How to separate outgoing extens from the contexts from sip.conf?

I have a sip.conf with stanzas for sip phones that have 
'context=sip-incoming for some Grandstream phones and
another stanza for 
a Sipura SPA3000 with context=pstn-incoming.

Reviewing the code today, I was dismayed to see that all my
outgoing 
extens were mixed into those two.  I have been told this is
very insecure.

How can I separate the outgoing extens?

When I create a context [outgoing] in extensions.conf with
various 
extens, they never get activated.  How to I get them to dial
etc?

Larry
-- 
Larry Alkoff N2LA - Austin TX
Using Thunderbird on Linux
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