1Copyright (c) 1991 Bell Communications Research, Inc. (Bellcore) 2 3Permission to use, copy, modify, and distribute this material 4for any purpose and without fee is hereby granted, provided 5that the above copyright notice and this permission notice 6appear in all copies, and that the name of Bellcore not be 7used in advertising or publicity pertaining to this 8material without the specific, prior written permission 9of an authorized representative of Bellcore. BELLCORE 10MAKES NO REPRESENTATIONS ABOUT THE ACCURACY OR SUITABILITY 11OF THIS MATERIAL FOR ANY PURPOSE. IT IS PROVIDED "AS IS", 12WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES. 13