You may be getting reports from your customers saying that when they are on a call, the opposite party is telling them that their audio is too quiet, or maybe even too loud when they talk. Usually this isn’t a problem because the opposite party can adjust the volume of the person calling with their own phone, but what if the opposite party has already done that and it’s still too quiet or too loud?
If that is the case then you may be able to adjust three settings on the Yealink device. These can found on the web user interface by going to the ‘Features’ > ‘Audio’ page and adjusting the settings in the image below outlined in green.

An alternative way to think what these settings do is adjusting how sensitive the microphone is on the device. You can adjust the handset, headset and handsfree sensitivity to be weaker or stronger. The valid values are between -50 and 50. The higher the value, the louder it should be. The lower the value, the quieter it should be.
When adjusting this setting it is important to be cautious. Incorrectly configuring the value can have adverse effects on the audio quality so it’s advisable to gradually increase or decrease the value until you find the right spot.
If you control your own provisioning server and would like to configure this remotely you can use the provisioning parameters below:
voice.headset_send
voice.handset_send
voice.handfree_send
Hopefully after adjusting these settings it resolves the issue and provides a better experience for the end-user and the opposite party on the calls.
For further technical assistance with your Yealink devices please contact our support team by emailing support@provu.co.uk.


The first tier in the T3 series is the T30P. Designed to support small office environments, the T30P features a generous 132×64 pixel LCD screen, local 5-way conferencing and support a new EHS adaptor (coming soon) enabling you to connect Wireless Headsets.
Positioned in the middle of the T3 series, the T31 hosts additional features on top of the T30P. Supporting up to 2 SIP accounts and Gigabit connection.
The T33 sits at the top of the T3 series, with a sleek modern design and building on the strengths of the T3 series, the T33 offers users a large 320×240 pixel colour backlit screen. Maximising the users’ visual experience and improving productivity. With support for up to 4 SIP accounts and 5-way conferencing, the T33 is perfect for both small and large office environments.