Hi all, Anyone has information on how Chinese equipment makers are encrypting the SIP signaling + media packets to avoid ISP firewalls? Recently, I was sent a sample FXS/O gateway with support for 3 flavors (Seawolf, etc) of such encryption. I don't believe they're using SIP/TLS and SRTP. At first glance, it looks like a simple shared key scheme, certainly without all the key management of SRTP. Cheers. Leo.