User's Manual

8 Troubleshooting
Troubleshooting via the network management system (NMS)
The NMC-511 FaultManager can be used to detect faults within the ACCESSNET-T IP.
This is done via a NMC computer that has been configured accordingly.
The troubleshooting via the NMC-511 FaultManager should be performed prior to the
troubleshooting on site (e.g. at locations of network elements. It can provide information
whether a site must actually be visited.
The following table lists possible problems, causes and troubleshooting measures.
Troubleshooting
Problem Possible cause Troubleshooting
Base station cannot be
reached/switched on
On/off switch in switch position
"OFF"
Set on/off switch to switch position "ON"
Voltage supply at location not
operational
Check fuse
Check distribution box or mains socket
Check voltage supply cable
Cable connection defective Check internal wiring
Check cables
APDM/DPDM defective Check fuse
Check wiring
Carry out the visual inspection
Check operating state via
NMC-511 FaultManager
PSU/PSM defective ‒ with V
AC
voltage supply
Check operating states via LEDs
Check operating state via
NMC-511 FaultManager
Ethernet connection defective Check operating state via
NMC-511 FaultManager
Check reachability with ping
Connection to transport net-
work defective (stand-alone or
fallback operation)
Cable connection defective Check operating state via LEDs on
switch/router
Check internal wiring
Check ethernet cable
Troubleshooting
DIB-R5 advanced
85Operation Manual 90DIBR5advancedOM02 - 1.0