Does anyone know what this means when you have an active phone call? It is like a little lighting bolt that you push and causes beeping. What does it do
Flash (during a phone call) is an older landline term for switching between calls. If you had a second call come in, you could quickly press down on the hang-up button and it would flash over to the second call. Conferencing two calls together could also be done by flashing between the calls. I would assume this is the same thing, letting you switch between two calls, or conference people together.
