VOIP in the field today

I've been away from this topic for a while but am curious.

Has any progress has been made in deploying VOIP without having to use 
underlying security protocols (SSL/TLS or IPSEC) to secure the VOIP 
signaling and media streams?

Are any folks using network edge devices to secure VOIP, e.g., 
"VOIP-aware" firewall or secure voice proxies? Are you complementing 
these with MAC level encryption from endpoint-to-proxy/endpoint-to-edge?

_______________________________________________
firewall-wizards mailing list
[email protected]
https://listserv.icsalabs.com/mailman/listinfo/firewall-wizards

begin:vcard
fn:David Piscitello
n:Piscitello;David
adr;dom:;;3 Myrtle Bank Lane;Hilton Head;SC;29926
email;internet:[email protected]
x-mozilla-html:FALSE
url:http://hhi.corecom.com/weblogindex.htm
version:2.1
end:vcard