Administrator’s Guide for W80 DECT IP Multi-Cell System
247
Audio Issues
Increasing or decreasing the volume
Press the volume key to increase or decrease the ringer volume when the IP phone is idle or ringing, or to adjust
the volume of the engaged audio device (speakerphone or headset) when there is an active call in progress.
Get poor sound quality during a call
If you have poor sound quality/acoustics like intermittent voice, low volume, echo or other noises, the possible reas-
ons could be:
l
Users are seated too far out of recommended microphone range and sound faint, or are seated too close to sens-
itive microphones and cause echo.
l
Intermittent voice is mainly caused by packet loss, due to network congestion, and jitter, due to message recom-
bination of transmission or receiving equipment (for example, timeout handling, retransmission mechanism, buf-
fer underrun).
l
Noisy equipment, such as a computer or a fan, may cause voice interference. Turn off any noisy equipment.
l
Line issues can also cause this problem; disconnect the old line and redial the call to ensure another line may
provide a better connection.
There is no sound when the other party picks up the call
If the caller and receiver cannot hear anything - there is no sound at all when the other party picks up the call, the
possible reason could be: the phone cannot send the real-time transport protocol (RTP) streams, in which audio
data is transmitted, to the connected call.
Try to disable the 180 ring workaround feature.
Related Topic
Play the local ringback tone instead of media when placing a long-dis-
tance number without plus 0
Ensure that the 180 ring workaround feature is disabled.
Related Topic
Firmware and Upgrading Issues
Fail to upgrade the phone firmware
Do one of the following:
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Ensure that the target firmware is not the same as the current firmware.
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Ensure that the target firmware is applicable to the IP phone model.
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Ensure that the current or the target firmware is not protected.
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Ensure that the power is on and the network is available in the process of upgrading.
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Ensure that the web browser is not closed or refreshed when upgrading firmware via the web user interface.
Verifying the firmware version
Go to
OK
>
Status
>
Base
/
Handset
when the handset is idle to check the firmware version.
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