Hi everyone, I have about 20 SPA504G Sip phones and 4 Grandstream BudgetTone 201 phones. Believe it or not but the Grandstream phones sound a LOT better. All of the Cisco phones have a real muffled tone quality - it like turning up the bass and turning down the treble on a radio. They simply are not crisp. In fact we often have to ask callers to repeat what they were saying. Is this a 3CX thing or a Cisco thing? We are running version 8.0.10116 and I have provisioned all the phones using the standard 3CX templates. Any suggestions on what changes may improve our tone quality?