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@@ -2309,6 +2309,7 @@
                 len = ast_codec_get_samples(&fr->af) / 8;
        } else if(fr->af.frametype == AST_FRAME_CNG) {
                type = JB_TYPE_SILENCE;
+               ast_log(LOG_WARNING,"found a CNG frame\n");
        }

        if ( (!ast_test_flag(iaxs[fr->callno], IAX_USEJITTERBUF)) ) {
@@ -3392,6 +3393,7 @@
                        genuine = 1;
                } else if (f->frametype == AST_FRAME_CNG) {
                        p->notsilenttx = 0;
+                       ast_log(LOG_WARNING,"found a CNG frame\n");
                }
        }
        if (!p->offset.tv_sec && !p->offset.tv_usec) {
@@ -3436,6 +3438,11 @@
                                * next multiple of frame size (so our
                                * silent periods are multiples of
                                * frame size too) */
+
+                               if (abs(ms - p->nextpred) > MAX_TIMESTAMP_SKEW)
+                                       ast_log(LOG_DEBUG,"predicted timestamp skew (%u) > max (%u), using real ts instead.",
+                                               abs(ms - p->nextpred), MAX_TIMESTAMP_SKEW);
+
                                if (f->samples >= 8) /* check to make sure we dont core dump */
                                {
                                        int diff = ms % (f->samples / 8);
@@ -4486,6 +4493,10 @@
        if (iaxs[callno]) {
        /* If there's an outstanding error, return failure now */
                if (!iaxs[callno]->error) {
+                       if(f->frametype == AST_FRAME_CNG) {
+                               ast_log(LOG_WARNING,"found CNG frame\n");
+                       }
+
                        if (ast_test_flag(iaxs[callno], IAX_ALREADYGONE))
                                res = 0;
                                /* Don't waste bandwidth sending null frames */