Hi all, I've got 12 Polycom 430's behind a NAT that are working pretty well except for one thing: If one of my users is on the phone when another call comes in, there is about a 10 second time during which the user can't hear the call they're on. Then it returns to normal. My research indicated that I needed to add these setting to the phone: =======================================================<CALL_WAITING tone.chord.callProg.6.freq.1="440" tone.chord.callProg.6.level.1="-19" tone.chord.callProg.6.onDur="300" tone.chord.callProg.6.offDur="100" tone.chord.callProg.6.repeat="2"/> <callWaiting call.callWaiting.ring="ring"/> reg.1.ringType="1" reg.1.lineKeys="1" reg.1.callsPerLineKey="3" reg.2.ringType="1" reg.2.lineKeys="1" reg.2.callsPerLineKey="3" ======================================================= I've uploaded this config to the phone, but the symptoms persist. Any clues? -- Take care and have fun, Mike Diehl.