Merged revisions 328162 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.10

........
  r328162 | mnicholson | 2011-07-14 12:46:32 -0500 (Thu, 14 Jul 2011) | 3 lines
  
  tune the v21 preamble detector to properly detect the desired sequence of hits
  and misses
........


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@328163 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/dsp.c

@@ -624,10 +624,10 @@ static int v21_detect(struct ast_dsp *dsp, v21_detect_state_t *s, int16_t *amp,
 		}
 
 		if (hit) {
-			if (s->hit_count == 0 || s->miss_count == 3) {
+			if (s->miss_count == 3) {
 				s->hit_count++;
 			} else {
-				s->hit_count = 0;
+				s->hit_count = 1;
 			}
 
 			s->miss_count = 0;