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[Software]TRIO UC Software 5.4.2 Rev AB has been released

Polycom Employee & Community Manager

[Software]TRIO UC Software 5.4.2 Rev AB has been released

Hello all,


We are pleased to announce that the Polycom® UC Software Rev AB associated utilities and documents for Polycom® RealPresence Trio™ 8800 only are now available on the Polycom Product Support web pages ( for download.


This software replaces the prior released 5.4.2 Rev AA due the following issue:


  • RealPresence Trio 8800 systems using Polycom UC Software 5.4.2AA enter a reboot loop when connected to Cisco switches that support IEEE 802.3af power over Ethernet (PoE) and have Cisco Discovery Protocol (CDP) enabled and Link Layer Discovery Protocol (LLDP) disabled. This issue does not exist with any other UC Software version or switches other than Cisco. 


UC Software Rev AB is a maintenance release with important field fixes for RealPresence Trio only.


Polycom UC Software Rev AB supports the following platforms:


  • Polycom RealPresence Trio 8800 including the Polycom RealPresence Trio Visual+ accessory


What is available now on web?

  • UC Software 5.4.2 RevAB image
  • UC Software 5.4.2 RevAB CAB file
  • Release Notes for 5.4.2[PDF]
  • Administrator Guide for 5.4.2 RevAB [PDF]
  • Deployment Guide for Microsoft Skype for Business Environments for 5.4.2 RevAB [PDF]
  • Deployment of Polycom RealPresence Trio Solution, SoundStation IP and SoundStation Duo Conference Phones with CUCM [PDF]
  • Regulatory Notices [PDF]


How to download UCS 5.4.2 Rev AB software, release notes & documents:



You can obtain the software and the related documentation from the RealPresence Trio support pages => here <=


What Is Included In This Release:


  • Forward Error Correction (FEC)
  • Customize the Real Presence Trio 8800 System Interface
  • Configure Number Formatting
  • Multiparty Desktop Sharing with Skype for Business
  • Share Desktop at 1080p Resolution with Polycom® People + Content™ IP
  • Microsoft Compatibility
  • Skype for Business Support
  • Configuration Enhancements => here <= or => here <= or => here <= or => here <=

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Please be aware:For questions about the type of support to expect please check here

Please also ensure you always check the VoIP , Video Endpoint , Skype for Business , PSTN or RPM FAQ's

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The title Polycom Employee & Community Manager is an automatic setting within the community and any forum reply or post is based upon my personal experience and does not reflect the opinion or view of my employer.
Poly employee participation within this community is not mandatory and any post or FAQ article provided by myself is done either during my working hours or outside working hours, in my private time, and maybe answered on weekends, bank holidays or personal holidays.