Abeo LAN over G.703 Extender
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The Status LED on the MXU9020 rear panel shows alarm conditions as shown in the table:
4.1 Alarms
Step 1: Verifty the power supply
Check the status LED on the right hand side of the rear panel of the unit at both ends of the
link. If either is OFF, power is not present on that unit. Check the mains connection to the
unit. If the mains supply is satisfactory, we recommended that the unit be taken out of
service and returned to a repair centre. Unqualified users should not open the MXU9020.
Step 2: Verify the power supply the LAN links
Connect up to 4 LAN cables to the LAN ports. If the LED on the bottom left hand corner of
the RJ-45 socket goes green, or flashes green, then there is a LAN connection. If the LED
remains dark, there is no LAN connection, and investigatory action should be taken on the
LAN and/or its cables.
Step 3: Establish and verify the WAN links
If there is LAN activity, then check for WAN activity by observing the green Tx and Rx LEDs on
the rear panel. If packets are being transmitted or received the LEDs will be ON. If they are
dark, there is no traffic being forwarded over the WAN link, or there is a problem with the
WAN link. This could be bits errors on the data lines, or no clocks present.
MXU9020 with BNC connectors - Step 3A
If the status LED is red, first check that the
PORT SELECT
bit-switch on the base panel is set to
BNC. If it is set correctly, try swapping the E1 LINE BNC connections at that unit.
If the status LED remains red, try looping the BNC connections on the unit with a short piece
of cable. If the status LED goes steady green, the the external BNC cabling is faulty. Check for
cable continuity and network connections, etc...
MXU9020 with RJ-45 connectors - Step 3B
If the status LED is red, first check that the
PORT SELECT
bit-switch on the base panel is set to
BNC. If it is set correctly, check the connections on the RJ-45 cable. Check for cable continuity
and network connections.
The MXU9020 provides a TE presentation for direct connection to the network equipment. If
LOS is experienced, a cross-over cable may be required.
4.2 Troubleshooting
Status LED
Meaning
Off
No mains power present
On Green
Status OK
On Red
E1 WAN port LOS
Summary of Contents for Abeo G.703 LAN
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