AVer H300 user manual - Manual (Page 66)

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ENGLISH
To Call Using Call History:
1. Select Call History and press .
2. Select the site you want to call in the call
history and press .
3. The call will be connected.
4.
If the call failed, it’s either the IP address is
incorrect, the far site is set to do not disturb
mode or the far site hang up the call.