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IMSS  /  Services  /  Voice, Mobile, Conference Calls  /  Zoom Video Conferencing

Zoom Video Conferencing

Caltech offers Zoom Pro licenses for free to all active users. This allows for a maximum of 300 participants and unlimited meeting time. To start using Zoom, follow the log in instructions.

Zoom Live Transcripts (Live Captions) Available

Zoom live transcripts are now available for your meetings. Enable Zoom Live Transcripts.

Zoom Privacy and Security Updates

IMSS encourages users to follow the Zoom Meeting Privacy Recommendations which address Zoom Privacy and Security concerns. These recommendations will help mitigate ZoomBombing and Zoom War Dailing. In addition, it is important that users maintain their Zoom client updated.

Zoom and VPN

VPN is not required for cloud services such as Zoom. For a better experience, IMSS recommends not connecting to VPN while using Zoom.

Zoom Meeting Privacy Recommendations

Additional Privacy Options

Zoom Resources

Getting Started

Meeting Host

Meeting Participant

Additional Resources

Zoom Basic vs Licensed (Pro)

Max. Participants Max. Meeting Time Zoom License Cost
2 Unlimited Free- Basic License
100 40 min Free- Basic License
300 Unlimited Available upon request

Zoom Large Meetings and Webinar Licenses

Learn more about the large meeting and webinar license features and pricing.


If you require a Zoom License (pro), large meetings, or webinar, please contact the Help Desk at

Need additional equipment for your meeting?

‚ÄčContact AMT for a wide-field USB camera or an external mic, which is ideal for Zoom meetings in small conference rooms (Academic Media Technologies,, x4657).

Zoom Support

For technical questions related to meetings support please contact Zoom at 888.799.9666 ext.2 or

IMSS Help Desk

For other questions, please contact the IMSS Help Desk at 626-395-3500,, or