Specifications

FibeAir 4800 Installation and Operation Guide Chapter 5 Diagnostics and Troubleshooting
FibeAir 4800 Installation and Operation Guide 5-15
Remote External Loopback
Remote FA4800 can be set to an external loopback to test the remote E1/T1 port
and its connection to the remote side user equipment. In this mode, data coming
from the remote user equipment is looped back to it (see Figure 5-10). This
loopback is initiated by an inband command sent from a management station
connected to the local unit.
Testing
Equipment
Management
Station
E1
Interface
/T1 E1
Interface
/T1
Local
ODU
Inband Loopback
Activation Command
Remote ODU
Figure 5-10. Remote External Loopback
Local Internal Loopback
Local FA4800 can be set to close an internal loopback to test connection between
the local and remote units, remote E1/T1 port and its connection to the remote
side user equipment. In this mode, data coming from the remote user equipment
is looped back to it (see Figure 5-11). This loopback is initiated by an inband
command sent from a management station connected to the local unit.
Testing
Equipment
Management
Station
Local
ODU
Inband Loopback
Activation Command
Remote ODU
E1/T1
Interface
E1
Interface
/T1
Figure 5-11. Local Internal Loopback
5.6 Troubleshooting
Use Table 5-6 and Table 5-6 to diagnose any faults in the system.
Table 5-5. Troubleshooting
Symptom Remedy