Thanks Mitch. I eventually figured out the problem. For some reason the profile setting on the radio remote reverted to Default. I'm not sure why that happened, but as soon as I set it back to my custom profile, all was well again. I'm still curious, though, what those tones indicate, as the only tones I have ever heard before are the SIP error tones.
Thanks,
Gus VE7GTC K2GT