Canon VB-M40 Operation Manual page 136

Important
If the reset switch is pushed, network-related settings will also
be restored to factory default settings including the camera's IP
address, subnet mask, default gateway address etc.
Accordingly, you can no longer operate the camera from the
PC you were using to connect to the camera before. When
initializing the camera, use the "VB Initial Setting Tool v5.0.1"
installed in your PC to set an IP address appropriate for the
environment in which the camera is used (see "Performing
Initial Settings for the Camera" (P. 2-4)).
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