User Manual

Exalt Communications, Inc.
Exalt i-Series Installation and Management Guide
5000001 67
2007-06-25
• Set the Link Distance parameter to the range that is equal to or greater than the actual
link distance. The value of this setting is determined in the design/engineering stage.
Note: Changing Link Distance parameter will temporarily
interrupt traffic. The Link Distance setting must match at each end and
must not be less than the actual link distance. Adjust the far-end radio
first, and then the near-end radio. If the Link Distance parameter is
changed to a setting less than the actual distance, the link may be lost and
unrecoverable through GUI control. If the link is lost due to this situation,
travel to the radio location(s) may be required to reset the value. If the
Link Distance parameter setting is set to a distance unnecessarily higher
than the actual link distance, the radio may have substantially reduced
performance with respect to throughput and latency.
• Set the TDD Frame Size parameter to the designed level. The value of this setting is
determined in the design/engineering stage. The TDD Frame Size parameter must
match at both ends of the link. The TDD Frame Size parameter setting directly relates
to the capacity, latency, and number of TDM circuits that can be supported over the
given link distance. In multi-link networks, especially where there are collocated
links, it is also important to set all radios to the same TDD Frame Size setting to
avoid self-interference. Note that the GPS or internal synch function may be
necessary for these networks. See Time Division Duplex (TDD) Factors
, Link
Orientation and Synchronization, and Radio Synchronization for more information.
Note: Changing the TDD Frame Size parameter will temporarily
interrupt traffic. TDD Frame Size parameters must match at each
end. Adjust the far-end radio first, and then the near-end radio. If the TDD
Frame Size parameter is set to a value that cannot be supported for the link
distance, the link may be lost and unrecoverable through GUI control. If
the link is lost due to this situation, travel to the radio location(s) may be
required to reset the value.
• The External Alarm Inputs parameter can be ignored unless connecting external
alarm sources to the radio for monitoring the status of these external alarms through
the radio management system (see Interface Connections
on page 109).