Of course it can be skipped but nothing, and I mean nothing, can fire faster than a 100. To my knowledge Sofia fires a 100 before the dialplan even begins hunting, as an example (very good behavior). In cases where the far end has a low T1 timer you should fire a 100 before you even take the time to execute dialplan, etc. Especially in cases where you may encounter high call volume and varying call setup/hunting times. SER config 101 is to fire a 100 before you do any DB logic, etc as it buys you time beyond the first T1 timer (500ms or less) before the far end (that you have no control over) retries. It's best practice and HIGHLY, HIGHLY recommended. This is such a strange case I'm not sure what the best recommendation might be as the original question doesn't contain enough specific detail. On Thu, Apr 21, 2011 at 11:55 AM, Steven Ayre <steveayre@gmail.com> wrote:
Yes, but it can be skipped - for instance if you're autoanswering you could skip the 100 and jump straight to the 200. Or similarly if you're generating ringback jump straight to the 183. There's no reason that 100 is needed first.
-Steve
-- Kristian Kielhofner