Redline Communications AN-50 User Manual Download

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AN-50 System User Manual

AN-50 System User Manual

[PTP/PMP]

Manual 70-00001-01R00

Release 2.01

Summary of Contents for AN-50

Page 1: ...AN 50 System User Manual AN 50 System User Manual PTP PMP Manual 70 00001 01R00 Release 2 01 ...

Page 2: ...AN 50 System User Manual Page 2 of 76 Redline Communications solving the first mile challenge ...

Page 3: ...ort Email support redlinecommunications com Contact your Redline Distributor Product Registration Product Options http www redlinecommunications com Click on Support User ID Register Password Redline Comments or suggestions concerning this manual may be e mailed to the support team Disclaimer This manual was designed to help you install use and troubleshoot the Redline AN 50 Broadband Fixed Wirele...

Page 4: ...public or is intended to be used in the home 3 Intentional or unintentional changes or modifications not expressly approved by the party responsible for compliance must not be made Any such modifications could void the user s authority to operate the equipment and will void the manufacturer s warranty UL Information 1 Caution for all AC and DC models Double Pole Neutral Fusing 2 The DC source must...

Page 5: ... 1 System Configuration 29 8 2 ID Configuration and Status 32 8 2 1 Link Configuration 33 8 2 2 Wireless Link Statistics 35 8 3 ID Browser 37 8 4 System Information 38 8 5 System Statistics 39 8 6 Upload Software 41 8 7 System Password 43 8 8 System Logs 44 9 Diagnostics and Troubleshooting 46 9 1 Diagnostics Via The Front Panel 46 9 1 1 System Power 47 9 1 2 System Fault 48 9 1 3 Wireless Link 48...

Page 6: ...tion 31 Table 3 System Power Diagnostics 47 Table 4 Wireless Link Diagnostics 48 Table 5 Wireless Signal Diagnostics 49 Table 6 Ethernet Link Diagnostics 50 Table 7 Ethernet Collision Diagnostics 50 Table 8 Web Interface Diagnostics 51 Table 9 Modulation Scheme vs Data Rate 60 Table 10 Availability Versus Outage Time 62 Table 11 Radar Horizon Ranges For Different Terminal Heights H1 and H2 65 Page...

Page 7: ...ation 29 Figure 16 ID Config Status 33 Figure 17 Link Configuration 34 Figure 18 Wireless Link Status 35 Figure 19 ID Browser 37 Figure 20 ID Browser Results 37 Figure 21 AN 50 General Information 38 Figure 22 System Status 39 Figure 23 Upload Software 41 Figure 24 File Transfer Progress 42 Figure 25 System Password 43 Figure 26 System Logs Screen 44 Figure 27 Front Panel Status LEDs 46 Figure 28 ...

Page 8: ...System Specifications Troubleshooting the System 1 2 AN 50 System Overview The AN 50 is a high performance high speed wireless Ethernet bridge that provides a scalable platform for the deployment of multi services over a common equipment infrastructure and management system The AN 50 System can operate in a Point To Point PTP or Point To Multipoint PMP mode depending on the software configuration ...

Page 9: ...ns beyond 50 miles 80 km in line of sight LOS conditions and up to 6 miles 10 km in NLOS conditions The AN 50 using wide beam antennas associated with the PMP mode of operation can operate at over 15 miles 24 km depending on power limits mandated by regional regulation The AN 50 system is a Class A digital device for use in a commercial industrial or business environment Page 9 of 76 ...

Page 10: ...for cleaning Do not use liquid or aerosol cleaners Disconnect the power before cleaning 10 Protect the unit by disconnecting the power if it is not used for long periods of time 11 Locate the AN 50 terminal on a stable horizontal surface or mount it securely in a 19 Telco rack 12 The T 58 Transceiver unit must not be located near power lines or other electrical power circuits 13 The T 58 Transceiv...

Page 11: ...g installation or troubleshooting These warning symbols mean danger Bodily injury may result if you are not aware of the safety hazards involved in working with electrical equipment and radio transmitters Familiarize yourself with standard safety practices before continuing Electro Magnetic Radiation High Voltage Page 11 of 76 ...

Page 12: ...as been spilled a foreign object is inside or the AN 50 terminal has been exposed to rain c The product has been dropped or the housing is damaged 3 Locate the serial number of the AN 50 Terminal Antenna and T 58 Transceiver and record these on your registration card for future reference Use the space below to affix serial number stickers Also record the MAC address located on the back of the AN 5...

Page 13: ...ndoor unit AN 50 Radio outdoor unit T 58 Transceiver Antenna Antenna Mounting Bracket Power Cord and outdoor IF Cable 100 ft 30 5 m User Manual AN 50 Terminal AN 50 Radio Power IF Cables Vertical Mount User Manual Figure 1 The AN 50 System Out Of The Box A complete list of items included in the system is available on the packing list included with the system Note that a complete list of FCC approv...

Page 14: ... The default group is assigned automatically to a fixed ID The AN 50 MAC utilizes a request grant polling mechanism to determine which subscriber station requires bandwidth This is achieved by periodically polling each subscriber station to determine if there is a request for bandwidth If the SS requests bandwidth then the MAC allocates the appropriate number of time slots in both the downstream a...

Page 15: ...link once and resume their normal state For a detailed description of the status indicators on the front panel see the Diagnostics section of this manual Section 9 1 on page 46 A System Status Indicators The System portion of the front panel features a recessed reset switch and two LEDs Pwr and Fault as shown in the figure below Figure 2 Front Panel System Reset The system can be manually hard res...

Page 16: ...ioned slaves is established and will turn off if all links are lost Signal The Signal LED lights solid green if the system the link the links for a master and the provisioned connections all operate within configured parameters See section 9 1 4 on page 49 for a detailed description C Ethernet Status Indicators The Ethernet portion of the front panel display comprises four main LEDs Link 100 FD an...

Page 17: ...t computer or switch Col The Col LED flashes in amber when collisions are detected on the Ethernet port D The LAN Interface The LAN interface is a 10 100 BaseT Ethernet port which is used to connect the AN 50 terminal to either the core network or to a host computer A router or switch is often used to complete the connection to the core network as shown in the figure below Note that different cabl...

Page 18: ...eiver Mount Bracket Pole Figure 6 AN 50 Radio With Vertical Mount The Redline vertical mount bracket can accommodate 1 to 4 4 45 cm 11 45 cm OD masts found on many commercial tower installations Before connecting the AN 50 system it is important to review the safety tips provided at the beginning of this manual Page 18 of 76 ...

Page 19: ...e connects the terminal located indoors to the T 58 Transceiver located outdoors and carries the transmitted and received signal DC power for the AN 50 radio as well as control and reference signals Note that the provided IF cable is meant for exterior use and should be used for only minimal interior runs to connect to the terminal Also note that the BNC connectors are for future use Figure 7 AN 5...

Page 20: ...r the IF cable to be installed on the outside of the building leading to the antenna location on the roof of the building Identify the best path for the link For maximum performance it is recommended to mount the antenna in a location where there is line of sight to the remote terminal If possible the antenna should be positioned such that there is maximum clearance within the first Fresnel zone o...

Page 21: ...ct location for the antenna identified the next step is to assemble and mount the radio onto a building structure pole or tower Note there is an arrow on the back of the antenna which must point in the same direction for both the local and remote systems to ensure proper polarization when the antenna is deployed see Figure 7 above Ensure the proper polarization is used for the antenna after attach...

Page 22: ...042 inches or longer than 1cm 0 38 inches to avoid damage to the T 58 and AN 50 connectors If the core diameter exceeds 1mm use solder type F connectors that do not exceed these dimensions The following steps define the cable installation process 1 Run the cable alongside the antenna pole as shown The IF cable is equipped with 75 ohm male F type connectors at both ends Ensure the cable is running ...

Page 23: ...d be tightened finger tight and then tightened an additional 1 8 of a turn 7 4 Installing The Terminal Once the AN 50 terminal and the radio are connected the terminal is ready to be installed and configured The Ethernet data rate is determined automatically depending on the type of device connected to the system If the terminal is used for connection to a core network the network device is likely...

Page 24: ...u establish other implementations that are not addressed in this manual Figure 12 provides an illustration of the pinout for the AN 50 terminal LAN interface Warning do not connect a telephone cable to the AN 50 LAN interface as this will damage the terminal Jack Pin Function 1 Rx 2 Rx 3 Tx 6 Tx Figure 12 AN 50 Terminal LAN Ethernet Port Pinout Now connect the AC cord to the 110 220 240 VAC outlet...

Page 25: ...he antenna in the desired direction Elevation alignment is accomplished by loosening the two bolts attached to the mounting bracket as shown in Figure 13 below and angling the antenna so it is aligned towards the remote terminal The azimuth alignment is accomplished by loosening the bolts on the antenna bracket and rotating the antenna until alignment is achieved For basic tuning using actual sign...

Page 26: ...ional and Parabolic Antennas listed bellow Redline Part Number Antenna Gain dBi Antenna Type Application 48 00017 14 0 Directional sector PMP 48 00025 14 0 Omni Directional flat panel PMP 48 00014 15 0 Omni Directional flat panel PMP 48 00041 21 0 Directional flat panel PMP PTP 48 00020 23 0 Directional flat panel PMP PTP 48 00006 28 0 Directional flat panel PMP PTP 48 00028 17 0 Directional secto...

Page 27: ...ess otherwise specified Note for the initial set up the operator must connect the host computer locally to the AN 50 terminal as shown in Figure 11 Log on to the AN 50 General Information home page from a web browser Microsoft Internet Explorer is recommended as it enables context help when the cursor is positioned over any item Enter the system s default IP address http 192 168 25 2 Entering the ...

Page 28: ...user This login denies access to the System Config System Password ID Config Status Upload Software and Reset Button on System Status screens Refer to the System Password screen to change the password for future sessions If the password is changed record it in a secure location for future reference Note that the user name cannot be changed from admin Figure 14 User Name And Password Dialog The mai...

Page 29: ...ion page are filled out properly for local and remote terminals Errors in these fields will result in the inability to establish a communication link Please read carefully to ensure a quick trouble free deployment Figure 15 System Configuration The system configuration includes the following fields System Configuration System Name An alphanumeric identifier for the local terminal which can consist...

Page 30: ...provided when requesting a key from your local Redline representative or register directly at http www redlinecommunications com support register Enter the key case sensitive ensure it is correct and click Send Key Please note that the system cannot be used without the option key IP Configuration IP address This field is used to provide an IP address for the local AN 50 terminal The default addres...

Page 31: ...5 36 dBm 48 00031 29 Directional Parabolic PMP 20 7 36 dBm 48 00032 31 2 Directional Parabolic PMP 20 4 8 36 dBm 48 00033 34 8 Directional Parabolic PMP 20 1 2 36 dBm 48 00040 29 Directional Parabolic PMP 20 7 36 dBm 48 00039 31 Directional Parabolic PMP 20 5 36 dBm 48 00041 21 Directional Flat Panel PTP 20 26 47 48 00020 23 Directional Flat Panel PTP 20 26 49 48 00006 28 Directional Flat Panel PT...

Page 32: ...r Radio Enable Specifies whether radio transmission is enabled System Configuration Buttons Save Saves the currently entered parameters Note that when certain parameters for example the Mode are changed clicking Save Configuration will also initiate a system reboot Test Allows testing of the current settings for five minutes after which the system reverts to the previously saved settings To make s...

Page 33: ...elected ID Statistics Displays the Link Connection Status screen see section 8 2 2 for the selected ID New ID Adds a new ID by calling the Link Configuration screen see section 8 2 1 Save IDs Saves the entire ID table in Flash Clear All IDs Clears all IDs from the FLASH Note This process cannot be undone 8 2 1 Link Configuration This screen is displayed through the ID Config Status screen by click...

Page 34: ...oose a link ID other than zero Using the ID Browser one can search for the specific Link ID associated with the link name Peer MAC Enter the MAC address of the subscriber station to register the remote unit If the MAC address is not properly entered the wireless link will not be established and no Ethernet packets can be transferred Max DL Burst Rate Maximum downlink DL burst rate Note Defines the...

Page 35: ...ration information will be lost New ID Save current ID configuration under a new Link Name 8 2 2 Wireless Link Statistics This screen is displayed through the ID Config Status screen by pressing the Status button Figure 18 Wireless Link Status Wireless link Statistics Link Name Displays the link name from the system memory The name remains with the system even during power off states until the ope...

Page 36: ...ed by the master downlink and by the slave uplink RSSI dBm Indicates the average received signal strength RSSI at slave downlink and master uplink SINADR dB Indicates the average signal to interference noise and distortion ratio SINADR at slave downlink and master uplink The ratio is based on the digital information provided from the output of the A D converter and includes the effects of the AGC ...

Page 37: ...r entire link name can be input Type Defines search criteria based on entity type Link Connection or All ID Browser Button and Results Browse Displays the ID Brower results as a list of IDs one per line as shown bellow Figure 20 ID Browser Results ID List the channel ID associated with each link Name List the name associated with each ID Type List the type of the link e g Group or link Page 37 of ...

Page 38: ...ief description of each field on the General Information page General System Name Identifies the local terminal The factory default name for the system is WEB01 System Details Specifies the location telephone number and or contact information Mode Specifies whether the AN 50 operates in PMP PTP master or slave Software Version Specifies the software version in use System Up Time Specifies the time...

Page 39: ...ransceiver s internal temperature rose above 185F 85C The transceiver will shut down for 30 seconds to allow cooling time Radio Power Supply Fault Indicates a fault in the transceiver s power supply This error could be due to a problem with the internal power supply or with the power source from the AN 50 terminal If the Low DC Voltage At Radio error is also indicated see below check the IF cable ...

Page 40: ...discarded due to full buffer Tx Packets Indicates the total number of all transmitted packets Tx Packets Errors Indicates the total number of packets transmitted with error Tx Packets Discarded Indicates the total number of packets discarded due to full buffer Wireless Statistics Active Wireless Links Shows the total number of active links Current Tx Power Specifies the actual current transmit pow...

Page 41: ...erminal contains two FLASH banks for storing two versions of the software firmware The user can select the operating version using the Configuration screen The upload will always overwrite the non operational unselected version therefore it is important to select the desired operating version before beginning the upgrade process The upgrade process is achieved remotely using the Trivial File Trans...

Page 42: ...integrity of the new software If errors were introduced during the transfer process as a result of for example link degradation the AN 50 terminal will reject the new software load and provide a warning that the upgrade was unsuccessful In this case the operator will need to repeat the upload process Figure 24 File Transfer Progress Page 42 of 76 ...

Page 43: ...on System Password from the main menu and apply a new value in the New Password field see Figure 25 using any alphanumeric combination Note the field is case sensitive and can be up to 16 characters in length For more information on password related issues see section 8 on page 27 Note depressing the front panel Reset button for more that five 5 seconds will restore the factory default passwords F...

Page 44: ...thernet port configured The Ethernet port has been properly configured and is operational 103 Parameters saved successfully The latest configuration parameters have been successfully saved into the system memory 104 Upgrade OK The software upgrade process completed successfully 105 Password changed successfully The system password was successfully changed 106 Firmware programmed OK The firmware wa...

Page 45: ...to repeat the process and if the error persist contact your local Redline representative 212 Error firmware configuration An unexpected error occurred while writing the onboard firmware configuration Try to repeat the process 213 Firmware programming failed The firmware programming failed 214 Error while loading version control Software version control data was not loaded successfully 215 Log buff...

Page 46: ...LEDs grouped under the headings System Wireless and Ethernet to help with first level diagnoses of problems encountered with the unit Figure 27 Front Panel Status LEDs Throughout this section reference is made to the Reset button which is a micro switch recessed in the front panel in the System block Use a small narrow object such as a paper clip to access the button Depressing the button for less...

Page 47: ... is not illuminated solid green power is not getting to the unit The most probable causes are Table 3 System Power Diagnostics Symptom Possible Problem Solution On Off switch in Off position Turn on switch at back of unit Fuse blown Replace fuse spares provided Pwr LED does not illuminate Power cord disconnected Securely connect cord to terminal and outlet To replace a fuse pop the black plastic c...

Page 48: ...hed to the remote terminal When the Link LED is off it is an indication there is a problem with either the terminal link radio or with the actual propagation path itself Check the RF Status parameters in the System Status screen The table below lists some of the potential causes Table 4 Wireless Link Diagnostics Symptom Possible Problem Solution Remote terminal is not on or is malfunctioning Verif...

Page 49: ...owever if it flashes constantly the table below summarizes some possible causes Table 5 Wireless Signal Diagnostics Symptom Possible Problem Solution Obstructions in the propagation path causing signal degradation Try to remove obstacles or re locate antenna Antenna moved due to high winds Re align the antenna Weak RF Link Signal LED flashes Poor cable connection between transceiver and antenna Re...

Page 50: ...iary Network equipment including switch router host computer server may be malfunctioning Repair or replace faulty units No Ethernet Link Link LED off Processor malfunction Try short reset or long reset 9 1 6 Ethernet Collision The Ethernet Col LED flashes amber when packet collisions occur over the LAN Note that when connected to a hub it is typical for packet collisions to occur intermittently O...

Page 51: ...to resolve the problem If the ping is unsuccessful there may be problems with the IP address that you are using Try retyping the address If this fails and it appears you have forgotten the IP address of the terminal perform a long reset to restore the terminal to the default value Warning performing a long reset will restore the AN 50 terminal s IP address 192 168 25 2 and IP Subnet Mask 255 255 2...

Page 52: ...eline alternatives such as PSTN ISDN T1 DSL cable and fiber including Greater availability Lower cost of ownership per link Higher throughput with the exception of fiber Greater distances Quicker time to market Greater portability The AN 50 system functions logically as a transparent bridge providing all the benefits of a converged IP network i e IP everywhere A converged network allows operators ...

Page 53: ...le the bandwidth This is achieved by reusing the bandwidth for example assume there are two channels A and B The 60 degree scheme can support a sector to sector scheme of AB AB AB while the 90 degree can support AB AB In terms of interference a narrower sector provides finer granularity in isolating and re allocating channels to avoid the problem whereas a larger sector has less flexibility The ke...

Page 54: ...e customer base grows the other sectors can be easily put online by the addition of only the indoor terminals Illustrated below is a sample hybrid PTP PMP sectorized multi cell deployment constructed using 60 degree antennas Figure 30 Hybrid PTP PMP In multi sector or multi cell deployments proper frequency planning is essential in order to avoid the possibility of co channel interference The oper...

Page 55: ... is guaranteed in terms of CIR at each SS as described previously in this manual The AN 50 system is an ideal solution for Carriers Internet Service Providers ISPs Enterprises Educational Institutions and Campuses A Carriers The AN 50 system will provide benefits to both Incumbent and Competitive Local Exchange Carriers ILECs and CLECs respectively Although ILECs own and provide services over wire...

Page 56: ...s The AN 50 system is perfect for ISPs looking to provide cost effective broadband solutions to demanding business customers including Small Office Home Office SOHO and Small to Medium sized Enterprises SME located just outside of the downtown core where there is a lack of infrastructure As well the AN 50 is well suited for MTU MBUs and backhaul for Hotspots Internet Cafés High speed leased lines ...

Page 57: ...ion requirements offering superior data rates in a secure format using encryption to protect sensitive information Figure 34 Wireless Solution For Enterprise D Educational Institutions and Campuses The World Wide Web is a key element within the education system today with BFW systems serving as an important enabler in bringing Internet content to the student body Fixed wireless systems such as the...

Page 58: ...veral other competitive advantages High Data Rates High Bandwidth Efficiency Long Reach and Wide Coverage Higher Power Efficiency Over the Air Security 9 7 Wireless Facts Wireless technology has existed for many years proving itself to be a reliable communication medium primarily for long haul point to point applications supporting critical links across the country for telephony and broadcast serv...

Page 59: ...proximation and does not consider the details of any specific terrain profile which may impact performance rather a generalized terrain is used in the calculations based on empirical formulas approved by governing bodies such as the IEEE and ITU Also the tool does not consider system parameter variations arising from temperature fluctuations cable loss tolerance antenna alignment errors etc The Li...

Page 60: ...ree space loss attenuation in dB and Grx is the receive antenna gain in dB The FSL value is dependent on the range between the two terminals the type of terrain over which the link is deployed and whether or not the link is operating line of sight LOS optical line of sight OLOS or non LOS NLOS The LOS FSL calculation is well understood and easy to calculate and relies on the fact there is absolute...

Page 61: ... these formulas however it is important to bear in mind that the calculations are an estimate only with relatively large standard deviations 5 15 dB depending on the exact deployment scenario and obstacle characteristics The last element to consider in the path calculation is the signal to noise S N ratio which is defined as S N RSL Smin where Smin is the receiver sensitivity expressed in dBm The ...

Page 62: ... is that it features a transmission correction scheme called Automatic Repeat Request ARQ The ARQ algorithm essentially detects when a packet s has been lost due to fading and makes a request to the remote system to re transmit the lost packet s This feature provides an equivalent link budget gain of over 5 dB which translates directly to an improved margin Another key advantage of the Redline pro...

Page 63: ...AN 50 System User Manual Redline Communications solving the first mile challenge Figure 38 Link Budget For 64 QAM Code Rate Page 63 of 76 ...

Page 64: ...e margin of 3 dB The effects of rain at 5 8 GHz bands are negligible hence are not included in the link budget It is important to note the link calculation assumes that the Earth s curvature is not blocking the propagation path The equation for determining the distance at which the Earth will cause blockage is called the Radar Horizon and is given as follows Rh 1 4 2 1 h h km where h1 is the heigh...

Page 65: ...minal Heights H1 and H2 H2 10 20 30 40 50 60 70 10 25 9 31 3 35 4 38 9 42 0 44 7 47 3 20 31 3 36 7 40 8 44 3 47 3 50 1 52 6 30 35 4 40 8 44 9 48 4 51 4 54 2 56 8 40 38 9 44 3 48 4 51 9 54 9 57 7 60 2 50 42 0 47 3 51 4 54 9 58 0 60 7 63 3 60 44 7 50 1 54 2 57 7 60 7 63 5 66 1 H1 70 47 3 52 6 56 8 60 2 63 3 66 1 68 6 Page 65 of 76 ...

Page 66: ...e Subscriber Stations within the sector 2 Blue Calculation results 3 Green Values used for AN 50 configuration settings Usage Fill in white boxes verify results in blue then config AN50 using green values System Configuration Registration Period frames 50 Max Distance km 7 Max QoS Level 18 Max Traffic Latency us 10 745 Registration Cycle ms 266 Bandwidth Used 70 Link ID Configuration Desired CIR k...

Page 67: ...ered unless a cap on the Obtained Date Rate calculation is desired Desired CIR kbps Enter the CIR Committed Rate Information desired on both the downlink base station to subscriber and uplink subscriber to base station direction of the PMP link for each individual subscriber beginning with subscriber Link ID 4 Enter as many subscribers as desired up to a maximum of 256 Burst Rate Mbps Enter the Un...

Page 68: ...iod set above Bandwidth Used Must be less than 100 70 is more conservative If values are too high or above 100 the user entered a desired CIP higher than the total possible Obtained CIR Obtained CIR kbps The calculated Committed Information Rate based on the entered parameters Adjust input parameters to change CIR s for individual subscribers if desired Page 68 of 76 ...

Page 69: ...na An antenna that concentrates transmission power into one direction Encryption For the purposes of privacy the transformation of data into an unreadable format until reformatted with a decryption key Ethernet A LAN architecture using a bus or star topology FD Full Duplex Refers to the transmission of data in two directions simultaneously i e a telephone FWA Fixed Wireless Access Gain The ratio o...

Page 70: ...lear direct path between two antennas with obstructions within the first Fresnel zone Packet A bundle of data organized in a specific way for transmission The three principal elements of a packet include the header the text and the trailer error detection and correction bits PHY Physical Layer Provides for the transmission of data through a communications channel by defining the electrical mechani...

Page 71: ...100 feet at 250 C RG11 5 dB 30m 100 feet at 250 C Multiplexed IF DC power control Tx Rx AGC APC Network Attributes Transparent bridge DHCP passthrough VLAN passthrough Max Channel IDs CID 256 CIDs one CID per Subscriber Station Provisioning Best effort and Common Information Rate CIR Modulation Dynamic Adaptive Modulation bi directional auto selects BPSK QPSK 16 QAM 64 QAM Over The Air Encryption ...

Page 72: ...ions 23F to 41F and 104F to 131F 5C to 5C and 40C to 55C for up to 16 hours T 58 Operating Conditions 40F to 140F 40C to 60C Wind Loading AN 50 Radio 137 mph 220 km hr Physical Configuration AN 50 terminal AN 50 Radio T 58 Transceiver and antenna AN 50 Dimensions 17 x 12 x 1 75 431 8 mm x 304 8 mm x 44 45 mm Component Weights AN 50 Terminal 2 0 kg T 58 Transceiver 1 0 kg Vertical Mast Bracket Kit ...

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Page 76: ...302 Town Centre Blvd Markham Ontario Canada L3R 08E www redlinecommunications com ...

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