We setup the following environment 3CX Cloud 12 - with Service Pack 5- 35528.640 Remote Phones/Extensions: Yealink T46g Firmware Version 126.96.36.199 Hardware Version 188.8.131.52.0.0.0 Internet at Remote Extensions: Time Warner Cable Wideband, 35 down/5 up We setup remote tenants with 3CX 12 Cloud edition, with Yealink T46g as remote extensions/phones. TENANT 1 (an office) has reported no issues with audio quality and loves the system. TENANT 2 (a restaurant) has reported random audio loss during phone calls. We check the Jitter Buffer settings, and they were set to the following Type: Adaptive Min Delay: 0 Max Delay: 300 Normal: 123 I found a forum thread, where it explained to edit the Jitter Buffer settings, so we set it to the following: http://community.spiceworks.com/topic/338457-yealink-phones-having-delayed-audio-transmission-on-answer Type: Fixed Min Delay: 120 Max Delay: 120 Normal: 120 This improved audio loss a great deal, but still, there have been complaints about a intermittent audio loss for a few seconds during conversations which has caused them problems. I am puzzeled as to why Tenant 2 is having problems, when Tenant 1 is not. FYI, we have a Sonicwall at Tenant 2, and have enabled bandwidth management to give the phones the highest priority from LAN to WAN. Not sure what else to do. Are there any further settings we should look for to troubleshoot? Help!