Get Poor Sound Quality During A Call; There Is No Sound When The Other Party Picks Up The Call; Play The Local Ringback Tone Instead Of Media When Placing A Long Distance Number Without Plus; Wi-Fi And Bluetooth Issues - Yealink SIP-T2 Series Administrator's Manual

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 reasons
could be:
Users are seated too far out of recommended microphone range and sound faint, or are seated too close to sensitive
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microphones and cause echo.
Intermittent voice is mainly caused by packet loss, due to network congestion, and jitter, due to message recom-
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bination of transmission or receiving equipment (for example, timeout handling, retransmission mechanism, buffer
under run).
Noisy equipment, such as a computer or a fan, may cause voice interference. Turn off any noisy equipment.
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Line issues can also cause this problem; disconnect the old line and redial the call to ensure another line may
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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 pos-
sible 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
Early Media
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
Early Media

Wi-Fi and Bluetooth Issues

The wireless signal strength is low

Ensure the IP phone and your gateway/ router are within the working range and there is no obvious interference (walls,
doors, and so on.) between them.

The phone cannot connect to Bluetooth devices all the time

Try to delete the registration information of the Bluetooth device on both IP phone and Bluetooth device, and then
pair and connect it again. Contact Yealink field application engineer and your Bluetooth device manufacturer for more
information.

The Bluetooth headset affects IP phone's voice quality

You may not experience the best voice quality if you use a Bluetooth headset while the 2.4 GHz band is enabled or
while you are in an environment with many other Bluetooth devices. This possible loss in voice quality is due to inher-
ent limitations with Bluetooth technology.
Troubleshooting Solutions
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