For the hardware part: This seems to be the easiest so I will unplug the power source to the ProtegeVoice SVP-4.

For the software part: I don't know how the programming is setup. I just need the programming info/work-around so when someone calls and no one picks up the phone the Sprint Protege CTX KSU would just let it rings (rather than trying to send the call to the powered down ProtegeVoice SVP-4) so the Frontier voicemail will answer the call.

Thank you again for your help. Ken.