User in the field
AR
MR (AR locked on a physical machine)
Video stream
Supporter
The supporter views the supported user screen
There are four communication channels between the parties:
Video streaming
Annotations:
Annotations can be done in AR, MR, and video stream, in video streaming image is frozen before annotated
Voice
Chat
Who can initiate a call?
PC Web | PC | Mobile App | Tablet App | HoloLens | Mobile/ Tablet Web |
Yes | Yes | No | Yes | No | No |
During a call activities
Streaming: Freeze and unfreeze
Web | PC | Mobile/Tablet App | HoloLens | Mobile/tablet web |
No | No | No | No | Yes* |
A supporter can freeze the view of the supported user in some cases as described below:
Web | PC | Mobile/tablet App | HoloLens | Mobile/tablet web |
No | No | Yes** | Yes** | Yes* |
Following freezing the screen, the unfreeze options are:

Unfreeze can be done by both sides.

Note: when unfreezing the annotations will be deleted.