NEC iPASOLINK EX Advanced, Instruction Manual

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5-38 CORRECTIVE MAINTENANCE
GGS-000548-01E iPASOLINK EX Advanced: O
PERATION
& M
AINTENANCE
Equipment
This condition indicates that the system detects LTI (Loss of Timing Inputs) where
the equipment does not synchronize with any reference sources. The problem of this
condition pertains to the optical fiber cables, electrical cables, or to the far-end NE.
Procedure 5-23
1.
Check if any alarm regarding the reference clock occur. If any exist(s), clear it/
them.
2.
Retrieve the
Current Status
, and check if the
LTI
alarm is cleared. If the alarm is
not cleared, contact NEC for the further maintenance support.
This step ends the procedure.
Equipment
This condition is not an alarm. When the
Maintenance
indicates
On
, the system is
set into the Maintenance mode.
ETH
This condition is not an alarm. The message shows the operating type (MDI or MDI-
X) of the indicated Ethernet port currently running.
MODEM
BB
RF
This condition indicates that the system detects the hardware error of the indicated
object.
Procedure 5-24
1.
Replace the object.
2. Retrieve the Current Status , and check if the Module alarm is cleared. If the
alarm is not cleared, contact NEC for the further maintenance support.
This step ends the procedure.
LTI
Maintenance
MDI/MDI-X
Module