User's Manual

113
requirements and check if device is well connected to power
source.
2. If you saw “POST MODE” on the device screen, the device
system image has been damaged. Please contact location
technical support to help you restore the phone system.
Device could not register to a
service provider
1. Please check if device is well connected to the network. The
network Ethernet cable should be connected to the
[Network] port NOT the [PC] port. If the cable is not well
connected to the network icon [WAN disconnected] will be
flashing in the middle of the screen.
2. Please check if the device has an IP address. Check the system
information, if the IP displays “Negotiating…”, the device does not
have an IP address. Please check if the network configurations is
correct.
3. If network connection is fine, please check again your line
configurations. If all configurations are correct, please kindly
contact your service provider to get support, or follow the
instructions in “13.5 Network Packet Capture” to get the network
packet capture of registration process and send it to Fanvil
support to analyze the issue.
No Audio or Poor Audio in
Handset
1. Please check if Handset is connected to the correct Handset ( )
port NOT Headphone ( ) port.
2. The network bandwidth and delay may be not suitable for audio
call at the moment.
Poor Audio or Low Volume in
Headphone
1. There are two Headphone wire sequence in the market. Please
use the Headphone provided by Fanvil, or consult Fanvil the wire
sequence if you wish to use a third-party headphone.
2. The network bandwidth and delay may be not suitable for audio
call at the moment.
Audio is chopping at far-end
in Hands-free speaker mode
This is usually due to loud volume feedback from speaker to
microphone. Please lower down the speaker volume a little bit, the
chopping will be gone.