Hi Guys, Am coming to a bit of a blank and don't know what to do! The PABX isn't showing any sign of delay however on the client side the softphone is either taking a while to call or hangup (maybe 5-7 seconds). Doesn't happen every call maybe one in four. Is only happening with 2 computers out of 10, rest on the network is fine. The PABX is hosted remotely in AWS. The softphone is on the latest version and so is the PABX. Both computers have the latest version of .NET. Have tried uninstalling 3cx client and .net and reinstalling. Any further ideas guys?