Digital Link DL3800 DS1, Руководство пользователя

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6-6 DL3800 DS1 Inverse Multiplexer User Guide—February 1999
6
The NETWORK T1 LEDs
on an DL3800 are flashing
green. Make sure a valid DTE device is connected to the DL3800, and is powered
on.
If no DTE device is connected and the unit is configured for V.35 or RS449,
make sure that DTE LOSS is set to None. If the unit is configured for HSSI,
check for a valid HSSI signal (TA and DTR).
If a DTE device is connected, make sure all DTE port LEDs are on.
Check the CURRENT ALARMS AND STATUS ITEMS MENU to make sure no
alarm thresholds have been exceeded.
A T1 circuit is taken out of service for a configured amount of time if
Fallbacks (in Network Alarm Thresholds) or Second Error Restoral Interval (in
Network Configuration) is enabled, and a threshold has been exceeded.
Make sure that the correct T1 cable is connected to the correct T1 port.
You must restore the T1 line manually if it is configured for use w/Manual
Restore (in Network Configuration), and a threshold or alarm condition has
been exceeded.
The DTE port LED’s on the
DL3800 do not illuminate. Make sure the correct DTE cable is securely attached to both units, and the
connected DTE device is actually passing traffic.
If the connected DTE device does not support the RTS or DTR leads,
configure the DTE LOSS for None. This asserts the CTS lead from the
DL3800.
Make sure the DL3800 is configured for the correct electrical signaling from
the DTE device: V.35, RS449, or HSSI.
The UNIT Major and
Minor Alarm LEDs on the
DL3800 do not clear. Alarm thresholds may have been exceeded for the 15 minute or 24 hour
periods. If other thresholds have not been exceeded, the DL3800
automatically clears these alarms after the period has passed.
Table 6-1 Troubleshooting (3 of 5)
Problem Solution