Specifications

3-4
ELMo 120 Multiplexer maintenance
Revision 2.01 ELMo 120 Multiplexer Installation and Maintenance Guide 08-01023-01
End-to-end maintenance checklist
Problem Check
No voice or data service
• Verify power at all points in the system
• Verify connections and wiring conditions at
all points
Voice but no data service
• Verify that there is not an external network
problem such as a server being down
• Verify that the Ethernet card on the PC
connected to the Elite modem has been
configured
• Verify that the correct type of Ethernet cable
(“straight” or “crossover”) is being used for
the application.
• Verify that all LEDs on Elite modems are
green
• Verify that the green LEDs at the various
Ethernet connection points are lit
• Check for 10Base-T cable damage
• Verify router configuration and installation
• See “Voice and data connectivity
maintenance in facility room” checklist
Data but no voice service
• Check dialtone at the PSTN/PBX cross-
connect to verify that there is not an external
voice network problem
• Check/replace Filter card in voiceband filter
shelf
• See “Voice and data connectivity
maintenance in facility room” checklist