vvx-311 Volume is too low. Any way to increase outside of the volume button

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The handset volume on VVX311 is low and I have trouble hearing even after adjusting the phone volume.  Is there any other way to increase handset volume?
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Michael Sweeney

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Posted 5 months ago

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Cecile Glassy, Champion

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USA-based acct | 2287 Users | 3800 DID lines | 28 sites | all Polycom VVX500 phone handsets 

2018-06-20 

1. Have you already logged into the Polycom handset interface a web browser with a machine connected on your VLAN or LAN that the phones are on?  

2. What version of firmware is presently on the handset?
(Edited)