Instruction manual

Page 2036 of 3156 Meridian 1 Initialization Prevention and Recovery
553-3001-306 Standard 10.00 January 2002
• Network Loop Overload Initialization Prevention (LOIP), and
• Localized Faulty Hardware Recovery (FHWR).
Network Loop Response Time-out Initialization, Serial Data Interface
Device Response Time-out Initialization Prevention, and Network Loop
Overload Initialization Prevention are designed to prevent system
initialization. The function of Localized Faulty Hardware Recovery is to
automatically disable any faulty loops, Serial Data Interface (SDI) devices or
Expanded Serial Data Interface (ESDI) devices identified by this feature.
Network Loop Response Time-out Initialization (LRIP)
When a network loop fails to respond to a processing request, the LRIP
function is automatically invoked to avert a system initialization. An
FHW000 message is printed on all maintenance TTYs to notify the system
administrator of the faulty loop. The loop is marked as faulty in the
Meridian 1 database.
Serial Data Interface Device Response Time-out Initialization
Prevention (SRIP)
When a Serial Data Interface (SDI) or ESDI device fails to respond to a
processing request, the SRIP function is automatically invoked to avert a
system initialization. An FHW001 message is printed on all maintenance
TTYs to notify the system administrator of the faulty SDI. An FHW002
message is printed on all maintenance TTYs to notify the system
administrator of the faulty ESDI. The device is marked as faulty in the
Meridian 1 database.
Network Loop Overload Initialization Prevention (LOIP)
When loop overload is detected, the LOIP function is automatically invoked
to avert a system initialization. This function disables the signaling capability
of the network loop and marks it as faulty in the Meridian 1 database before
allowing the existing processing to continue. An FHW003 message is printed
on all maintenance TTYs to indicate the faulty network loop and to indicate
that an INI000 0006 has been averted. The device is marked as faulty in the
Meridian 1 database.