ARCHIVED: Known issues with the IU Video Bridge

This content has been archived, and is no longer maintained by Indiana University. Information here may no longer be accurate, and links may no longer be available or reliable.

UITS Collaboration Technologies retired the "23" video bridge (Pexip) on December 23, 2019. This includes all conferences that begin with the prefix 23- as well as the and sites. Zoom has replaced the Pexip videoconferencing service; for more about moving your virtual meetings to Zoom, see Get started with Zoom.

While it is not possible to migrate a 23- conference number to the Zoom service, you can customize your Zoom Personal Meeting ID; for more, see What is Personal Meeting ID (PMI) and Personal Link?
Description Status Workaround Last updated
In Windows, may not obey your audio output selection
Ongoing, reported to vendor
To use a different audio output device in the IU Video Bridge, set the Windows default playback device to your desired source. Only the default playback device will be usable in the IU Video Bridge.
December 14, 2017
One-way audio from Polycom phones
Instead of dialing the auto-attendant (812-856-7060 or 317-278-8080) from your Polycom desktop phone, use Skype for Business. In the search bar, type <conference#>, right-click the result, and choose Skype call.
April 6, 2017
Camera will not un-mute in Chrome
Update Chrome to version 57.x or later
April 6, 2017
Browser plug-ins/extensions designed to block ads or increase security may prevent videoconferencing.
Disable or uninstall the extension, and then refresh the page. By default, Chrome users can disable all extensions by entering incognito mode (Ctrl+Shift+N).
October 17, 2016
Screen sharing from Chrome is extremely low resolution, despite high resolution settings on the computer.
This issue is caused by a problem in the WebRTC protocol. To improve screen share quality, lower your desktop resolution to 1280x720, and quality will improve in the bridge. If you wish, you can then raise your desktop resolution again. The bridge will display the higher resolution until you end the screen share.
October 13, 2016
Locking a conference before any participant starts audio or video prevents new participants from joining the conference.
Before you enable the lock conference feature, initiate audio or video, or click Start Conference in the options menu at the top left. In an affected conference, the host should disable the lock conference feature to allow new participants to join.
May 21, 2016
Chrome or Firefox users at a remote location may successfully connect to, but may not be able to send or receive audio and video.
To allow WebRTC connections to the IU Video Bridge, your computer and institutional firewall must be configured to allow the following traffic:

  • UDP port 3478 outbound to (
  • TCP and UDP ports 49152-65535 outbound to (
  • UDP 19302 outbound to (
June 2, 2015
Home or mobile users participating in an IU Video Bridge conference may experience poor quality or no video or audio.
For suggestions that may improve your conferencing experience, see ARCHIVED: Troubleshoot quality issues in an IU Video Bridge conference.
June 2, 2015
Firefox browser (all versions) cannot share screen when in a video call to any conference on the IU Video Bridge from
Resolved May 6, 2017
Chrome or Firefox users who visited before May 23, 2015 and attempt to join a conference may see this error message: "Not Found. The requested URL/webapp/lobby was not found on this server."
Resolved April 6, 2017
Screen sharing causes all Skype for Business users to be disconnected from the conference.
Resolved September 1, 2016
Tandberg MXP series systems (Edge 95, 3000MXP, 6000MXP) displayed blocky, tiling video when receiving computer content.
Resolved May 21, 2016
Skype for Business mobile app for iOS and Windows could send instant messages to, but could not receive instant messages from, a 23 bridge conference chat room.
Resolved January 6, 2016

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Last modified on 2019-12-23 18:17:08.