Advanced Configuration Features
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Horizon Compact Release 1.01.00 Wireless Ethernet Product User Manual – Volume 2
All three – link outage, “hard” failure and “soft” failure - work in concert. While monitoring for a “soft”
failure, a link outage will invoke RLS immediately. Similarly, while monitoring for a “soft” failure, a “hard”
failure condition will trigger an RLS event.
Note: When selecting Advanced Mode, both the “hard” failure mode and “soft” failure mode are to be
configured.
3.9.1 Settings for Basic Mode
NOTE: although basic mode is available in order to provide a software upgrade path from previous
software releases, it is recommended to use the Advanced Mode enhancements available in Release 4.5.
The Advanced Mode has been simplified with respect to user calculations.
Basic mode relies on RLS link monitor parameters consisting of errors in data transfer between the
modems. It monitors modem block errors and the user configures the number of errors and sampling
time for those errors for both the invocation and revocation of RLS.
3.9.1.1. RLS Signal Degrade Settings
These settings correspond to “soft” failure mode. The RLS signal degrade settings are designed to detect
and react to persistent, low-level modem block error rates. Use of the signal degrade threshold
parameter can accelerate the error detection and reaction process when excessive block error rates
occur. RLS signal degrade detection is used in RLS Basic mode and consists of two commands.
1. set rls signal degrade parameters
2. set rls signal degrade threshold
set rls signal degrade parameters [up err rate] [dn err rate] [up time] [dn time]
Note: This command is overridden by the set rls link monitor parameters command described
in Section
3.9.1.2.
The RLS signal degrade parameters consist of four values. These values are:
• [up err rate] The link should experience block error rates equal to or better than this value to
de-activate RLS, and restore the data Ethernet port. The error rate parameter is entered in
scientific notation. (Example – 1.0e-06)
• [dn err rate] The link should experience block error rates equal to or worse than this value to
activate RLS and disable the data Ethernet port. The error rate parameter is entered in
scientific notation. (Example – 1.0e-05)
• [up time] The amount of time, in milliseconds, that the link must meet the [up err rate]
condition before RLS is de-activated. (Example – 168000)
• [dn time] The amount of time, in milliseconds, that the link must meet the [dn err rate]
condition before RLS is activated. (Example – 16800)
The [up time] and [dn time] parameters are optional. If the time parameters are not supplied the
system will default to 3 times the sample time required to detect the configured modem block
error rate.
set rls signal degrade threshold [percent]
Note: This command is overridden by the set rls link monitor parameters command described
in Section
3.9.1.2.
The RLS signal degrade threshold command accepts a single parameter. It is the minimum
percentage of the sample time which can be used to record an error. The default value is 100
(%). A setting of 100 % means that the system will monitor for the full sample time, even if
enough errors are recorded to exceed the programmed error rate. Setting the signal degrade
threshold to 50 (percent) would allow the system to begin a new sample period at 50%, or half, of
the normal sample time if the error threshold had been reached by that point.
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