If your MiiTel Phone is taking a long time to ring after clicking "Call", the following may be the cause. Please check each solution.Network congestion.
Because of network congestion, it may take longer than usual to establish voice communication. Please check if the network congestion can be cleared by referring to The other person's or your voice is interrupted during a call. to see if we can clear the network congestion.The computer is overloaded.
If your computer is overloaded due to running many applications or having many browser tabs open, it may take longer than usual to establish a voice connection. This can be resolved by closing unnecessary applications and browser tabs and clearing the overloaded state.