51
Troubleshooting
ADDITIONAL
INF
O
RMA
T
IO
N
English
Problem
Cause
Remedy
A call cannot be received.
The connection mode settings of this unit and
the other unit are different.
A unit in the mesh connection mode cannot
communicate with a unit in a cascade
connection mode. Set the two units to the
same connection mode (page 27).
The IP/SIP settings of this unit and the other
unit are different.
A unit using the SIP address cannot
communicate with a unit using the IP
address. Enable or disable the SIP server
operation as required so that both units use
the same type of address (page 27).
The SIP server is not running.
Consult your system administrator.
The audio from the other unit cannot
be heard.
The microphones are muted on the other
unit.
Cancel mute on the other unit.
The audio is interrupted.
The required bandwidth is not reserved.
Check that the bandwidth required for
communication is reserved (page 8).
A network fault occurred.
Wait until the fault is released.
Consult your system administrator.
The LAN cable is not connected properly.
Check that the LAN cable is connected
firmly.
Q4: Other problems
Problem
Cause
Remedy
The audio output is delayed.
The required bandwidth is not reserved.
Check that the bandwidth required for
communication is reserved (page 8).
This unit generates feedback noises.
This unit is located against a wall.
Locate this unit at a certain distance from a
wall.
An object is placed near this unit.
Avoid placing an object in front of the
microphones.
This unit is used in a room with high
reverberation.
Place objects with high sound absorbance in
the room by avoiding the positions in front of
the microphones.
Avoid talking at a loud voice to reduce
reverberations.
The password is forgotten.
Enter the master password (page 35).
