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Manafacture: Black Box File size: 1.08 mb File name: Language of manual:

Correction: Check the cable, which connects the end equipment to the modem. Message: Yellow-alarm Description: In fractional T1 applications, an indication from the connected end equipment that it was unsuccessful in synchronizing with the 2.048Mbps Wireless Modem. Correction: Check the cable that connects the end equipment to the modem. Message: Frame-slip Description: In Fractional E1 or Fractional T1 applications, indicates lack of compatibility between the clocks of the 2.048Mbps Wireless Modem and the end equipment. Correction: Configure properly the clocks in the end equipment. Message: Remote-BreezeLINK-Unsync Description: In Fractional E1 or Fractional T1 applications, indicates a temporary incidence of a very noisy radio channel. Repeated occurrences indicate a very noisy radio channel, a hardware problem (e.g. clocks with excessive jitter) or a problem related to configuration of clocks. Correction: Check the quality of the radio link. If the quality is low, try to improve it. Otherwise, the unit should be checked by an authorized Black Box technician Message: Too many BPV/CV Description: In Fractional E1 applications, too many Bipolar code violations-indicates selection of bipolar AMI line code in the 2.048Mbps Wireless Modem when the end equipment uses HDB3 line code. In Fractional T1 applications, too many Bipolar code violations indicates selection of Bipolar AMI line code in the modem when the end equipment uses BHZS line code. Correction: Configure the line code correctly. 78 SALES: 0118 965 5100 2.048Mbps Wireless Modem 2.048Mbps Wireless Modem Message: RLOS (framer un-synchronized) Description: In Fractional T1 applications, the wireless modem was unsuccessful in synchronizing with the end equipment. Correction: Check the cable that connects the end equipment to the modem. Check that parameters of the modem and end equipment match each other (e.g. framing method and line coding). Radio Alarms Message: WARNING: RSSI (based on channel tracer) more than maximum allowed power Description: The radio receives too much power from one or more channels. Correction: Use a lower gain receive antenna or a low power setting or a lower gain transmit antenna on the transmitter at the opposite end. Message: WARNING: RSSI (based on channel tracer) below reception threshold Description: The radio does not receive enough power on one or more channels. Correction: Use a higher gain receive antenna, use a higher gain transmit antenna or a Transmit Power Amplifier at the opposite end, or reduce losses in the RF cables. Message: WARNING: RSSI (based on channel tracer) indicates fade margin less than 10dB Description: There is less than 10dB fade margin on the power received by the radio on one or more channels. Correction: Use a higher gain receive antenna, use a higher gain transmit antenna or a Transmit Power Amplifier at the opposite end, or reduce losses in the RF cables. Message: WARNING: Modem rate too low for RADIO BUFFER ERROR RATE (based on counters) Description: The difference between the modem rate and the LIU rate is too small to allow the ARQ error correction protocol to correct all the errors. Correction: Increase the modem rate, decrease the LIU rate or improve the error rate on the radio by improving the quality of the RF link. 79 TECHNICAL: 0118 931 2233 2.048Mbps Wireless Modem 2.048Mbps Wireless Modem Message: WARNING: Delay setting may be too short to correct all errors Description: The selected delay setting might be too short to allow the ARQ to correct the bursts of radio errors present. Correction: Increase the delay setting or identify and eliminate the cause of the bursts by using the tracers. General Alarms Message: WARNING: LIU Clock drift, Check clock configuration Description: In E1/T1 configuration, failure to set the clock source of the end equipment connected to the slave unit to loop-back mode. Correction: Check the clock configuration. Message: WARNING: LIU Clock frequency differs from set value Description: Indicates a clock rate different from the one specified in a V.35/RS-530/X.21 unit configured as DCE EXTERNAL CLOCK or as DTE. Correction: Correct clock frequency to set value. Message: WARNING: DPLL is noisy due to bad link conditions or noisy input clock Description: Indicates that bad link conditions prevent the slave unit from synthesizing a stable LIU clock. Correction: Check the link and the clock. Message: WARNING: Too many links to synchronize, Reduce requested number Description: The specified number of links to synchronize is too high for the selected hopping standard. Correction: Reduce the number of links to synchronize. 80 SALES: 0118 965 5100 2.048Mbps Wireless Modem 2.048Mbps Wireless Modem Message: WARNING: Net I.D. too high (relevant only regarding synchronization) Description: The Net I.D. for a link that should be synchronized is higher that the requested number of links to synchronize. Correction: Adjust the Net I.D. Message: WARNING: Difference in param...

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