Index: channels/chan_sip.c
===================================================================
--- channels/chan_sip.c	(revision 362425)
+++ channels/chan_sip.c	(working copy)
@@ -6611,8 +6611,13 @@
 						ast_set_flag(&p->flags[0], SIP_PROGRESS_SENT);
 					}
 				}
-				p->lastrtptx = time(NULL);
-				res = ast_rtp_instance_write(p->rtp, frame);
+				/* If this media is not too premature, pass it on */
+				if (p->invitestate > INV_EARLY_MEDIA ||
+				    ((!global_prematuremediafilter || ast_test_flag(&p->flags[0], SIP_PROG_INBAND) == SIP_PROG_INBAND_YES) &&
+				    p->invitestate == INV_EARLY_MEDIA)) {
+					p->lastrtptx = time(NULL);
+					res = ast_rtp_instance_write(p->rtp, frame);
+				}
 			}
 			sip_pvt_unlock(p);
 		}
@@ -6629,8 +6634,13 @@
 					transmit_provisional_response(p, "183 Session Progress", &p->initreq, TRUE);
 					ast_set_flag(&p->flags[0], SIP_PROGRESS_SENT);
 				}
-				p->lastrtptx = time(NULL);
-				res = ast_rtp_instance_write(p->vrtp, frame);
+				/* If this media is not too premature, pass it on */
+				if (p->invitestate > INV_EARLY_MEDIA ||
+				    ((!global_prematuremediafilter || ast_test_flag(&p->flags[0], SIP_PROG_INBAND) == SIP_PROG_INBAND_YES) &&
+				    p->invitestate == INV_EARLY_MEDIA)) {
+					p->lastrtptx = time(NULL);
+					res = ast_rtp_instance_write(p->vrtp, frame);
+				}
 			}
 			sip_pvt_unlock(p);
 		}
@@ -6650,8 +6660,13 @@
 						transmit_provisional_response(p, "183 Session Progress", &p->initreq, TRUE);
 						ast_set_flag(&p->flags[0], SIP_PROGRESS_SENT);
 					}
-					p->lastrtptx = time(NULL);
-					res = ast_rtp_instance_write(p->trtp, frame);
+					/* If this media is not too premature, pass it on */
+					if (p->invitestate > INV_EARLY_MEDIA ||
+					    ((!global_prematuremediafilter || ast_test_flag(&p->flags[0], SIP_PROG_INBAND) == SIP_PROG_INBAND_YES) &&
+					    p->invitestate == INV_EARLY_MEDIA)) {
+						p->lastrtptx = time(NULL);
+						res = ast_rtp_instance_write(p->trtp, frame);
+					}
 				}
 			}
 			sip_pvt_unlock(p);