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NRP1002/P IP Phone User Manual
10.6 Common Trouble Cases
Trouble Case
Device could not boot
up
Device could not
register to a service
provider
No Audio or Poor
Audio in Handset
Poor Audio or Low
Volume in Headphone
Audio is chopping at
far-end in Hands-free
speaker mode
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Table 10 - Trouble Cases
Solution
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 damaged. Please refer to the instructions in "10.5 Entering
g Post Mode and Recover System Image" to restore the system image.
1. Please check if device is well connected to the network. The network
Ethernet cable should be connected to 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.
1. Please check if Handset is connected to the correct Handset (
NOT Headphone (
2. The network bandwidth and delay may be not suitable for audio call at the
moment.
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.
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.
) port.
[Network] port NOT the
) port
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