Implement ticket #546 and revisit ticket #439:
 - ticket #546 implements RTCP SDES and CNAME
 - re-enable periodic RTP TX which was disabled by #439
 - fixed bug in RTCP TX interval
 - changed PJMEDIA_CODEC_MAX_SILENCE_PERIOD value from ts to msec



git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@2020 74dad513-b988-da41-8d7b-12977e46ad98
diff --git a/pjmedia/src/pjmedia-codec/gsm.c b/pjmedia/src/pjmedia-codec/gsm.c
index 7bb4d72..b4c98db 100644
--- a/pjmedia/src/pjmedia-codec/gsm.c
+++ b/pjmedia/src/pjmedia-codec/gsm.c
@@ -542,7 +542,7 @@
 						NULL);
 	if (is_silence &&
 	    PJMEDIA_CODEC_MAX_SILENCE_PERIOD != -1 &&
-	    silence_duration < PJMEDIA_CODEC_MAX_SILENCE_PERIOD) 
+	    silence_duration < PJMEDIA_CODEC_MAX_SILENCE_PERIOD*8000/1000) 
 	{
 	    output->type = PJMEDIA_FRAME_TYPE_NONE;
 	    output->buf = NULL;