Exalt Communications, Inc.
r-series
Installation and Management Manual
5000007 (ETSI)
70
2007-02-12 (draft)
Also, it can be helpful to compare some performance parameters of the system before and after
the presence of issues. Often the source of the issues can be determined by thoughtful
consideration of changes, such as:
•
Changes in weather, including high winds
•
Changes made to the radio equipment, transmission system, or connected equipment
•
New radio systems or electronic equipment the nearby radio or transmission system
•
New construction nearby either end of the link, or along the path
•
Tree growth, flooded fields, or changes in rivers/lakes along the path
Verify that configurations are set as follows:
•
RF matches at each end of the link
•
Bandwidth matches at each end of the link
•
Link distance matches at each end of the link
•
TDD Frame Length matches at each end of the link
•
Endpoint Identifier is different at each end of the link (one end Radio A, one end Radio B)
•
Ethernet interfaces are enabled, as desired
•
AUX Ethernet is set for in-band or out-of-band NMS, as desired
•
T1/E1 enabling matches at each end of the link
•
Link security key matches at each end of the link
Also, use the
ExaltCalc
tool in the design phase to determine the optimum setting for the
Bandwidth and TDD Frame Length parameters for the given link distance, and provides
guidance to the expected RF link performance, as well as throughput, latency, and number of
supported T1/E1 circuits.
Typical Indications of Issues
In many cases, microwave radio users do not notice changes or degradation to the radio system
until the radio system fails completely or becomes highly errored or significantly intermittent.
However, regular management of the radio system can help indicate changes in performance that
have not yet impacted user performance, but may impact performance at a later date if left
unchecked or unaddressed. The administrator can use this as an opportunity to be proactive and
monitor the radio link performance regularly, watching for unexplained or unexpected changes
in performance and trends in performance changes.
Most importantly, monitoring radio system RSL over time indicates the performance of the radio
system. Address any long-term drop in RSL and erratic or unsteady RSL. Some RSL changes are
expected and weather patterns and the related multipath can cause dramatic RSL changes
resulting in system outage. However, that outage should not occur at a significantly greater rate