Automatic Esa Maintenance; Esa Line Audits - Nortel DMS-100 Series Maintenance Manual

Fault conditions that can occur during ESA operation are as follows:
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Audits correct these fault conditions. The following section on automatic
maintenance describes these fault conditions.

Automatic ESA maintenance

When fault conditions occur, the host switch and the Star Hub initiate audits
and other system processes to clear the fault. For ESA maintenance, the
automatic features are:
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ESA line audits

The ESA line audit process returns SysB lines to service after a defined period
of time. In ESA mode, a line is SysB when excessive errors occur.
Each time an error occurs on a line, the error count for that line increases. If
the error count reaches a preset threshold, the line becomes SysB. The last
cause of error is in the terminal status table.
A line in a SysB state cannot originate or terminate a call. The ESA resources
are not used. The line audit process returns the SysB lines to service. This
process makes sure that service is available to a line with a transient fault.
line errors
— too many originations
— confusion message received
— line translation error
— dial pulse error (bad digits)
— Digitone error (bad digits)
— ringing error
— coin error
faulty Digitone receivers
static data failure
line audits
DTR audits
downloading static data
routine exercise (REX) tests
— read only memory (ROM) diagnostics
— read access memory (RAM) diagnostics
DMS-100 Family NA100 Star Remote System XPM15 and up
ESA maintenance overview 5-19