--- chan_sip.c.~1.894.~ 2005-10-17 16:26:33.000000000 -0600
+++ chan_sip.c  2005-10-20 18:18:41.000000000 -0600
@@ -5586,6 +5586,12 @@
 {
        struct sip_peer *peer = data;
  
+       /* For dynamic clients, Use the last known IP as the default IP in case a call comes in before next register */
+       if (ast_test_flag(peer, SIP_DYNAMIC)){
+         peer->defaddr.sin_port = peer->addr.sin_port;
+         peer->defaddr.sin_addr = peer->addr.sin_addr;
+       }
+
        memset(&peer->addr, 0, sizeof(peer->addr));
        ast_db_del("SIP/Registry", peer->name);
        manager_event(EVENT_FLAG_SYSTEM, "PeerStatus", "Peer: SIP/%s\r\nPeerStatus: Unregistered\r\nCause: Expired\r\n", peer->name);