RedCONNEX TM AN-80i PTP System User Manual 70-00072-01-03 Proprietary Redline Communications © 2007 Page 1 of 60 March 19, 2007
RedCONNEX TM AN-80i PMP User Manual Copyright Information All rights reserved March 19, 2007. The information in this document is proprietary to Redline Communications Inc. This document may not in whole or in part be copied, reproduced, or reduced to any medium without prior consent, in writing, from Redline Communications Incorporated. Contact Information: Redline Communications Inc. 302 Town Centre Blvd. Suite 100 Markham, ON Canada L3R 0E8 Web site: http://www.redlinecommunications.
RedCONNEX TM AN-80i PMP User Manual TABLE OF CONTENTS 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 2 2.1 2.2 2.3 2.4 2.5 2.6 3 3.1 3.2 3.3 Important Safety & Service Notices....................................................... 7 Safety Warnings ........................................................................................ 7 Important Warning Symbols ...................................................................... 8 Important Service Information ........................................................
RedCONNEX TM AN-80i PMP User Manual 4.3.2 4.3.3 4.3.4 4.3.5 4.3.6 4.3.7 4.3.8 4.3.9 4.3.10 4.3.11 4.3.12 5 5.1 5.2 5.2.1 5.3 5.4 5.5 6 6.1 6.2 6.3 6.3.1 6.3.2 6.3.3 6.3.4 6.4 6.5 Get....................................................................................................... 39 Reboot ................................................................................................. 40 Reset ...................................................................................................
RedCONNEX TM AN-80i PMP User Manual LIST OF TABLES Table 1: Web - System Log Messages ............................................................... 20 Table 2: Web - Max. Power (in dBm) and Modulation Settings........................... 26 Table 3: Web - Ethernet Status Indication .......................................................... 27 Table 4: Web - Screens and User Access .......................................................... 30 Table 5: Web - Default System Users ..........................
RedCONNEX TM AN-80i PMP User Manual LIST OF FIGURES Figure 1: Intro - AN-80i Components .................................................................. 11 Figure 2: Intro - AN-80i with Integrated Antenna................................................. 12 Figure 3: Intro - Indoor Power-over-Ethernet (PoE) Module ............................... 13 Figure 4: Web - Login Screen ............................................................................. 14 Figure 5: Web - System Menu ...................
RedCONNEX TM AN-80i PMP User Manual Chapter 1 1 Important Safety & Service Notices 1.1 Safety Warnings 1. PoE power adapter caution: PoE Power adapter Caution Warning to Service Personnel: 48 VDC Connecting customer premises Ethernet equipment directly to the 'OUTPUT' connector on the AN-80i Power-over-Ethernet power adapter may damage customer network interface equipment. Customer equipment including personal computers, routers, etc., must only be connected to the 'INPUT' port on the PoE unit.
RedCONNEX TM AN-80i PMP User Manual 1.2 Important Warning Symbols The following symbols may be encountered during 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 1.3 High Voltage Important Service Information 1.
RedCONNEX TM AN-80i PMP User Manual 1. The AC wall outlet ground for the indoor POE adapter should be connected to the building grounding system as the AN-80i lightning protectors. 2. Install a lightning arrestor in series with the Ethernet cable at the point of entry to the building. The grounding wire should be connected to the same termination point used for the tower or mast. 3. Install a lightning arrestor in series with the Ethernet cable as close to the AN-80i as practical.
RedCONNEX TM AN-80i PMP User Manual 1.6 UL Information 1. The suitability of the supplied Ethernet cable is subject to the approval of Authority Having Jurisdiction and must comply with the local electrical code. 2. The equipment must be properly grounded according with NEC and other local safety code and building code requirements 3. To meet the over-voltage safety requirements on the telecommunications cables, a minimum 26 AWG telecommunication line cord must be used. 4.
RedCONNEX TM AN-80i PMP User Manual Chapter 2 2 System Overview The Access Node 80i system is manufactured by Redline Communications -- a world leader in design and production of Broadband Fixed Wireless (BFW) systems. Figure 1: Intro - AN-80i Components The AN-80i is a high-performance, high-speed wireless Ethernet bridge for use in a commercial, industrial, business, or government environment. The system can operate with a 5.4 GHz radio installed or a 5.
RedCONNEX TM AN-80i PMP User Manual Each wireless link requires two AN-80i units. One AN-80i is configured as the PTP Master and controls the wireless link. This function is transparent to all Ethernet operations. The master AN-80i uses a scheduled request/grant mechanism to arbitrate requests for bandwidth from the remote unit -- providing non contention-based traffic with predictable transmission characteristics. The second AN-80i operates as a PTP Slave under control of the master unit.
RedCONNEX TM AN-80i PMP User Manual 2.5 Antenna Alignment The AN-80i includes an audible antenna alignment tool to assist in pointing the antenna for maximum signal strength. The signal will sound infrequently when a low signal is detected, and more often as the signal strength increases. The audible signal is enabled and disabled through the user interface: Web: see Antenna Alignment Buzzer Enable on page 24. Telnet: see Antenna Alignment Buzzer Enable on page 41. 2.
RedCONNEX TM AN-80i PMP User Manual Chapter 3 3 Web Interface 3.1 System Login The Web Interface provides all required settings and statistics necessary to configure and monitor the operation of the AN-80i using a standard web browser. An operator can access and control the AN-80i remotely from any geographical location with HTTP connectivity to that unit. On the PC, open a browser (Internet Explorer 6 or higher recommended). For new systems, enter the default IP address (192.169.25.2).
RedCONNEX TM AN-80i PMP User Manual 3.2 System Menu Following a successful login, the General Information screen is displayed. On the left is a menu of all available screens. Point and click on the blue text of the menu to display that screen. Figure 5: Web - System Menu The administrator (admin) has unrestricted access to all screens. All other users have viewing access only. See 3.7: System Password Screen on page 29 for details.
RedCONNEX TM AN-80i PMP User Manual 3.3 System Information Click General Information to view the system overview screen (read-only). Refer to the System Configuration screen for information about changing these settings. Figure 6: Web - General Information Screen General System Name: User-assigned name for this AN-80i. System Details: User-assigned system details information. Contact: User-assigned contact information. Hardware Version: Displays the hardware version of the AN-80i.
RedCONNEX TM AN-80i PMP User Manual Ethernet Ethernet MAC Address: Hardware (MAC) address of this AN-80i. This address is also recorded on a label on the AN-80i chassis. IP Address: User-assigned IP address of this AN-80i. IP Subnet Mask: User assigned IP subnet mask. Default Gateway Address: User-assigned IP address of the default router or gateway. Wireless RF Link Established: Status of the wireless link. Yes - RF link successfully established with remote-end AN-80i.
RedCONNEX TM AN-80i PMP User Manual 3.4 System Status Click System Status in the menu to view system, Ethernet statistics, and wireless interface statistics. 3.4.1 General information System Name: Displays the user-assigned system name. Software Version: Displays the software version in use. RF Link Established: Status for the wireless link connection. Yes - RF link has been successfully established with the remote-end AN-80i. No - RF link has not been established with the remote-end AN-80i.
RedCONNEX TM AN-80i PMP User Manual RF Channel Frequency: User-assigned RF channel. Tx Power: The current transmit power level. If ATPC is enabled, this value may be different than the Tx Power setting in the System Configuration screen. Link Distance [Miles or Km]: Distance between wireless systems. This may be the calculated or user-assigned distance (System Configuration screen). RF Status [Error Code]: A status code indicating the condition of the system RF components. See 5.
RedCONNEX TM AN-80i PMP User Manual 3.5 System Logs Screen Click System Log in the menu to view the system activity and error messages recorded by the AN-80i. Figure 7: Web - System Log Messages The following table provides a brief description of the key messages recorded in the logs by the system.
RedCONNEX TM AN-80i PMP User Manual Table 1: Web - System Log Messages Log Message 1012 - System Description Load: OK, 1013 - System Description Save: OK, 1014 - Options Key Load: OK, 1015 - Options Key Save: OK, 1016 - Options Key Properties Load: OK, 1017 - Options Key Properties Save: OK, 1018 - Options Key Activated: OK, 1019 - Data server started, 1021 - Upgrade OK, 1023 - Firmware configuration OK, 1029 - HTTP(User Mgm): Chg User Attributes OK, 1030 - SNMP Configuration Load: OK, 1031 - SNMP Config
RedCONNEX TM AN-80i PMP User Manual Table 1: Web - System Log Messages Log Message 2008 - Network Configuration Save: ERROR, 2009 - Network Configuration: ERROR, 2010 - Version Ctrl Data Load: ERROR, 2011 - Version Ctrl Data Save: ERROR, 2012 - System Description Load: ERROR, 2013 - System Description Save: ERROR, 2014 - Options Key Load: ERROR, 2015 - Options Key Save: ERROR, 2016 - Options Key Properties Load: ERROR, 2017 - Options Key Properties Save: ERROR, 2018 - Options Key Activated: ERRO
RedCONNEX TM AN-80i PMP User Manual Table 1: Web - System Log Messages Log Message 2028 - Factory Data Corrupted (use fallback values), 2028 - TFTP Error, 2029 - Firmware configuration failed, 2034 - HTTP(User Mgm): Invalid password, 2035 - HTTP(User Mgm): Invalid User, 2036 - HTTP(User Mgm): Chg User Attributes ERROR, 2037 - SNMP Configuration Load: ERROR, 2038 - SNMP Configuration Save: ERROR, 2039 - Invalid Options Key, 70-00072-01-03 Description Error detected in the factory data.
RedCONNEX TM AN-80i PMP User Manual 3.6 System Configuration Screen Click Configure System in the menu to view and adjust configuration settings for general system identification, Ethernet, and the wireless interface. Figure 8: Web - PTP Configuration Screen General System Name: Enter the name for this AN-80i. The name can be any combination of letters and numbers. System Details: Enter additional descriptive details about this AN-80i. The description can be any combination of letters and numbers.
RedCONNEX TM AN-80i PMP User Manual enabled, you must enter the network address of the SNTP server in the SNTP Server IP Address field. SNTP Server IP Address: Enter the network address of the SNTP server. Valid only when the SNTP Enable field is checked. Time Zone (GMT): Enter the hours offset from GMT for this time zone. Valid only when the SNTP Enable field is checked. Syslog Enable: Check this box to enable the Syslog protocol support.
RedCONNEX AN-80i PMP TM User Manual Tx Power [dBm]: Enter the transmit power level (dBm). This setting is for the transceiver output only. The actual EIRP depends on the gain of the connected antenna (see section 6.3: Certified Antennas on page 55). Important: In some regions, the maximum operational power per channel for a specific antenna is limited in accordance with regulations specifying the maximum allowable EIRP levels. Refer to the FCC and CE notices in this manual. See Table 2: Web - Max.
RedCONNEX TM AN-80i PMP User Manual Antenna Gain: Enter the gain (dBm) for the system antenna. When DFS is enabled, it is important that the Antenna Gain setting matches the true antenna gain. If the antenna gain is set higher than the true antenna gain, the system is less sensitive to detecting interference, and is not operating in compliance with the UK/ETSI standard.
RedCONNEX TM AN-80i PMP User Manual System Mode: The PTP Master establishes and manages the bi-directional link with a remote end AN-80i. Only one system in a wireless link must be set for PTP Master mode. PTP Master: This unit begins transmitting automatically; sends poll messages to the remote AN-80i, and negotiates the wireless link. PTP Slave: This unit waits passively, monitoring the selected channel(s) until polled by the PTP Master, and participates in negotiating the wireless link.
RedCONNEX TM AN-80i PMP User Manual 3.7 System Password Screen Click Users Management in the left hand menu to display the System Password screen. This screen allows the operator to modify the system passwords. The AN-80i supports two groups of users: admin and user. See Table 5: Web - Default System Users on 30 for the factory default login values. See Table 4: Web - Screens and User Access on page 30 for permissions associated with each group.
RedCONNEX AN-80i PMP TM User Manual Admin Password: Enter the administrator password (security feature). Add: Click the Add button to make these changes effective. Delete User Use this dialog to delete an existing user. User name: Select an existing user. Admin Password: Enter the administrator password (security feature). Del: Click the Del button to make these changes effective. Group Permissions The following table lists the permissions associated with each group.
RedCONNEX TM AN-80i PMP User Manual 3.8 AN-80i Product Options Screen Click Product Options in the left hand menu to display the Product Options screen. You may not be able to establish a link between AN-80i units, or configure all required parameter settings until you have entered the permanent options key. Permanent options keys must be purchased and are provided in electronic format.
RedCONNEX TM AN-80i PMP User Manual 3.9 Upload Software Click Upload Software in the left hand menu to display the Upload Software screen. This screen is used to upgrade the AN-80i with new software. The AN-80i contains nonvolatile storage for two versions of the software. The upload overwrites the nonoperational (unselected) version. Figure 11: Web - Upload Software Screen TFTP Server IP Address: Enter the IP address of the computer with the software upgrade file.
RedCONNEX TM AN-80i PMP User Manual 3.10 SNMP Settings Screen Click Configure SNMP (blue text) on the System Configuration screen to view and edit the SNMP settings. The hyperlink appears only if the SNMP Enable box is checked. The SNMP protocol allows an application to interrogate the AN-80i for information saved in the MIB and to change enabled fields within the MIB. When the SNMP Agent in the AN-80i detects an error condition, a special message known as a trap can be sent (if enabled).
RedCONNEX TM AN-80i PMP User Manual Read: Grant read access permission only for this community. Deny write permission. Write: Grant write access permission only for this community. Deny read permission. Read&Write: Grant read and write access permission for this community. Chg: Click the Chg button to modify the settings for the adjacent entry. Save Comm: Click the Save Comm button to save changes to the community settings.
RedCONNEX TM AN-80i PMP User Manual 3.10.2 Change SNMP Trap Configuration Each of the eight entries in the SNMP Traps Management table may be changed individually. Click the Chg button to modify the settings for the adjacent entry. Figure 14: Web - SNMP Trap Configuration Screen Index: Display the table position number for this entry. Position 0 is the first entry. IP Address: Enter the IP address (IPv4) associated with this SNMP alarm.
RedCONNEX TM AN-80i PMP User Manual 3.11 Spectrum Sweep Click Spectrum Sweep in the left hand menu to display the Spectrum Sweep configuration screen. The spectrum sweep feature is an off-line RF survey tool to detect interference and evaluate spectrum availability. Configurable survey parameters include the high and low frequency limits, the step size, and the number of samples at each step. The output graph displays the maximum (red) and average (blue) RSSI for each step.
RedCONNEX TM AN-80i PMP User Manual Table 6: Web - Performing a Spectrum Sweep Setting System Mode: PTP Slave System Mode: PTP Master Description No action required: Remote end will remain passive during sweep. Use Web/CLI to disable radio on remote-end. Use 'test' function to save and remote end will restore radio operation automatically after 5 minutes.
RedCONNEX TM AN-80i PMP User Manual Chapter 4 4 CLI Interface 4.1 CLI Command Summary This section describes the procedures for configuring and operating the AN-80i using CLI over a Telnet connection. The following table lists all AN-80i commands available from root mode (default mode when you login). All commands are case-sensitive.
RedCONNEX TM AN-80i PMP User Manual 4.2 Connecting via Telnet To connect to the AN-80i, open a Telnet session to the IP address of the AN-80i. On a Windows™ PC, open the Run command and type 'telnet' followed by the IP address of the AN-80i. When the command prompt screen appears, login to the AN-80i. The AN80i may now be controlled using a set of CLI commands. Figure 17: CLI - Connecting via Telnet The system will logout users automatically if no commands are received (idle) for five minutes.
RedCONNEX AN-80i PMP TM User Manual Table 10: CLI - get rfstatus: Status RF transmitter. rssimax: Maximum RSSI. rssimean: Mean RSSI. rssimin: Minimum RSSI. sinadr: Ration of signal to interference + noise. swver: List the downloaded software versions. sysuptime: Display the time since the last reboot. txpower: Current Tx power setting. ubrate: Current UBR value. wrxpkt: Number of wireless packets received. wrxpktd: Number of wireless packets received that were discarded.
RedCONNEX TM AN-80i PMP User Manual 4.3.6 Set Use the set command to view and/or change a parameter. View a parameter: set [field] Change a parameter: set [field] [value] Table 14: CLI - set Command set 70-00072-01-03 Parameter/Description adaptmod: Enable or disable the adaptive modulation function. off - Disable on - Enable When enabled, the AN-80i will automatically change the modulation to the highest setting that can sustain a packet error rate lower than 1x10e-6.
RedCONNEX TM AN-80i PMP User Manual Table 14: CLI - set dfsaction: Select the mode of operation for DFS. The system set to mastermode monitors for interference from radar devices and other equipment using the same channel frequency. When interference is detected, the system automatically takes the action selected using the drop-down menu: - [none=0 | txoff=1 | chgfreq=2] None: The DFS function is disabled. Tx Off: Transmission is immediately disabled when radar signals are detected.
RedCONNEX TM AN-80i PMP User Manual Table 14: CLI - set flowctrl: Enable or disable the flow control function. The Flow control feature enables the AN-80i to request other Ethernet devices to pause transmission during busy periods. off - Disable on - Enable gateway: Enter the IP address of the default gateway on this segment. gmt: Enter the time offset from GMT (i.e., -5 for EST). http: Enable or disable the HTTP function. When disabled, the Web interface will not be available.
RedCONNEX TM AN-80i PMP User Manual Table 14: CLI - set sntp: SNTP enable setting. off - Disable SNTP protocol support. on - Enable SNTP protocol support. sntpip: Enter the SNTP server IP address. Valid only if sntp is enabled. sntppoll: Enter the interval to synchronize with the sntp server. - SNTP polling interval [hours]. syscontact: Enter additional descriptive details about this AN-80i. The description can be any combination of up to 20 letters and numbers.
RedCONNEX TM AN-80i PMP User Manual Table 15: CLI - show config: Show parameter settings: Sys. Info: sysname = ABC-123 sysdescr = AN-80i Sys sysloc = Lab syscontact = 315 Eth. Cfg: ipaddr = 192.168.25.32 netmask = 255.255.255.0 gateway = 192.168.25.250 flowctrl = Off sntp = On sntpip = 192.168.25.15 gmt = -5 syslog = On syslogip = 192.168.25.25 ethmode = auto http = On telnet = On telnetport = 23 snmp = On Wireless Cfg: rffreq = 5840.
RedCONNEX TM AN-80i PMP User Manual 4.3.8 Snmpcommunity Use the snmpcommunity command to configure SNMP community permissions. Table 16: CLI - snmpcommunity Command snmpcommunity Description add: add a new snmp community to the snmp community table. The index value is assigned automatically. Up to eight community entries can be entered in the table. snmpcommunity add snmpcommunity add 0 | r | w | rw Where. 0 (zero):Deny read and write permission.
RedCONNEX TM AN-80i PMP User Manual 4.3.10 Test Use the test command to load the current edited (but not permanently saved) configuration settings. The system will operate using these setting for five minutes. During this five minute period, you may enter 'save' at any time to permanently save the running configuration. If you do not 'save' the configuration within five minutes, the AN80i reboots -- discarding the unsaved settings and loading the last saved configuration.
RedCONNEX TM AN-80i PMP User Manual Chapter 5 5 Diagnostics and Troubleshooting This section provides basic diagnostic and troubleshooting procedures to help solve problems that may occur with the system. If the system is not operating correctly after applying the suggestions in this section, please contact your local Redline representative. Include the model name and serial number of the system in your communications. 5.
RedCONNEX TM AN-80i PMP User Manual 5.2 Procedure to Reset AN-80i IP Address The AN-80i features a method to gain access to the CLI commands for a unit where the IP address, username, and/or password is unknown, or the Ethernet Follows Wireless function is enabled and has locked the Ethernet interface. This method requires local access to the AN-80i PoE power adapter, the capability to power-cycle the AN-80i, a PC with a telnet client, and an Ethernet cable.
RedCONNEX TM AN-80i PMP User Manual 5.3 Testing and Saving System Parameters The AN-80i is a highly configurable communications device. All configurable options are saved in non-volatile RAM. The system configuration and snmp settings are saved separately. Web Interface The Test button is located on the System Configuration page. Click this button to have the AN-80i load the current settings displayed in the configuration screen. The AN-80i will operate with these settings for a period of five minutes.
RedCONNEX TM AN-80i PMP User Manual 5.4 Troubleshooting the Web Interface The following table lists some common troubleshooting tips for the web interface. Table 22: Diag. - Web Interface Diagnostics Symptom General Information screen is not displayed Possible Problem Incorrect IP address and/or subnet mask. Problems with host computer, or AN-80i. Host PC ARP table is incorrectly configured Solution Perform a ping test from the host computer command line.
RedCONNEX TM AN-80i PMP User Manual 5.5 Status Codes The AN-80i reports the following conditions using the Status Code field. See 3.4: System Status on page 18. Table 23: Diag. - Status Codes Error Type Tx Power RF High Temp. Warning Error # (Hexadecimal) 0x0001 0x0002 RF PLL Lock Error PHY lock error 0x0010 80 MHz PLL lock error Firmware Configuration Error 0x0040 70-00072-01-03 0x0020 0x0100 Description Power output is less than 10 dBm.
RedCONNEX TM AN-80i PMP User Manual Chapter 6 6 Appendices 6.1 AN-80i Technical Specifications Table 24: Spec. - AN-80i Technical Specifications System Capability: RF Band: LOS, Optical-LOS, and Non-LOS 5.4 GHz Radio Installed: 5.470 - 5.725 GHz (TDD) 5.8 GHz Radio Installed: 5.725 - 5.850 GHz (TDD) Center Frequency Steps: 2.
RedCONNEX TM AN-80i PMP User Manual Table 24: Spec. - AN-80i Technical Specifications Compliance: Safety: IEC, EN, and UL/CSA 60950 EMC: 301 489-1, 301 489-17 5.8 GHz Radio: Industry Canada RSS 210, FCC part 15, ETSI EN 302 502 (pending) 5.4 GHz Radio (with DFS): Industry Canada RSS 210, FCC part 15, ETSI EN 301 893 1 Center frequency is dependent on region. Actual Ethernet data throughput is dependent on: protocols, packet size, burst rate, transmission latency, and link distance.
RedCONNEX TM AN-80i PMP User Manual 6.3 Certified Antennas 6.3.1 5.4 GHz Radio: ETSI Certified Antennas The following table lists ETSI certified 5.4 GHz antennas. Table 26: Spec. - ETSI Certified Antennas: 5.4 GHz Operation Redline PN Ant. Gain (dBi) Antenna Type App. 9 Degree 5.15-5.875 GHz PTP Directional Flat Panel 12 Degree 48-00030-00 22 5.250-5.850 GHz PTP Directional Parabolic 4.5 Degree 48-00024-00 28 PTP 5.15-5.875 GHz Directional Flat Panel 6.2 Degree 48-00031-00 28 PTP 5.250-5.
RedCONNEX TM AN-80i PMP User Manual 6.3.3 5.4 GHz Radio: FCC & IC Certified Antennas This device has been designed to operate with the antennas listed below, and having a maximum gain of 22 dB. Antennas not included in this list or having a gain greater than 22 dB are strictly prohibited for use with this device. The required antenna impedance is 50 ohms. Table 28: Spec. - FCC & IC Certified Antennas: 5.4 GHz Operation Redline PN Ant. Gain (dBi) Antenna Type GUI Setting App. 9 Degree 5.15-5.
RedCONNEX TM AN-80i PMP User Manual 6.4 Regional Codes The regional code is incorporated into the options key. This feature enforces compliance to regional regulatory statutes. Table 30: Spec - Regional Identification Codes Regions Band DFS Required 1 Channel Size (MHz) Channel Step (MHz) Start - End (MHz) US 5.8 ISM No 10 20 40 2.5 2.5 2.5 5730 - 5845 5735 - 5840 5745 - 5830 UK 5.8G Yes 2 10 2.5 20 2.
RedCONNEX TM AN-80i PMP User Manual 6.5 Glossary Of Terms Term Antenna Gain ARQ ATPC Beamwidth BFW Bps BPSK Channel dB dBi dBm DFS DHCP Directional Antenna Encryption Ethernet FD FWA Gain Gateway GHz GUI IP Isotropic IXC LEC LED LOS 70-00072-01-03 Definition The measure of antenna performance relative to a theoretical antenna called an isotropic antenna. Automatic Repeat Request. This is the protocol used over the air for error correction. Automatic Transmission Power Control.
RedCONNEX TM AN-80i PMP User Manual Term MAC MHz Modem Modulation Multipath NVRAM NLOS OFDM OLOS Packet PHY PMP PTP QAM QPSK Receiver Sensitivity RF Rx S/N SINADR TCP/IP TFTP Tx UBR 70-00072-01-03 Definition obstructions within the first Fresnel zone. Media Access Control. A unique number assigned to a network device. Corresponds to ISO Network Model Layer 2 data link layer. Megahertz. 1,000,000 Hz MOdulator/DEModulator. A hardware device that converts digital data into analog and vice versa.
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