I am a lawyer. Federal law preempts state law - just word of caution, not breaking your balls - have fun
The FCC protects the privacy of telephone conversations by requiring notification before a recording device is used to record interstate or foreign telephone conversations. These types of conversations may not be recorded unless the use of a recording device is:
Preceded by verbal or written consent of all parties to the telephone conversation; or
Preceded by verbal notification which is recorded at the beginning, and as part of the call, by the recording party; or
Accompanied by an automatic tone warning device, sometimes called a beep tone, which automatically produces a distinct signal that is repeated at regular intervals during the course of the telephone conversation when the recording device is in use.
Also, no recording device may be used unless it can be physically connected to and disconnected from the telephone line or switched on and off.