NRP1002/P IP Phone User Manual
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10.6 Common Trouble Cases
Table 10 - Trouble Cases
Trouble Case
Solution
Device could not boot
up
1. The device is powered by external power supply via power adapter or
PoE switch. Please use standard power adapter provided or PoE switch
met with the specification 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 dam
aged. Please refer to the instructions in “
g Post Mode and Recover System Image
” to restore the system image.
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 “10.6 Network Packet
Capture” to get the network packet capture of registration process and
send it to 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, or consult 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.