TLS would be perfect but it is not viable at this point. I guess with Verizon being what they are, it is time to start working on a SIP over TLS implementation.

On 9/22/2015 12:24 PM, joel jaeggli wrote:
On 9/22/15 9:03 AM, Mark Stevens wrote:
Hi All,

Has anyone seen that something (most likely an alg) on Verizon's LTE/4G
network is rewriting SIP headers,in particular From Tag identifiers? We
cannot make a SIP call from our cellphones (using cellular data) beyond
30 seconds because the TAGs are rewritten and the destination Asterisk
server drops the call because of this.
sounds like a really good application for TLS

Thanks

Mark



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