NOTICE: VVX 500 Business Media Phones manufactured as of May 2017 are being shipped with a new display component from a secondary component vendor. When the VVX 500 business media phone encounters an incompatible version of UC software on the provisioning server that does not support the new component, the phone installs the UC software and you may experience a flicker. Please refer to Engineering Advisory 92279 regarding the patch.
UCS 5.4.0 WARNING:
Due to a serious DTMF related issue discovered just after posting UCS 22.214.171.12436, Polycom has made the decision to REMOVE this version of UC Software and replace it with UCS 126.96.36.19941. As a result, UCS 188.8.131.5236 is NO LONGER SUPPORTED. If you have downloaded UCS 184.108.40.20636, please replace it with UCS 220.127.116.1141 as soon as possible.
NOTICE: The issues that required UCS 5.4.2 to be withdrawn from the Polycom Support web site have now been resolved and the new build is now available for download. Polycom recommends that any customers who have already downloaded UCS 5.4.2 should download UCS 5.4.2 Rev D and use that release going forward. If you have any questions, please contact your Polycom Global Support representative.