[asterisk-users] Extension Exists

[Dan Journo]

Hi,

When a VOIP user dials an external number, the calls are routed through our SIP provider.

Is there a simple way to check whether the DDI exists locally before dialling out to the sip provider?
Something like GotoIfExists(5551234 at incoming_calls)
Currently, I'm paying for all calls, regardless of whether they exist locally.

All DDIs exist in the incoming_calls context.

Thanks
Dan
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