I am also having issues on my lines today: Weird tones (both DTMF and other strange things), incoming calls going directly to voice mail, outgoing calls ringing busy when the other person says their phone rings and no one is on the other end, outgoing calls failing to connect, and 1/2 to 1 second delay echos.

I haven't opened a ticket since I can't pin down something solid to tell the support guys.