Link CX-24 User’s Manual Table 2.
Link CX-24 User’s Manual Table 2.7 – DS-3 Internal Circuit and Radio Link Checklist Checklist Item Verified Inspector Date Does the Link CX-24 input circuitry and DS-3 cabling work properly? (Set up Local + Remote Loopback and verify that the DS-3 equipment is receiving the loopedback signal it is transmitting to the Link CX-24.
Link CX-24 User’s Manual The user is now required to finish configuring the Link CX-24 after physical installation. The Link CX-24 includes a built-in HTML-based web server, which includes configuration, operating, monitoring and test pages. This web server can be accessed locally using a Web browser on a Craft PC, or remotely using any Web browser on the same Ethernet network as the Link CX-24.
Link CX-24 User’s Manual • If the Link CX-24 is set to allow read-only access from any IP address, you can restrict read-only access to fewer IP addresses. 7. When required, make any security upgrades as described in Step 6. The Link CX-24 is now fully configured, tested, and operational, and should continue to operate unattended. Continue with Section 3 for monitoring and trend analysis, and refer to Section 4 for troubleshooting information. 2.
Link CX-24 User’s Manual 6. When the software has been FTPd to the Link CX-24, return to the Update Software page. This process has deleted the selected software load with the new software load. Do not activate the new software load until both ends have received their new software loads. 7. Repeat Step 1 through Step 6 of this update process for the near-end Link CX-24, and then continue with Step 8. 8.
Link CX-24 User’s Manual Section 3 Monitoring and Trend Analysis 60000 3.1 Built-In Web Server Interface Each Link CX-24 and radio link can be monitored through either the built-in Web server or SNMP agent interfaces. A subset of the SNMP-accessible statistics is available through the Web server interface connected to a web browser over an Ethernet link. These statistics can be read by logging in to display the Monitor page, as shown in Appendix C.
Link CX-24 User’s Manual 1. Set elLogEntryNumber to start at the oldest entry 0. 2. Set elScrollControl to forward to read log in FORWARD direction – oldest entries first. 3. Get elTrapTable retrieves the most recent ten entries – repeat for next ten entries. The following SNMP operations also can be used to access or modify information in the error log: • To read the log in the BACKWARDS direction, set elScrollControl to backward. • To clear the log, set elScrollControl to clearLog.
Link CX-24 User’s Manual Section 4 Troubleshooting the Link CX-24 4.1 Troubleshooting Tables This section includes a troubleshooting table for different symptoms: Table 4.1 – Symptoms and Probable Causes Symptoms Probable Cause Power loss to Link CX-24 New obstructions (leafy trees and/or buildings, for example) Antenna no longer in alignment Damaged cables Defective transmission equipment No response from Link CX-24 No payload data being transmitted 4.
Link CX-24 User’s Manual 4.4 Using a Web Browser As described in Appendix C, most of the Link CX-24 configuring, operating, and maintenance are performed using the Link CX-24 Web pages. Use the error indications in the web server interface and Table 4.1 to troubleshoot alarm indications. 4.5 Customer Support Services Your primary source of assistance is the support staff of the organization from which you purchased this product.
Link CX-24 User’s Manual Appendix A - Interface Cable Pinouts Table A.1 – DS-3 Data Cables Link CX-24 IN/OUT TNC Connectors Pin Function 1 RX Shield GND 2 TX Shield GND Wire Color – Foil – Foil DS-3 Equipment BNC Port Function TX GND RX GND Pin 1 Shield 2 Shield Table A.
Link CX-24 User’s Manual Table A.4 – 10/100 Ethernet Crossover Cable Link CX-24 ETHERNET 1/2 Connectors Pin Function 1 RX+ 2 RX3 TX+ 4 TX- Wire Color White/Orange Orange White/Green Green Link CX-24 ETHERNET 1/2 Connectors Function Pin TX+ 3 TX4 RX+ 1 RX2 Table A.5 – RS-232 CLI Craft PC Cable To Link CX-24 TEST (4-pin Circular) Pin Function 1 N/C 2 RS-232 RX 3 RS-232 TX 4 RS-232 GND Version 1.
Link CX-24 User’s Manual Appendix B - Technical Specifications Table B.
Link CX-24 User’s Manual Table B.1 – Link CX-24 DS-3 or Ethernet Version (24GHz) (continued) DS-3 Interface Type Line Rate Line Code Tx and Rx Electrical Interfaces Tx and Rx Physical Connectors Ethernet Interfaces Full-duplex DS-3, per Bellcore GR-499-CORE 44.736 Mbps B3ZS 75 Ohm unbalanced Female TNC coaxial with grounded outer conductor Two, with independent transmit and receive pair sensing Full-duplex 10/100 Base-T per IEEE 802.3 45 Mbps 100 m (328 ft.
Link CX-24 User’s Manual Table B.2 – Integral Reflector Antenna 30 cm diameter x 1.9 cm deep (12 in diameter x 0.75 in deep) Permanently attached to the Link CX-24 radio; gasketed to prevent moisture intrusion Size Mounting Horizontal or vertical, depending on Link CX-24 mounting position 34.5 dBi >45 dB 2.9° ± 15° 360° Polarization Forward Gain Front/Back Ratio Beam Width Elevation Adjustment Azimuth Adjustment Table B.
Link CX-24 User’s Manual Appendix C - Using the Web-Based GUI User Interface 30000 The Link CX-24 includes its own HTML-based installation, operation and test Web pages, which can be accessed locally using a Web browser on a Craft PC, or remotely using any Web browser on the same network as the Link CX-24. C-1 Web Browser Requirements The Web browser used to install, operate, and maintain the Link CX-24 must have an HTML-enabled interface.
Link CX-24 User’s Manual C-4.2 DS-3 Versions Figure C.2 – Link CX-24 DS-3 Monitor Web Page Note that the Monitor page has a hypertext link to the Link CX-24 on the far end of the radio link for faster troubleshooting and easy movement between the two Link CX-24s. Figure C.3 – Link CX-24 DS-3 Commission Radio Web Page Version 1.
Link CX-24 User’s Manual Figure C.4 – Link CX-24 DS-3 Commission Manager Web Page Version 1.
Link CX-24 User’s Manual Figure C.5 – Link CX-24 DS-3 Test Web Page Figure C.6 – Link CX-24 DS-3 Update Software Web Page Version 1.
Link CX-24 User’s Manual C-4.3 Ethernet Versions Figure C.7 – Link CX-24 Ethernet Monitor Web Page Note that the Monitor page has a hypertext link to the Link CX-24 on the far end of the radio link for faster troubleshooting and easy movement between the two Link CX-24s. Figure C.8 – Link CX-24 Ethernet Commission Radio Web Page Version 1.
Link CX-24 User’s Manual Figure C.9 – Link CX-24 Ethernet Commission Manager Web Page Figure C.10 – Link CX-24 Ethernet Test Web Page Figure C.11 – Link CX-24 Ethernet Update Software Web Page Version 1.
Link CX-24 User’s Manual Appendix D - Grounding and Lightning Protection This appendix explains how to properly set up the Link CX-24 radio for grounding and lightning protection. D-1 Overview When used in telecommunications, good grounding practices have some direct benefits that can help users maximize system uptime as well as ensure the safety of those people working on the system.
Link CX-24 User’s Manual Use 4 to 6 AWG wire to connect each ground rod to the equipment to be grounded. The cables should be free of sharp bends. Each ground cable should be at least 2 m in length with at least 1 m separation between each. Refer to local and national electrical codes to determine acceptable grounding methods. The Link CX-24 chassis should be directly connected to ground to ensure that it functions correctly.
Link CX-24 User’s Manual Ground-mounted support structures should be connected at their base to a ground ring through sacrificial ground lugs. Towers should have a connection from each leg. A ground ring should consist of copper cable or solid copper tape, with ground rods equally spaced at 2 m intervals around the base of the structure as close to it as possible. The ground ring is buried approximately 0.6 m deep where soil conditions allow.
Link CX-24 User’s Manual Appendix E - Enterprise MIBs and Traps This appendix contains information about the two different sets of Link CX-24 Management Information Bases (MIBs), their current listings, and where to find the most current versions. E-1 Enterprise MIBs E-1.1 Overview The DS-3 and Ethernet Link CX-24 Enterprise MIBs consist of the following groups of objects: • link_cx_identity group: Model, revision, serial numbers, and channel frequency table. Configured in the factory.
Link CX-24 User’s Manual DESCRIPTION "The revision number of the unit as a whole." ::= { link_cx_identity 2 } unitSerialNumber OBJECT-TYPE SYNTAX DisplayString (SIZE (0..15)) ACCESS read-only STATUS mandatory DESCRIPTION "The serial number of the unit as a whole." ::= { link_cx_identity 3 } boardModelNumber OBJECT-TYPE SYNTAX DisplayString (SIZE (0..15)) ACCESS read-only STATUS mandatory DESCRIPTION "The model number of the PCB board assembly.
Link CX-24 User’s Manual RfFrequencyEntry ::= SEQUENCE { rfChannelIndex INTEGER, rfTxFrequency INTEGER, rfRxFrequency INTEGER } rfChannelIndex OBJECT-TYPE SYNTAX INTEGER (1..2) ACCESS read-only STATUS mandatory DESCRIPTION "The RF channel number." ::= { rfFrequencyEntry 1 } rfTxFrequency OBJECT-TYPE SYNTAX INTEGER ACCESS read-only STATUS mandatory DESCRIPTION "The transmit frequency in MHz.
Link CX-24 User’s Manual "Automatic Tx Power Control mode can be enabled or disabled. If enabled, the two Link CX-24 radios at opposite ends of the radio link send each other feedback messages that they use to adjust their Tx power down to the lowest level that is consistent with good signal quality." ::= { link_cx_configuration 2 } rfTxPowerLimit OBJECT-TYPE SYNTAX INTEGER (-30..0) ACCESS read-write STATUS mandatory DESCRIPTION "Maximum transmit power level limit at the antenna port, in dBm.
Link CX-24 User’s Manual "DS3/E3 LOS alarm control. When enabled, the alarm will be generated. When disabled, the alarm will not be generated even if LOS condition is detected." ::= { link_cx_configuration 7 } -- link_cx_status group rfPowerOutputLevel OBJECT-TYPE SYNTAX INTEGER ACCESS read-only STATUS mandatory DESCRIPTION "The measured radio Tx power level in dBm.
Link CX-24 User’s Manual STATUS mandatory DESCRIPTION "The Tx synthesizer lock status. A value of 1 indicates the Tx synthesizer is locked. A value of 2 indicates the Tx synthesizer is unlocked" ::= { link_cx_status 5 } rxSynthLockAlarmStatus OBJECT-TYPE -- local alarm condition SYNTAX INTEGER { normal(1), alarm(2) } ACCESS read-only STATUS mandatory DESCRIPTION "The Rx synthesizer lock status. A value of 1 indicates the Rx synthesizer is locked.
Link CX-24 User’s Manual A value of 1 indicates the received signal level is above the RSSI alarm threshold. A value of 2 indicates the received signal level is at or below the user configured RSSI alarm level. This alarm is valid only if the Rx synthesizer is locked.
Link CX-24 User’s Manual "The DS3/E3 local loopback control. When enabled, DS3/E3 data on the local interface is looped back through the local interface. When disabled, DS3/E3 data on the local interface is sent over the radio link to the remote unit." ::= { link_cx_test 2 } rfLocalLoopbackTimer OBJECT-TYPE SYNTAX INTEGER (0..1800) ACCESS read-write STATUS mandatory DESCRIPTION "When this value is greater than zero, the radio is in the local loopback mode.
Link CX-24 User’s Manual SYNTAX INTEGER { enabled(1), disabled(2) } ACCESS read-write STATUS mandatory DESCRIPTION "When enabled, pseudo-AIS (constant mark or all ones at the DS3/E3 interface) will be generated." ::= { link_cx_test 6 } -- link_cx_reboot group softwareVersionBank1 OBJECT-TYPE SYNTAX DisplayString (SIZE (0..15)) ACCESS read-only STATUS mandatory DESCRIPTION "The software version in bank one." ::= { link_cx_reboot 1 } softwareVersionBank2 OBJECT-TYPE SYNTAX DisplayString (SIZE (0..
Link CX-24 User’s Manual STATUS mandatory DESCRIPTION "Total number of enterprise traps sent since last reboot.
Link CX-24 User’s Manual E-1.
Link CX-24 User’s Manual STATUS mandatory DESCRIPTION "The revision number of the PCB board assembly." ::= { link_cx_identity 5 } boardSerialNumber OBJECT-TYPE SYNTAX DisplayString (SIZE (0..15)) ACCESS read-only STATUS mandatory DESCRIPTION "The serial number of the PCB board assembly." ::= { link_cx_identity 6 } rfFrequencyTable OBJECT-TYPE SYNTAX SEQUENCE OF RfChannelFreqEntry ACCESS not-accessible STATUS mandatory DESCRIPTION "The table of 2 selectable Tx/Rx frequency channel pairs, in MHz.
Link CX-24 User’s Manual DESCRIPTION "The transmit frequency in MHz." ::= { rfFrequencyEntry 2 } rfRxFrequency OBJECT-TYPE SYNTAX INTEGER ACCESS read-only STATUS mandatory DESCRIPTION "The receive frequency in MHz." ::= { rfFrequencyEntry 3 } -- link_cx_configuration group rfTxAttenuateControl OBJECT-TYPE SYNTAX INTEGER { enabled(1), disabled(2) } ACCESS read-write STATUS mandatory DESCRIPTION "If enabled, attenuates the transmit output level by 40 dB.
Link CX-24 User’s Manual STATUS mandatory DESCRIPTION "The IP Address of the peer radio with which this radio exchanges Automatic Tx Power Control information." ::= { link_cx_configuration 4 } rfChannel OBJECT-TYPE SYNTAX INTEGER (1..2) ACCESS read-write STATUS mandatory DESCRIPTION "The current transmit channel of the local unit. The transmit frequency in MHz for each channel can be read in the rfFrequencyTable." ::= { link_cx_configuration 5 } rfRssiAlarmThresholdSetting OBJECT-TYPE SYNTAX INTEGER (-80..
Link CX-24 User’s Manual bitErrorRate OBJECT-TYPE SYNTAX INTEGER ACCESS read-only STATUS mandatory DESCRIPTION "The estimated bit error rate (BER), in errors per 10^8 bits. A returned value of 0 indicates zero bit errors in 10^8 bits. A returned value of 1 indicates an estimated BER of 1x10^-8. A returned value of 10 indicates an estimated BER of 1x10^-7, and so on.
Link CX-24 User’s Manual alarm(2) } ACCESS read-only STATUS mandatory DESCRIPTION "A value of 1 indicates the Tx power at the antenna port is greater than or equal to -30 dBm. A value of 2 indicates the Tx power at the antenna port is less than -30 dBm." ::= { link_cx_status 7 } demodLockAlarmStatus OBJECT-TYPE -- link alarm condition SYNTAX INTEGER { normal(1), alarm(2) } ACCESS read-only STATUS mandatory DESCRIPTION "The demodulator lock status. A value of 1 indicates the demodulator is locked.
Link CX-24 User’s Manual normal(1), alarm(2) } ACCESS read-only STATUS mandatory DESCRIPTION "A bit error rate alarm will be generated if the level of BER is at or above 10^-3, i.e. if bitErrorRate is equal to or greater than 100000." ::= { link_cx_status 11 } -- link_cx_test group rfTxAttenuateTimer OBJECT-TYPE SYNTAX INTEGER (0..1800) ACCESS read-write STATUS mandatory DESCRIPTION "To temporarily enable Tx attenuation by 40 dB, write the number of seconds to this timer.
Link CX-24 User’s Manual bankOne(1), bankTwo(2) } ACCESS read-write STATUS mandatory DESCRIPTION "Selects the software bank and causes reboot." ::= { link_cx_reboot 4 } -- traps trapSentCounter OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "Total number of enterprise traps sent since last reboot.
Link CX-24 User’s Manual trapSentCounter } DESCRIPTION "A trap that indicates the beginning or end of a test procedure. An alarmTrap trap might result from this procedure." ::= 3 END E-2 Enterprise Traps Link CX-24 supports three enterpriseSpecific traps - alarmTrap, configurationChangeTrap, and unitTestTrap. Each of these traps contains all the relevant variables for that particular trap, in order to minimize polling.
Link CX-24 User’s Manual E-2.3 unitTestTrap Link CX-24 sends this trap when any of the test variables change, either at the start or at completion of a test. All the test state variables are contained in the trap PDU, along with the trap counter. This trap alerts the management application that a change has taken place that will probably result in an alarmTrap before too long (in case it doesn’t already know, and in case it wants to distinguish between this case and spontaneous alarmTraps).
