Panasonic KX-TD500, Руководство по установке

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Troubleshooting
Installation Manual 309
(25) Digital trunk failure (AIS signal reception)
Error Code 1320 xyy: Digital trunk AIS signal reception
x = 1 to 3: Shelf number
yy = 01 to 14: Slot number
Possible cause of
the malfunction 1.
T1/PRI23 card (physical number xyy) received the AIS (Alarm
Indication Signal) signal from the Central Office.
Countermeasures
Note Another T1/PRI23 card with next priority will work as a master card, if
more than two T1/PRI23 cards are registered to the system by PC
programming (TSW card configuration) beforehand. Otherwise, the
system will synchronize with the system internal clock.
Confirm that the setting of "Frame Sequence" and "Line
Coding" are matched with that of the leased lines. If not,
change the setting of your KX-TD500 and CSU. Then check
the clock mode.
Ask the T1/PRI23 carrier to check the line conditions.
Or check the equipment in other switching system which your
T1/PRI23 lines are connected with.
Check the CSU. If not good, replace it with a new one.
End
OK
OK
OK
NG
NG
OK
Test Results NG Test Results OK
NG
NG
Replace the T1/PRI23 card
with a new one.
Check the cabling between "T1/PRI23 and CSU" and
"CSU and NIU." If not properly cabled, change the cabling.
Execute Loop Back Test (Internal).
Execute Loop Back Test (External : between KX-TD500 and
CSU).