I'm have a little problem, I'd like to use coverage to ring my primary extension and an analog cordless phone at the same time. My desk phone is a MLX-10DP. My understanding is that the covering phone needs to have a button programmed on it for that feature which the cordless phone doesn't have. If I can't do that, I'd like to use the forward feature, but I need to increase the amount of rings before going to voice mail, it takes the base a little time to find the cordless phone. Thanks for any help!