diff -Naur asterisk-87971.orig/channels/chan_misdn.c asterisk-87971.patched-misdnoneway/channels/chan_misdn.c
--- asterisk-87971.orig/channels/chan_misdn.c	2007-11-01 12:52:53.000000000 +0600
+++ asterisk-87971.patched-misdnoneway/channels/chan_misdn.c	2007-11-01 12:20:00.000000000 +0600
@@ -2802,9 +2802,11 @@
 static struct ast_frame *misdn_read(struct ast_channel *ast)
 {
 	struct chan_list *tmp;
-	fd_set rrfs;
-	struct timeval tv;
-	int len, t;
+	// r81368
+	//fd_set rrfs; 
+	//struct timeval tv;
+	//int len, t;
+	int len;
 
 	if (!ast) {
 		chan_misdn_log(1, 0, "misdn_read called without ast\n");
@@ -2819,7 +2821,8 @@
 		chan_misdn_log(1, 0, "misdn_read called without bc\n");
 		return NULL;
 	}
-
+	// r81368
+	/*
 	tv.tv_sec=0;
 	tv.tv_usec=20000;
 
@@ -2838,7 +2841,7 @@
 		return NULL;
 	}
 
-	if (FD_ISSET(tmp->pipe[0],&rrfs)) {
+	if (FD_ISSET(tmp->pipe[0],&rrfs)) { */
 		len=read(tmp->pipe[0],tmp->ast_rd_buf,sizeof(tmp->ast_rd_buf));
 
 		if (len<=0) {
@@ -2846,11 +2849,11 @@
 			chan_misdn_log(2,tmp->bc->port,"misdn_read: Pipe closed, hanging up\n");
 			return NULL;
 		}
-
-	} else {
+	// r81368
+	/*} else {
 		return NULL;
-	}
-
+	}*/
+	tmp->frame.frametype = AST_FRAME_VOICE; // r81368
 	tmp->frame.subclass = AST_FORMAT_ALAW;
 	tmp->frame.datalen = len;
 	tmp->frame.samples = len;
@@ -4584,6 +4587,7 @@
 			}
 		}
 	}
+	// !!! unrolled in r81368
 	ch->l3id=bc->l3_id;
 	ch->addr=bc->addr;
 
@@ -4659,6 +4663,8 @@
 
 			hangup_chan(ch);
 			release_chan(bc);
+			if (bc->need_release_complete) // r81368
+                    		misdn_lib_send_event(bc, EVENT_RELEASE_COMPLETE); //r81368
 		}
 		break;
 	case EVENT_RELEASE_COMPLETE: