Richard Mudgett afcbc93dae Add ETSI Call Waiting support. ... Add the ability to announce a call to an endpoint when there are no B channels available. A call waiting call is a SETUP message with no B channel selected. Relevant specification: EN 300 056, EN 300 057, EN 300 058 For DAHDI/ISDN channels, the CHANNEL() dialplan function now supports the "no_media_path" option. * Returns "0" if there is a B channel associated with the call. * Returns "1" if no B channel is associated with the call. The call is either on hold or is a call waiting call. If you are going to allow incoming call waiting calls then you need to use CHANNEL(no_media_path) do determine if you must drop a call to accept the new call. Review: https://reviewboard.asterisk.org/r/568/ git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@267261 65c4cc65-6c06-0410-ace0-fbb531ad65f3		2010-06-02 21:05:32 +00:00
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asterisk	Add ETSI Call Waiting support.	2010-06-02 21:05:32 +00:00
solaris-compat	fix the provided unsetenv for solaris to return an int like it's supposed to	2006-03-29 04:14:12 +00:00
asterisk.h	Revert attempt to standardize with _POSIX_C_SOURCE.	2009-09-03 03:30:42 +00:00
jitterbuf.h	incorporates r159808 from branches/1.4:	2008-11-29 17:57:39 +00:00