asterisk users - Mar 2011 - Question about how traffic passes from phones

Hopefully this is a simple question.  

How does a non-secure phone that is on a PBX connected to an asterisk over a SIP
trunk communicate with a secure phone connected to the Asterisk server?

I like to think that the secure call terminates on the Asterisk and the
non-secure call is somehow joined to that call on the Asterisk.  Same with the
voice traffic, I'm once again thinking that the Asterisk proxies the calls. 
Just not sure.

Thanks,

Mitch

On Mon, Feb 28, 2011 at 8:49 PM, Mitch Johnson <mitch.johnson7 at
gmail.com>wrote:
> How does a non-secure phone that is on a PBX connected to an asterisk over
> a SIP trunk communicate with a secure phone connected to the Asterisk
> server?
>
I think, although I'm not positive, that if either leg of the call
doesn't
offer SRTP, then there won't be any SRTP in the call path.

-- 
Thanks,
--Warren Selby, dCAP
http://www.selbytech.com
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