Specifications

3-2
ELMo 120 Multiplexer maintenance
Revision 2.01 ELMo 120 Multiplexer Installation and Maintenance Guide 08-01023-01
Maintenance guidelines
The following factors can cause service problems in an EtherLoop
system installation:
• poor wiring conditions
• incomplete cable connections
• improper ELMo 120 Multiplexer equipment installation
• improper data network equipment configuration
• equipment failure
The following sections briefly describe each of these potential problem
causes.
Wiring conditions
In general, EtherLoop systems can function well on standard, twisted
pair phone lines (Category 3 or better). However, in older facilities,
extremely poor wiring conditions may exist that can adversely impact
EtherLoop performance, Also, RJ-11 wall jack connectors can become
corroded, which may not impact voice service other than generating
some static on the line, but can interfere with EtherLoop data service.
Cable connections
Figure 2-17 on page 2-26 shows every connection point in an EtherLoop
system. An incomplete connection at any one of these points could cause
the EtherLoop system to malfunction. Ensure that all connections to the
EtherLoop system are firmly seated and secured.
ELMo 120 Multiplexer equipment installation
ELMo 120 Multiplexer equipment is relatively simple to install.
However, if an equipment card is installed in the wrong slot, or if the
cards are not firmly seated in their backplane connectors, the EtherLoop
system will not function.
Data network equipment configuration
For an EtherLoop system to function, the data network supporting the
system must be properly configured. For example, IP addresses must be
correct, and the network router must be configured properly.
Equipment failure
The LEDs on the ELMo 120 Multiplexer shelf and on the Elite modem
indicate any equipment failures in the EtherLoop system.