Instruction manual

Meridian 1 Initialization Prevention and Recovery Page 2037 of 3156
Features and Services
Localized Faulty Hardware Recovery (FHWR)
Once a network loop, SDI or ESDI is identified as being faulty, it is tracked
by the FHWR function. When the Meridian 1 is available to load and run a
background routine and the faulty network loop, SDI or ESDI device is still
in enabled status, an appropriate maintenance overlay is automatically
invoked to disable it. A technician can also manually disable it by using
existing maintenance overlay commands. The faulty loop, SDI or ESDI
device is tracked by the FHWR function until the loop is disabled.
When a maintenance overlay is running and Multi-User Login is not enabled,
an OVL111 xx FHWR message is given prior to a user logging into the
system to indicate that the system is automatically performing the FHWR
maintenance task. If the user does log in, the FHWR maintenance task is
interrupted; when the user logs out, the FHWR function will reload the
maintenance overlay to resume disabling the faulty hardware. Once it has
disabled the loop, an FHW004 message is printed on all maintenance TTYs
to indicate that a faulty network loop has been automatically disabled and the
maintenance overlay has terminated (the message FHW005 is printed for an
SDI device and FHW006 for an ESDI device). The device is marked as faulty
in the Meridian 1 database.
Operating parameters
This feature applies to Meridian 1 Options 51C, 61C, and 81C.
After the Network Loop Overload Initialization Prevention function has
identified a faulty network loop, if there are trunks configured on the
hardware, far-end seizure of such trunks are treated in the same manner as a
non-responding trunk.
Feature interactions
Meridian 1 Fault Management
FHW000, FHW001, FHW002, FHW003, FHW004, FHW005, and FHW006
can be defined as a trigger string that is monitored by the Meridian 1 Fault
Management feature.
Feature packaging
This feature is included in base X11 System Software.