Index: app_disa.c
===================================================================
--- app_disa.c	(revision 82750)
+++ app_disa.c	(working copy)
@@ -299,7 +299,10 @@
 					ast_debug(1,"Successful DISA log-in on chan %s\n", chan->name);
 					continue;
 				}
-			}
+			} else
+				if (j == '#') { /* end of extension */
+					break;
+				}
 
 			exten[i++] = j;  /* save digit */
 			exten[i] = 0;