Black Box MWU2000-X21, MWU2000-G703, MWU2000-V35 manual RXD and TXD, Rx Sync, TX Sync

2.048Mbps Wireless Modem

AIS

(Alarm Indication Signal - E1/T1 and Fractional E1/T1 only). Red LED lights when WAN or DTE control frame is received by the modem indicating that information that should be sent by the modem is not received by the DTE (or the WAN). The main reason for alarm indication signal is a physical cable problem.

1.Check the cables and connectors linking the unit with the WAN or the DTE.

2.If these are OK, check WAN or DTE functionality.

RXD and TXD

Orange RXD and TXD LEDs indicate that data present at the LIU connector is sent over the RF link to the remote LIU connector (this does not indicate that end equipment exists or is synchronized).

Radio

Rx Sync

Green LED lights indicating radio receiving link active.

TX Sync

Green LED lights indicating radio transmission link active.

After power-on of the 2.048Mbps Wireless Modem configured as Master, the unit immediately starts transmitting. At this stage, the TX Sync LED on the Master is on while the RX Sync LED is off.

After power-on of the 2.048Mbps Wireless Modem configured as Slave, the unit starts to search for a transmitting Master. At this stage both RX Sync and TX Sync LEDs on the Slave are off.

After the Slave synchronizes with a transmitting Master, it immediately starts transmitting. Now, both RX Sync and TX Sync LEDs on the Slave are on..

The RX Sync LED on the Master is on after reception from the transmitting Slave is established. Failure of radio link reception or transmission may indicate one of the following:

•A problem in the radio configuration parameters (network ID, for example).

•A problem in the radio path (obstacles, for example).

•Antennas need adjustment.

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