Panasonic KX-T336 Installation Instructions Manual page 279

3.35 Digital trunk failure (out of synchronization)
Error Code
Possible cause of
the malfunction
Countermeasures
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T-l card (physical number xx) lost the synchronization with the clock time
sent from the Central Office.
Confirm that the setting of "Frame Sequence" and "Line
Cording" are matched with that of the leased lines.
If not, change the setting of your KX-T336 and CSU.
Then check the clock mode.
Check the cabling between 'T-1 and CSU' and 'CSU
and NIU.' If not properly cabled, change the cabling.
Execute Loopback
Test Results NG
I
Execute Loopback
OK
Check the CSU. If' not good, replace it with a new one.
Ask the T-l carrier to check the line conditions.
Or, check the equipment in other switching system which
your T-l lines are connected with.
Another T-l card with next priority will work as a master card, if more
than two T-l cards were registered to the system by
(Refer to Section 64.03) beforehand. Otherwise, the system will synchronize
with the system internal clock.
14-E-37-1
(70695)fvl
OK
NG
Test Results
between KX-T336 and
NG
NG ,I
End
I I
.
OK