Black Box MWU2000-V35 Manual De Usuario

 

2.048Mbps Wireless Modem 

For fractional E1/T1, the LIU card performs the loopback. Both clock and data are looped 
back. When the Master modem is set for loopback operation, the clock starts drifting from the 
clock of the end equipment (under normal conditions, the system clock is supplied by the 
Master end equipment). Eventually this will lead to error messages and the link will be 
disconnected. Therefore, loopback tests on the Master side should be as short as possible and 
should be limited to 1 to 2 minutes at the most. It is recommended to avoid performing 
loopback test on the Master unit in Fractional E1/T1 applications, or alternatively to switch 
the master/slave definitions of both sides for the duration of the test. For V.35 LIU and RS-
530/X.21 LIU configured to operate with an external clock, the end-equipment (or 
alternatively a BER meter) should be connected to the unit during the test in order to supply 
the required clock.  
 
Line Interface Unit Type Menu 

 

 

 

 

 

The MCP Parameters menu gives you access to the following parameters: 

•

 Network ID 

•

 Master-Slave 

•

 Total Link Delay 

•

 Modem Initialisation String 

•

 Number of Links to Synchronize.