H2 DeskPhone
H2P DeskPhone
8AL90394ENAAed01 110 /111
13.7 Common problems
Table 29 - Problems
1. The device is powered by external power supply via a power adapter or
PoE switch. Please use the standard power adapter provided by the
manufacturer or a PoE switch that meets the specifications, and check
whether device is well connected to the power source.
2. If you saw “POST MODE” on the device screen, the device system image
has been damaged. Please contact your location’s technical support to
help you restore the telephone system.
Device could not register to
a service provider
1. Please check whether the 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,
this icon [WAN disconnected] will be flashing in the middle of the
screen.
2. Please check whether 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 whether the network configuration is correct.
3. If the network connection is fine, please check your line configurations
again. If all configurations are correct, please contact your service
provider to get support, or follow the instructions in “13.5 Network packet
capture” to get the network packet capture of the registration process and
send it to the manufacturer’s support to have the manufacturer analyze
the issue.
No Audio or Poor Audio in
Handset
1. Please check whether the handset is connected to the correct handset
( ) port, NOT the headphone ( ) port.
2. The network bandwidth and delay may be not suitable for an audio call at
the moment.
Poor Audio or Low Volume in
Headphone
1. There are two headphone wire sequences on the market. Please use the
headphone provided by the manufacturer, or consult the manufacturer’s
the wire sequence if you wish to use a third-party headphone.
2. The network bandwidth and delay may be not suitable for an audio call at
the moment.
Audio is distorted at the far-
end in hands-free speaker
mode
This is usually due to loud volume feedback from speaker to microphone.
Please lower the speaker volume a little bit, and the distortion will be gone.
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