Hi, I have recently installed FusionPBX (version 4.0.0-151125) on AWS. My purpose is : 1) Make a secure call using SRTP (end to end SRTP session) I've already make some test using softphone (Linphone and Csip Simple for android), with enabling SRTP settings on both end point. The result is from the Active Calls Status(on FusionPBX Web-UI), the Caller Extension has already secure (there's SRTP crypto on the Secure column). But at the Receiver Extension, there's no SRTP crypto on the Secure column. Are those calls has been secured (end to end)? 2) Make a secure call using ZRTP (end to end ZRTP session) I've already make some test using softphone (Linphone and Csip Simple for android), with enabling ZRTP settings on both end point. The result is from the Active Calls Status(on FusionPBX Web-UI), there's no ZRTP crypto on the Secure column for both Caller Extension and Receiver Extension. So I guest the ZRTP session (end to end) still did not works. I have not make any changes with the configuration on FreeSwitch/FusionPBX, so it's still in default configuration. Any advise would be highly appreciated. Thanks.