Specifications

Conguring Backhaul Chapter 5: Lea v e the Site
Using the LMF Congure Backhaul Advanced Screen
In the event that a backhaul configuration entered at the Operation and maintenance
Center -R adio (OMC -R) results in the OMC -R being unable to communicate with the BTS , it may
be necessary to reset backhaul parameters to their default values using the LMF . The LMF
Configure Backhaul Advanced Screen is used to reset these values.
Prior to executing Procedure 5 -2 , the information determined and gathered while working
through the System Engineering Section of the BTS Set -up Procedure should be available. This
information documents the intended backhaul configuration for the site and should match the
configuration the OMC -R is expecting to use for the BTS . Default values for those parameters
not covered above are listed below:
• Muxing: enabled
• Header Compression: enabled
• Max Transport Unit Size (bytes): 512
• Hello Interval Timer (seconds): 30
• P eriodic Transmission intervals for join/prune messages (seconds): 60
Connection Configuration (ubsCon)
• Interval between LCP/IPCP retries during PPP link negotiation (milliseconds): 1000
F or satellite backhaul: 2000
• Time between PPP keep -alive messages (milliseconds) 1000
F or satellite backhaul: 2000
• Number of PPP keep -alive messages that can be lost before link is marked down: 5
• Number of retries for LCP/IPCP negotiations: 10
• Fractional Span backhaul: P er SE config
5 -4 68P09283A63 -5
FOA A UG 2007