Some helpful links below if you are dealing with remote workers and COVID19 response.
Business continuity landing page:
https://www.webex.com/business-continuity.html
IT advice page:
https://www.webex.com/business-continuity/business-continuity-it-admin.html
End user essentials on getting started:
https://www.webex.com/business-continuity/business-continuity-end-user.html
End user guidance on low bandwidth and troubleshooting:
https://www.webex.com/business-continuity/business-continuity-low-bandwidth.html
VoIPNorm