATION OVERVIEW MAIN MENU SYSTEM CONFIGURATION NETWORK CONFIGURATION Local IP Config NTP Server Config DHCP Server Config Bridge Config SNMP Agent Config RADIO CONFIGURATION COM1 AND COM2 CONFIGURATION Serial Port Settings Serial Port Protocols...31 TCP Client TCP Server TCP Client/Server UDP Point to Point UDP Point to Multipoint (P) UDP Point to Multipoint (MP) UDP Multipoint to Multipoint SECURITY CONFIGURATION Administrator Password Upgrade Password Wireless WEP Encryption SYSTEM INFORMATION SYSTEM TOOLS Firmware Upgrade...39 Package Upgrade from webui Package Upgrade from Command Line FTP Recovery from Command Line FTP Parameter Change through Command Line FTP IP920 Operating Manual: Contents iii

6 4.8.2 Reset Radio to Defaults Reboot System Reset System to Default INSTALLATION OVERVIEW ESTIMATING THE GAIN MARGIN INSTALLING EXTERNAL CABLES, ANTENNAS AND LIGHTNING ARRESTORS A. SERIAL INTERFACE...51 B. RS485 WIRING wire RS wire RS C. MOUNTING DIMENSIONS...55 D. TECHNICAL SPECIFICATIONS...57 E. APPROVED ANTENNAS...59 F. GLOSSARY...61 iv IP920 Operating Manual: Contents

7 History Revision Date Action FW Rev. Note Modified V Corrections Modified V CTS Framing added COM multipoint to multipoint Modified V Added Radio Description Added STP Control Modified V Change Parameter via FTP FTP Firmware Upgrade MAC Binding described WEP Security described SNMP described Channel Mode added on COM1 +++ described Modified V Created V0.5.0 IP920 Operating Manual: History v

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9 Tables Tables and Figures Table 1 RS-232 Pin Assignment...5 Table 2 RS-422 Pin Assignment...5 Table 3 RS-485 Pin Assignment...5 Table 4 Diagnostic Port Pin Assignment...6 Table 5 Power Supply...6 Table 6 LED Operation...8 Table 7 SYS LED Operation...8 Table 8 RSSI mode operation...9 Table 9 Output Power...26 Table 10 Path Loss...46 Table 11 Cable Loss...47 Table 12 Technical Specifications...57 Figures Figure 1 Connectors and Indicators...4 Figure 2 textui Screen Shot...13 Figure 3 webui Authentication...14 Figure 4 webui Screen Shot...14 Figure 5 System Configuration...16 Figure 6 Network Configuration...18 Figure 7 Local IP Config...18 Figure 8 NTP Server Config...19 Figure 9 DHCP Server Config...20 Figure 10 NTP Server Config...21 Figure 11 SNMP Agent Config...22 Figure 12 Radio Configuration...24 Figure 13 Serial Port Configuration...29 Figure 14 CTS Output Data Framing...30 Figure 15 Change Password for Admin...35 Figure 16 Change Password for Upgrade...36 Figure 17 WEP Encryption...37 Figure 18 System Information...38 Figure 19 System Tools...39 Figure 20 Command Line Package Upgrade...40 Figure 21 Command Line Recovery...41 Figure 22 Command Line Parameter Loading...42 Figure 23 Gain Calculation...45 Figure 24 System Deployment...46 IP920 Operating Manual: Tables and Figures vii

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11 1. Introduction 1.0 Product Overview The IP920 is a high-performance wireless ethernet bridge and serial device gateway. When used properly very long distance communication at very high speeds can be accomplished. The IP920 operates in the MHz ISM band, and uses frequency-hopping spread-spectrum technology to provide reliable wireless ethernet bridge functionality to extend LAN network to remote locations; it also is capable of facilitating a IP/Ethernet gateway for serial devices. The small-size and superior RF performance of this product makes it ideal for many applications. Typical uses for this modem include: SCADA Remote Telemetry Surveillance Traffic Control Industrial Controls Remote Monitoring Fleet Management GPS Wireless Video Robotics Security Display Signs Railway Signaling Many others While a pair of IP920 modules can link two terminal devices ( point-topoint operation), multiple modules can be used together to create a network of various topologies, including point-to-multipoint and repeater operation. Multiple independent networks can operate concurrently, so it is possible for unrelated communications to take place in the same or a nearby area without sacrificing privacy or reliability.

12 1.1 Features Key features of the IP920 include: Transmission within a public, license-exempt band of the radio spectrum 1 this means that it can be used without access fees (such as those incurred by cellular airtime); Transparent, low latency link providing reliable wireless IP/Ethernet communication Bring virtually all PLCs, RTUs, and serial devices through RS232, RS422 and RS485 interface to IP network Industrial temperature specifications Supports point-to-point, point-to-multipoint, Store and Forward Repeater Maximum allowable transmit power, (1W) 32-bit CRC and retransmission on demand Easy to manage through text-based user interface; web-based interface and SNMP MHz, which is license-free within North America; may need to be factory-configured differently for some countries. 2 IP920 Operating Manual: Chapter 1 Introduction

13 1.2 About this Manual This manual has been provided as a guide and reference for installing and using IP920 wireless modem modules. The manual contains instructions, suggestions, and information which will help you to set up and achieve optimal performance from your equipment using the IP920 module. It is assumed that users of the IP920 module have either system integration or system design experience. Throughout the manual, you will encounter not only illustrations that further elaborate on the accompanying text, but also several symbols which you should be attentive to: Caution or Warning: Usually advises against some action which could result in undesired or detrimental consequences. Point to Remember: Highlights a key feature, point, or step which is worth noting, Keeping these in mind will make using the IP920 more useful or easier to use. Tip: An idea or suggestion is provided to improve efficiency or to make something more useful. IP920 Operating Manual: Introduction 3

14 2. Electrical/Physical 2.0 Connectors The IP920 connects to the host equipment through a standard DB9 serial port or RS485/422 interface. All connectors and indicators are illustrated in Figure 1 COM2 Microhard Systems Inc. CFG TX RX SYS RSSI a. Front Panel COM1 ETHERNET RS485/ TxB TxA RxB RxA GNG Vin + b. Back Panel Figure 1 Connectors and Indicators The interface connectors and indicator lights are described below: 4 IP920 Operating Manual: Chapter 2 Electrical/Physical

15 COM1 RS-232 Port (DCE). This port is used to interface the IP920 to a DTE device and operates at 300 to 230,400 bps. The levels are active high RS- 232 levels, and include (See Appendix A for a complete description): Table 1 RS-232 Pin Assignment Pin No. Name Description I/O 1 DCD Data Carrier Detect O 2 RxD Receive Data O 3 TxD Transmit Data I 4 DTR Data Terminal Ready I 5 Gnd Ground 6 DSR Data Set Ready O 7 RTS Request to Send I 8 CTS Clear to Send O RS-422/485 Port Alternatively, this port is used to interface the IP920 to a DTE device with RS-422/485 interface. Table 2 RS-422 Pin Assignment Pin No. Name Description I/O 1 TxB (D+) Non-inverting Driver Output O 2 TxA (D-) Inverting Driver Output O 3 RxB (R+) Non-inverting Driver Input I 4 RxA (R-) Inverting Driver Input I Table 3 RS-485 Pin Assignment Pin No. Name Description I/O 1 D+ Non-inverting Driver Output 2 D- Inverting Driver Output 3 Interconnect to pin 1 4 Interconnect to pin 2 IP920 Operating Manual: Chapter 2 Electrical/Physical 5

16 COM2 can be used as console port or data port. Table 4 Table 4 Diagnostic Port Pin Assignment Pin No. Name Description I/O 1 NC Do Not Connect NC 2 RxD Diagnostic Receive Data I 3 TxD Diagnostic Transmit Data O 4 NC Do Not Connect NC 5 Gnd Ground 6 NC Do Not Connect NC 7 NC Do Not Connect NC 8 NC Do Not Connect NC ETHERNET Ethernet port is a standard RJ-45 port. A straight through CAT- 5 cable should be used when connecting to a Ethernet hub, on the other hand, a crossover CAT-5 cable should be used when IP920 is connected to a DTE device, a computer for example. Antenna Connector - The IP920 uses a reverse polarity TNC connector. Microhard Systems can provide external cabling and antennas for applications in which the standard Rubber Duck antenna is not suitable. Power Supply Power should be supplied via pin 5 and 6 of plug-in connector Table 5 Power Supply Pin No. Name Description 5 Vin - Power ground and Signal ground (GND) 6 Vin + 8 to 30V DC power supply 6 IP920 Operating Manual: Chapter 2 Electrical/Physical

17 2.1 Indicators With rubber ducky antennas, it is normal that alarm LED illuminates sometimes. Concerns should only be raised in real installations. Alarm LED (Amber) located on COM2 connector. It is illuminated when the load impedance doesn t match the transmitter impedance. Generally speaking, there may be problem in the antenna system MHX Status LED (Green) located on COM2 connector. It is illuminated when the MHX core module is present and powered. RX/Sync LED Indicates the modem is synchronized and/or is receiving valid packets of data. See Section 2.2 for complete LED details. TX LED Indicates the modem is transmitting data over the air. See Section 2.2 for complete LED details. SYS LED Indicates status of the system. See Section 2.2 for complete LED details. Receive Signal Strength Indicator (RSSI) As the signal strength increases, the number of active RSSI LED s increases, starting with the furthest left. See Section 2.2 for complete LED details. CFG Button Holding this button while powering on will boot the unit into flash file system recovery mode. Default IP address recovery is assigned to a static IP address: IP920 Operating Manual: Chapter 2 Electrical/Physical 7

18 2.2 LED OPERATION LED functionality is dependent on the mode of operation. Table 6 explains LED operation for the various modes. Table 6 LED Operation LED MODE RX/Sync TXMode RSSI1,2,3 Power Up OFF OFF OFF Configuration Mode OFF OFF OFF Master ON while receiving valid data packets from remotes and repeaters in the network ON RSSI mode based on all received packets 1 See Table 8 Repeater During Sync. Acquisition OFF OFF alternating 300ms ON Repeater When Synchronized ON for first portion of hop interval ON for second portion of hop interval RSSI mode based on packets received from Remotes 2 See Table 8 Remote During Sync. Acquisition OFF OFF alternating 300ms on Remote When Synchronized ON ON when transmitting a packet RSSI mode based on packets received from the Repeater or Master with which it communicates See Table 8 Table 7 SYS LED Operation Cycling power during system upgrading will corrupt flash file system. The system will not boot properly. System can only be recovered with recovery procedure. SYSTEM MODE Normal Mode Recovery Mode Loading SYS ON Fast Blink Slow Blink Upgrading Slow Blink DO NOT cycle power when system is upgrading. 1 Master only updates its RSSI after received packets from remotes/repeaters 2 If Remotes have been silent for 2 seconds, repeater will show its RSSI on packets received from the Master 8 IP920 Operating Manual: Chapter 2 Electrical/Physical

19 Signal strength, which is also reported in Register S123, is calculated based on the last four valid received packets with correct CRC, and represented by RSSI1, 2 and 3. For remotes, packets are received on every single hop either from a repeater, or the master. When calculating RSSI, the master takes into consideration all packets received from remotes and repeaters. Repeaters and remotes only transmit back to the master when they have information to send. Therefore, if no data is coming back to the master then RSSI will never get updated at the master, and the LED s will be off. Table 8 RSSI mode operation Link Possibility RSSI1 RSSI2 RSSI3 No Link Scanning Poor BLINK OFF OFF Satisfactory ON OFF OFF Good ON BLINK OFF Very Good ON ON OFF Strong ON ON BLINK Excellent ON ON ON 2.3 VSWR Alarm The IP920 provides the user a very special indicator on the diagnostic port, the VSWR alarm. This yellow LED will be illumined if there is a significant impedance mismatch between the transmission line and its load, i.e. bad antenna system or bad connections. Check the antenna and the cables should the alarm go off. IP920 Operating Manual: Chapter 2 Electrical/Physical 9

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22 3. User Interfaces 3.0 Overview The IP920 modem can be easily configured to meet a wide range of needs and applications. There are three approaches which can be used to access and configure an IP Serial console. COM2 is assigned to system console by default. 2. Web user interface. One can access the system through an embedded web server inside the IP920 once the IP address is determined. 3. SNMP network management. Simple Network Management Protocol (SNMP) is another alternative for a network administrator to access the IP920 system wide. 3.1 Notation In textui and webui, different notations can tell what to expect or what to do, : An item with colon is an item that can be edited or is just for display; An item with is an item that has submenu or multiple choices. For security purpose, there is no way to reset password into a default password, therefore system will become inaccessible if the password is lost. 3.2 Serial Console COM2 is used as a system console by default, it can also be used as a second data port if desired. When used as a console port, the port is configured as follows, Baud Rate: 115,200 Data Bits: 8 Parity: None Stop Bits: 1 Flow Control: None Make sure the terminal software has same settings as shown above. The textui is designed to adapt to any type of terminal, however a VT100 or ANSI terminal type is recommended for better operation. User name and password are needed to login to the system. Only the administrator can login to the system to access the textui through the console. Default user name and password are as follows, IPx20 Login: admin Password: admin Password can be changed via user interface. Note that user name and password are case sensitive. For security purpose, there is no way to reset password into a default password, therefore system will become inaccessible if the password is lost. 12 IP920 Operating Manual: Chapter 3 User Interfaces

23 If no password is supplied within 60 seconds after user name is typed in, the login session will timeout and prompt with login string again. Figure 2 is a typical screen shot when HyperTerminal is employed as the terminal program. Figure 2 textui Screen Shot In textui, typing the leading letter of a menu item can allow you to start editting a parameter or switch to a submenu. ESC is used to exit from a submenu and back up one step of the hierarchy. Q is used to quit from textui. When a parameter is modified in a submenu, U is used to apply change(s) and V to give up changes just made. IP920 Operating Manual: Chapter 3 User Interfaces 13

24 3.3 Web Based User Interface To make life easier, webui will be used in following sections instead of a web based user interface. Once an IP address is assigned to an IP920 unit, dynamically or statically, webui can be accessed using any web browser, such as IE, Netscape and Mozilla, etc. from a host machine. If the IP address is , simply typing in the following syntax on the address bar in a favorite browser can bring up the webui. An IP920 discovery program can be found from website: This program helps to find a dynamic IP address associated to a IP920. Before the main page show up, user name and password are needed to login to the system. Default user name and password are the same as textui. For security purpose, DO NOT let the web browser remember user name and password. Figure 3 webui Authentication Figure 4 webui Screen Shot 14 IP920 Operating Manual: Chapter 3 User Interfaces

25 3.4 Network Management IP920 has a built-in SNMP agent to facilitate Simple Network Management Protocol V1, V2 and V3. All objects specific to IP920 are hosted under and the private enterprise number: IP920 Operating Manual: Chapter 3 User Interfaces 15

26 4.0 Overview 4. Configuration A similar menu hierarchy applies to all three user interfaces. The following description is based on mainly webui. Each function should be the same among the three approaches unless stated otherwise. 4.1 Main Menu The following main menu is the root menu which navigates to the submenus or to the system parameters. System Configuration Network Configuration Radio Configuration COM1 Configuration COM2 Configuration Security Configuration System Information System Tools 4.2 System Configuration System configuration gives the ability to setup system time statically or allow IP920 to synchronize time with a NTP server. There is no backup battery to support system clock. The system clock starts from default time upon system reboot, including power on reboot or software reboot. Reconfiguration is needed upon reboot if correct system clock is desired. Figure 5 System Configuration Radio Description: A simple text description can be placed here to describe a unit. Up to 30 characters are allowed for this description. The description will be part of the result of discovery program. 16 IP920 Operating Manual: Chapter 4 Configuration

27 UTC Time Offset defines whether the offset system is ahead or behind UTC time. A + indicates local time is ahead of UTC time and a - indicates local time is behind UTC time. Before clicking on Synchronizes with SNTP Server, SNTP server should have already been set to proper internet time server or network timer server. See for details. IP920 Operating Manual: Chapter 4 Configuration 17

28 4.3 Network Configuration Network configuration allows the administrator to configure all network related settings, including local network settings, network time (NTP) server settings, DHCP server settings and SNMP agent settings. Figure 6 Network Configuration Both Ethernet MAC address and Wireless MAC address are also shown in the page. This information can sometimes be useful for the administrator to setup the network or for troubleshooting Local IP Config This is the place where the local network character is determined. The local network configuration address is a basic for this IP920 node to communicate with any other network devices through a LAN Ethernet port as well as remotely through a radio link. Figure 7 Local IP Config 18 IP920 Operating Manual: Chapter 4 Configuration

29 IP Address Mode: defines whether an IP920 will get an IP address statically or dynamically. When static is selected, the following three addresses have to be specified manually. Otherwise, when dhcp is selected, the following 3 items can not be edited and will be updated by the system with correct value after a valid IP address is acquired from a DHCP server inside the network. Make sure a DHCP server is accessible prior to changing IP Address Mode to dhcp. IP Address: Editable when IP Address Mode is set to static. Only a valid static IP address is acceptable. IP Subnet Mask: Editable when IP Address Mode is set to static. Only a valid static subnet mask address is acceptable. IP Gateway: Editable when IP Address Mode is set to static. Only a valid static gateway address is acceptable NTP Server Config... This is where to setup the NTP server for the local IP920 to synchronize its clock with. Figure 8 NTP Server Config NTP Server Status: NTP service can be enabled or disabled. When enabled, this local IP920 will attempt to synchronize its clock with a specific NTP server. To save system resources, it should be disabled if NTP server is not accessible or this service is not desired. NTP Server (IP/Name): Both IP address or domain name can be used to specify a NTP server. If NTP service is desired, the network has to be designed so that this local IP920 has internet access or it can access the NTP server that resides inside a LAN. IP920 Operating Manual: Chapter 4 Configuration 19

30 This service could conflict with an existing DHCP server in a wired LAN network. Caution must be taken when this service is desired and enabled DHCP Server Config... IP920 can be configured to provide DHCP server service for a whole LAN network section, including wired and wireless. Normally, one can enable a DHCP server on a master IP920 so that it can assign dynamic IP addresses to all the remotes wirelessly. It can also assign a dynamic IP address to a host machine which is connected through a LAN port. This machine can be used as a maintenance station for the whole radio network. The DHCP server also manages up to 5 MAC address bindings. With MAC address binging, the DHCP server reserves certain IP addresses for specified MAC addresses which connect to the network remotely or locally. Figure 9 DHCP Server Config Server Status: DHCP service can be enabled or disabled. It is disabled by default. When enabled, it can assign an IP address for both the LAN port and the radio network. Server Subnet: IP netmask to be assigned along with the IP address in response to a DHCP request. [ ] Starting Address: Lower boundary of IP address pool to be provided by this server. [ ] Ending Address: Upper boundary of IP address pool to be provided by this server. [ ] DNS Address: Domain Name Server address to be provided by this server. 20 IP920 Operating Manual: Chapter 4 Configuration

31 WINS Address: Windows Internet Naming Service server address to be provided by this server. New Binding MAC: a valid MAC address which gets the same IP address when requesting from this DHCP server. New Binding IP: a valid IP address will be assigned to the specific MAC address. Add: This action will add a new binding into the list temporarily. Delete: a selected MAC binding can be deleted from the list. All the parameters take effective only when the page is submitted Bridge Config... Spanning Tree Protocol (STP) can be enabled or disabled here to prevent undesirable loops in the network Figure 10 NTP Server Config If multiple IP920 will be directly connected to a network, STP should be enabled. STP should be disabled if only the master IP920 is connected to a network and the other units are connected to the network indirectly. Disabling STP can reduce network traffic to some extent. IP920 Operating Manual: Chapter 4 Configuration 21

32 4.3.5 SNMP Agent Config... Figure 11 SNMP Agent Config SNMP Operation Mode: SNMP agent can be disabled or enabled. If disabled, no SNMP service is provided from the device. When enabled, this SNMP agent can handle SNMPv1, SNMPv2c and SNMPv3. Read Only Community Name: This gives the agent ability to handle request from SNMPv1 and SNMPv2c clients. This community name has only read priority Read Write Community Name: This gives the agent ability to handle request from SNMPv1 and SNMPv2c clients. This community name has read/write priority. SNMP V3 User Name: Defines user name for SNMPv3 V3 User Read Write Limit: Defines accessibility of SNMPv3, can choose from read-only or read-write priority. If "read-only" is selected, the SNMPv3 user only can read information; if "read-write" is selected, the SNMPv3 user can read and write (set) variables. V3 User Authentication Level: Defines SNMPv3 user's authentication level. Choose from, noauthnopriv: don t need authentication and encryption. AuthNoPriv: need authentication but don t need encryption. AuthPriv: need authentication but don t need encryption. 22 IP920 Operating Manual: Chapter 4 Configuration

33 V3 Authentication Password: SNMPv3 user's authentication password. This is only valid when V3 User Authentication Level is set to AuthNoPriv or AuthPriv. V3 Privacy Password: SNMPv3 user's encryption password. This is only valid when V3 User Authentication Level is set to AuthPriv. SNMP Trap Version: Select which version of trap will be sent in case failure or alarm. Auth Failure Traps: If select "Enable", an authentication failure trap will be generated upon authentication failure. Trap Community Name: The community name can receive traps. Trap Manage Host IP: Defines a host IP address where traps will be sent to. IP920 Operating Manual: Chapter 4 Configuration 23

34 4.4 Radio Configuration All radio related parameter modifications take place under this submenu. Operating mode, output power, wireless link rate, radio network topology, roaming and other radio network parameters can be modified here. Figure 12 Radio Configuration Operating Mode: A radio can be configured into one of the three modes, Master, Repeater and Remote. Master In any given network, there is always only one Master. All other units should be configured as either Remotes or Repeaters. When defined as a Master, the modem broadcasts data to all Remotes and Repeaters or talks to a specific remote, based on the network type. The master radio controls synchronization of the whole radio network. Remote Up to Remotes may exist in a network, all of which communicate with the common Master (either directly or via Repeater(s)). Remotes cannot directly communicate with one other. The Master initiates communications by sending a broadcast message to all Remotes. After synchronized with the Master unit, Remote(s) can transmit data on a certain channel for a certain time period determined by the Master unit. Repeater A more precise title would be Repeater/Remote, because a Repeater also has much of the same functionality as a Remote. A terminal can be connected at the Repeater location and communicate with the Master terminal. The presence of one Repeater in a network automatically degrades system throughput by half. Additional Repeaters, regardless of the quantity, do not diminish system throughput any further. The Repeater(s) store any data from the Master or upper stream repeater and forward to the down stream Repeater or remote, vice versa 24 IP920 Operating Manual: Chapter 4 Configuration

35 Network Name: This is a unique ID for a radio network. All units inside the same network should have the same network name. Network name is also a factor used by the system to generate the hopping pattern. This network name is also a seed to generate an encryption key to encrypt the data over air. Link Rate: is the speed and optimization method for which modules will communicate over the RF link. The possible value is: *345kbps Unit Address: editable on remote and repeater. The Unit Address identifies an individual unit in the radio network. Unit Address 1 is reserved for the Master unit. The Unit Address uniquely identifies each Remote and Repeater from one another. Each unit in a multipoint system must have a unique Unit Address ranging from 2 to Do not use a Unit Address more than once within the same Network. This is required because the Master must be able to acknowledge each unit individually, based on the Unit Address. RF Output Power: The Output Power Level determines at what power the IP920 transmits. The IP920 s sensitive receiver can operate with very low power levels, so it is recommended that the lowest power necessary is used; using excessive power contributes to unnecessary RF pollution. The allowable settings are from 100 mw to 1000 mw. Ideally, you should test the communications performance between units starting from a low power level and working upward until the RSSI is sufficiently high and a reliable link is established. The conditions will vary widely between applications, the output power settings can be calculated based on following information. Transmitter antenna gain Cable loss Effective radiated power (ERP) requirement by FCC Regulations Power Setting = 36 Antenna Gain Cable Loss The power setting must be no more than the above calculation value. Any higher is a violation of FCC rules. See IMPORTANT warning to follow. IP920 Operating Manual: Chapter 4 Configuration 25

36 Table 9 Output Power Power Setting (dbm) Approx. Output Power (mw) IMPORTANT: FCC Regulations allow up to 36 dbi effective radiated power (ERP). Therefore, the sum of the transmitted power (in dbm), the cabling loss and the antenna gain cannot exceed 36 dbi. 1 mw = 0 dbm 10 mw = 10 dbm 100 mw = 20 dbm 1000 mw = 30 dbm For example, when transmitting 1 Watt (30 dbm), the antenna gain cannot exceed = 6 dbi. If an antenna with a gain higher than 6 dbi were to be used, the power setting must be adjusted appropriately. Microhard Systems Inc. limits the MHX 920 s transmitted power to 100mW for all units purchased with antennas with gain above 6dBi. Retransmissions: In point-to-multipoint mode, the Master will retransmit each data packet exactly the number of times defined by the Packet Retransmissions parameter. The remote will retransmit its packet until the retransmission limit is reached or an acknowledgement is received. If the limit is reached, the module will give up and discard the data. In point-to-point mode, the Unit will only retransmit the packet if it does not get an acknowledgement from its counterpart. In this case, the unit will continue to retransmit until an acknowledgement is received, or the retransmission limit is reached. When the retransmission limit is reached, the unit discards the packet. Recipients of the packet will discard any duplicates. The valid settings for this parameter are 0 to 255 retransmissions. 26 IP920 Operating Manual: Chapter 4 Configuration

37 Network Type: defines radio network topology. *Point-to-Multipoint (PMP) network Point-to-Point (PP) network Peer to Peer (P2P) network Everyone to Everyone (E2E) network In a point to multipoint (PMP) network, the master unit broadcasts packets to every remotes/repeaters in the network. Destination address is set to automatically on the master for PMP network. In a point to point (PP) network, the master only communicates with one remote whose unit address matches the destination address of this master unit. The destination address needs to be set properly on the master unit of a point-to-point network. A peer to peer (P2P) would allow remotes in the network to communicate with each other. The destination address should be set to the unit address of its peer An Everyone to Everyone (E2E) would allow all remotes in the network to communicate with each other. The destination address is set to on all units inside an E2E network. Roaming Address: Only valid on remote/repeater units. This parameter defines which upstream unit this unit should synchronize with. If a particular unit address is set, this unit will only try to synchronize with that specific unit. Unit address 1 stands for the Master in the network; Other unit address (2~65534) specifies an upstream repeater; Broadcast address tells this unit to find an available upstream unit (master or repeater) and synchronize with it. This unit will look for another unit in case of synchronization loss. Repeater: can only be seen on a master unit. It tells the master if repeater(s) exists in a radio network. Optimization: can only be seen on a master unit. It tells the master to optimize system in three different ways, High Throughput/Balanced/Low Latency. High Throughput *Balanced Low Latency When throughput is the priority in an application, High throughput should be chosen; when a system has short packets and latency requirement is the priority, Low Latency should be selected; otherwise, the selection of Balanced is a compromise of throughput and latency. IP920 Operating Manual: Chapter 4 Configuration 27

38 4.5 COM1 and COM2 Configuration Serial device server can be configured under these two submenus. Normally, serial device server is used to bring serial device data into a LAN network through TCP, UDP or multicast. When configured properly, data from a serial port on one IP920 could output to the serial port on another IP920. Settings for two serial ports are mostly the same except minor differences. COM1 is a dedicated data port and can only be configured for data communication purpose. COM2 is setup as a system console by default and can be used as a second data communication port. There is no hardware flow control available on COM2. This section will mainly describe how to setup COM1. 28 IP920 Operating Manual: Chapter 4 Configuration

39 Figure 13 Serial Port Configuration Serial Port Settings Port Status: serial port server can be enabled or disabled. The COM2 is normally disabled and used for system console. When data communication is desired on COM2, this setting should be set to enabled. Escape sequence +++ can be used to escape from data mode and to go back into console mode. Please note, +++ needs to be issued at the right baud rate to make the port switch modes. Channel Mode: determines what serial interface shall be used to connect to external serial devices, RS232, RS422 (4-wire) or RS485 (2-wire). Only COM1 can be configured to use different serial channel node. DB9 port will be disabled when RS422 or RS485 mode is selected. Baud Rate: baud rate used by the server to receive from or transmit to serial port. Baud rate can be set from 300bps to 230,400 bps. Data Format: defines serial port framing format, including data bits, parity, and stop bits. For example, 8N1 means 8 data bits, No parity, and 1 stop bit. IP920 Operating Manual: Chapter 4 Configuration 29

40 Flow Control: To make serial port data communication reliably, hardware handshaking can be used. If a serial device doesn t support hardware handshaking, flow control should be set to None. When CTS Framing is selected, IP920 uses CTS signal to gate output data on serial port. The following figure shows timing diagram of CTS output data framing. CTS RXD Data leaving IP920 Pre-Data Delay (ms) Post-Data Delay (ms) Figure 14 CTS Output Data Framing Pre-Data Delay (ms): See Figure 14. Post-Data Delay (ms): See Figure 14. Data Mode: defines serial data output framing. Serial port service adds time gap between data frames to comply with MODBUS protocol when data mode is set to MODBUS. At least a 3.5 character time gap is inserted. This value can be modified by the Character Timeout setting. On the other hand, the serial server will output serial data to the serial port as quick as possible in transparent mode; no delays will be inserted between frames. 30 IP920 Operating Manual: Chapter 4 Configuration

41 Character Timeout: in MODBUS mode, it tells the serial server when to wrap up incoming data from the serial port and to start to transmit. Frames will be marked as bad frames if the time gap between frames is greater than 1.5 chars, but less than the character timeout. Serial server also uses this parameter to determine the time gap inserted between frames. It is measured in characters and related to baud rate. For example, if baud rate is set to 9600, it takes about 1ms to transmit one character. When character timeout is set to 4, timeout value is set to 4ms. When calculated time is less than 3.5 chars, the server will set character timeout to 3.5 chars. When the baud rate is greater than 19200bps, the minimal character timeout is set to 750us internally. Maximum Packet Size: defines the buffer size the serial server uses to receive data from the serial port. When the server detects character timeout or the buffer is full, it packetizes the received frame and transmits Serial Port Protocols The serial server can be set to use one of the following protocols to transmit serial port to a remote unit. TCP Client TCP Server TCP Client/Server UDP Point to Point UDP Point to Multipoint (P) UDP Point to Multipoint (MP) TCP Client When TCP Client protocol is selected, IP920 takes initiative to find and connect to a remote TCP server when data is received from its serial port. The TCP connection is terminated by this unit when the data session is done and connection timeout has expired. If no TCP connection can be established, serial port data is dropped. Remote Server Address: IP address of a TCP server which is ready to accept serial port data through a TCP connection. It might be sitting on a LAN network server. Remote Server Port: a TCP port the remote server listens to. It allows a TCP connection to be created by a TCP client to carry serial port data. Outgoing Connection Timeout (s): tells IP920 when to terminate the TCP connection if the connection is in idle state. IP920 Operating Manual: Chapter 4 Configuration 31

42 TCP Server When TCP Server protocol is selected, IP920 is put into a passive mode. It listens on a specific TCP port to accept an incoming TCP connection from a remote station, for example a work station inside a LAN network. Once a connection is established any received data from serial port is passed on to the remote TCP client; otherwise serial data is simply dropped. Local Listening Port: a TCP port the remote server listens to. It allows a TCP connection to be created by a TCP client to carry serial port data. Incoming Connection Timeout (s): tells the TCP server when to terminate the TCP connection if the connection is in idle state. 32 IP920 Operating Manual: Chapter 4 Configuration

43 TCP Client/Server When TCP Client/Server protocol is selected, IP920 is set in a combined mode. It can take initiative to create a TCP connection when data is received from a serial port and no TCP connection already exists; it can also passively wait for a remote TCP client to create a TCP connection and pass serial data back and forth. See TCP Client and TCP server for details. UDP Point to Point When UDP Point to Point protocol is selected, IP920 transmits serial data to a specific point with UDP packets. It also accepts UDP serial data from that particular node. UDP Point to Point Remote IP Address: a remote IP address to which UDP packets are sent by the IP920 when data is received from a serial port. Remote Port: a remote UDP port to which UDP packets are sent by the IP920 when data is received from serial port. Listening Port: a UDP port the IP920 unit listens to. UDP packets received on this port are transmitted to the local serial port. MP P MP MP UDP Point to Multipoint UDP Point to Multipoint (P) This protocol is set on the unit who sends multicast UDP packets. Normally, this unit is the master radio of a network. Multicast IP Address: a valid multicast address this unit uses to send multicast UDP packets upon receiving data from serial port Multicast address is a good example. Multicast Port: a UDP port this base station sends UDP packets to. Multipoint stations should listen to this port in order to receive multicast packets. Listening Port: a UDP port the base station uses to accept data from multiple remote units. Time to Live: TTL for multicast packets. UDP Point to Multipoint (MP) This protocol is selected on the units who receive multicast UDP packets. Normally, this protocol is set on remote units. Remote IP Address: a remote IP address to which UDP packets are sent by this IP920 when data is received from serial port. Normally this is set to the IP address of the Master unit. Remote Port: a remote UDP port to which UDP packets are sent by this IP920 when data is received from serial port. Normally this port number matches Listening Port of a UDP Point to Multipoint (P), typically the master. IP920 Operating Manual: Chapter 4 Configuration 33

44 Multicast IP Address: a valid multicast address that this unit uses to listen to multicast UDP packets sent by a UDP Point to Multipoint (P) Multicast address is a good example. Multicast Port: a UDP port that this unit used to listen to multicast UDP packets sent by UDP Point to Multipoint (P). UDP Multipoint to Multipoint Multicast IP Address: a valid multicast address this unit uses to send multicast UDP packets upon receiving data from serial port Multicast address is a good example. Multicast Port: a UDP port this base station sends UDP packets to. Multipoint stations should listen to this port in order to receive multicast packets. Listening Multicast IP Address: a valid multicast address that this unit uses to listen to multicast UDP packets sent by a UDP Multipoint to Multipoint Multicast address is a good example. Listening Multicast Port: A UDP port that this unit used to listen to multicast UDP packets sent by UDP Multipoint to Multipoint. Time to Live: TTL for multicast packets. 34 IP920 Operating Manual: Chapter 4 Configuration

45 4.6 Security Configuration This section describes security measures built into IP920. These security measures cover from wireless data traffic security to device management security Administrator Password To keep a system secure, the administrator password should be modified to a different password instead of using the factory default password. This menu gives the ability to change the password for the administrator. Figure 15 Change Password for Admin IP920 Operating Manual: Chapter 4 Configuration 35

46 4.6.2 Upgrade Password Upgrade password protects IP920 units from being upgraded (package upgrade) by unauthorized personel. Default password should be avoided when system is deployed to make the units more secure. Figure 16 Change Password for Upgrade Wireless WEP Encryption Network traffic over air can be encrypted by Wired Equivalent Privacy (WEP) encryption algorithm. WEP encryption is disabled by default to keep overhead minimum, it should be enabled if over air encryption is required. When enabled, more protocol overhead is added on the packets being transmitted; therefore a minor throughput decrease shall be expected. 36 IP920 Operating Manual: Chapter 4 Configuration

47 Figure 17 WEP Encryption WEP Status: Indicates WEP encryption is enabled or disabled. WEP Key Type: 64 bit encryption key or 128 bit encryption can be used to secure wireless data traffic. Compare to 64 bit encryption, 128 bit encryption is stronger, but adds more overhead on wireless traffic. Key Generation: WEP key1 to key4 can be generated to the system upon Key Phrase when Key Generation is checked. Otherwise WEP key1 to key4 can be chosen by user. Key Phrase: A seed to automatically generate a selected WEP Key if Key Generation is checked. Key1~Key4: Up to 4 different WEP Key can be setup on each unit. Generate Key: An action to generate a WEP key temporarily on the UI. All the parameters take effective only when the page is submitted. IP920 Operating Manual: Chapter 4 Configuration 37

48 4.7 System Information System Information is used for displaying diagnostic and statistic information. This information includes: Ethernet Packet Statistics Radio Information... COM1 Connection Status... COM2 Connection Status... Other information All this information can help an administrator to setup a network or with troubleshooting. Figure 18 System Information 38 IP920 Operating Manual: Chapter 4 Configuration

49 4.8 System Tools System tools are used for changing the administrator password, upgrading the system, and restoring default radio settings. Figure 19 System Tools Firmware Upgrade Package Upgrade from webui When a newer system version is available, the upgrade package can be uploaded to IP920 through FTP. System upgrade user is different from system administrator. User name for system upgrade is upgrade. Password is admin by default. In case of a command line FTP client is used, both username and password should be punched in. If an upgrade procedure is started from this page, only the password may be needed. This page will be routed to a FTP page so that upgrade package can be dragged and dropped into IP920 to upgrade the unit. FTP session also works remotely, meaning that a remote unit can be upgraded remotely. IP920 Operating Manual: Chapter 4 Configuration 39

50 Package Upgrade from Command Line FTP This section describes the procedure to upgrade an IP920 unit with package upgrade file (*.pkg). Download upgrade package and put it into a known directory; Start up a command line window from the system; Change current directory to where the package file is located; Start a FTP session as shown below; Figure 20 Command Line Package Upgrade Provide proper user name and password to login; Change transfer protocol to BINARY mode; Push package upgrade file into the system with put command; Package upgrade takes up to 2 minutes to complete. Wait until SYS LED stop flashing. If SYS LED doesn t come back to solid ON, the unit need to be manually restarted. 40 IP920 Operating Manual: Chapter 4 Configuration

51 Recovery from Command Line FTP In case the unit needs to be upgraded from recovery mode, the following procedure should be taken. Recovery images have file extension *.img. Download recovery image and save it into a known directory; Start up a command line window from the system; Change current directory to where the package file is located; Cycle power on the IP920 unit with CFG button pressed and held down until SYS LED is observed in fast flash mode; Start a FTP session as shown below; the IP address is set to a default ; Figure 21 Command Line Recovery Provide proper user name and password to login; Change transfer protocol to BINARY mode; Push package upgrade file into the system with put command; Package upgrade takes more than 2 minutes to complete. The SYS LED changes from fast flash to slow flash to indicate upgrading is in process; The unit automatically reboots after the recovery procedure is completed. IP920 Operating Manual: Chapter 4 Configuration 41

52 Parameter Change through Command Line FTP This section describes the procedure to download system configuration file through FTP and upload system configuration parameter file. The system settings can be changed through FTP session rather than navigating through textui or webui. Start up a command line window from the system; Change current directory to where the system configuration file needs to be; Start a FTP session as shown below; Figure 22 Command Line Parameter Loading Provide proper user name (upgrade) and password (admin by default) to login; Download system.conf ; Make necessary changes in system.conf. Comments can be found inside the file. Push system.conf file into the system with put command; The system applies new parameters and reboots itself. 42 IP920 Operating Manual: Chapter 4 Configuration