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<h2><a href="https://wiki.asterisk.org/wiki/display/TOP/Generic+Session+Manager+Design">Generic Session Manager Design</a></h2>
<h4>Comment <b>removed</b> by <a href="https://wiki.asterisk.org/wiki/display/~khunt">Ken Hunt</a>
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<p>I don't know if I like the name 'Replies' for that interface. It's not exactly replies... it's more commanding the channel service what to do, and that may occur as a reply of something it did (like initiating a call) or it could occur just during the call.</p>
<p>There's a few methods in the Replies interface we should have for sure. progress - It would be used for session progress (a 183 in the world of SIP). congestion - Oddly enough for congestion! (many response codes in the world of SIP).</p>
<p>Some other ones that may be useful in the future: hold, unhold, and flash.</p>
<p>We should be representing callerid as a concrete class, not as a string. There is more to it then just name and number. We can use Asterisk's structure definitions as a base for that, maybe even make it take into account called party stuff from the start.</p>
<p>We should also be taking cause codes into account from the very beginning, so I think we should have it as an integer on the terminated, busy, and congestion methods.</p>
<p>Endpoint shouldn't be providing a source and sink, it should be providing the 'Session' interface from the media work somehow. It allows sources and sinks to be queried.</p>
<p>It has been brought up previously about having Asterisk SCF act in both a stateful call fashion and in a stateless messaging fashion, if this is truly a goal we need to evaluate the above design with both in mind. I've tried to do so and think it could work.</p>
<p>That is all I have for now.</p>
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