This has happened twice today. I'm on the phone on line 2. A second call comes in and line 1 does not ring. I believe in one case it went directly to voicemail and in the other case I got the call waiting beep on line 2 and could see who was calling, but line 1 was not "ringing". I've got a cordless handset on line 2 and a multi-line desk phone which handles 1 and 2 (and rings) and desk phone stayed silent. Anyone else see this oddity?