Hello! I have latest versions of 3CX gateway for skype and 3CX installed. With both incoming and outgoing calls via Skype-gateway sound quality is awful. Strong heartbeats and clicks are audible in a voice , the sound is intermittent. Quality is improving a bit if you use an old Skype version (5 or 4). The sound is bad only with SIP to Skype and Skype to SIP calls. The problem apparently exsists not in the Skype but in the gateway or PBX itself or between them. If I listen to the sound during this kind of calls and connect directly to the audio card jack with my headphones, I hear perfect quality. Also I have the audio-card replaced and it did not help. I think, everything is configured correctly and "voice through PBX" option is seleced. I ask for your advice, I do not know how to find the reason of this issue and how to fix it. Thank you.