Digital Link DL3800 DS1, Руководство пользователя

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Diagnostics 6-5
6
The NETWORK T1 port
LED’s on the DL3800 never
illuminate. Make sure the T1 cable from your service provider is connected to the
DL3800.
Remove the T1 cable from the affected T1 port, and hardloop the interface
by connecting pins 1-3 and 9-11 of the DB-15 port. If the T1 LED lights up,
check your T1 cabling, and contact your service provider.
The NETWORK T1 LEDs
on the DL3800 are
constantly red. Check each T1 port configuration to make sure the framing and line code
are what the carrier is providing.
Check each DL3800 for excessive errors.
Check the T1 cabling or inside wiring for possible problems.
Verify with the service provider that the local Smart Jack is not looped up.
Perform the hardloop procedure on the affected T1 port to verify that the T1
port is functioning on the unit.
The NETWORK T1 LEDs
are constantly yellow. Make sure no tests are being initiated on the affected T1ports.
Individual T1 port tests cause the T1 LED to turn yellow.
If a test is running, end it by selecting the test, and setting it to Off in the DTE
and NETWORK TESTS MENU.
Verify the DTE device or the T1 carrier is not sending loop up and loop
down codes.
The NETWORK T1 LEDs
are flashing yellow. Check the CURRENT ALARMS AND STATUS ITEMS MENU to see if the unit
is receiving a T1 yellow alarm or transmitting an Alarm Indication Signal
(AIS).
Make sure the remote unit is receiving a valid T1. If it is not, it will transmit
a yellow alarm.
Make sure a valid DTE device is connected to the DL3800, and is powered
on. If a DTE device is not connected and DTE LOSS is set to DTR or RTS, the
DL3800 transmits an AIS to the remote unit.
Table 6-1 Troubleshooting (2 of 5)
Problem Solution