0000950133-98-003539 8-K 2 19981014 5 7 19981019 NASD CIENA CORP 0000936395 3661 232725311 DE 1031 8-K 34 000-21969 98727412 1201 WINTERSON ROAD LINTHICUM MD 21090 4108658500 1201 WINTERSON ROAD LINTHICUM MD 21090 8-K 1 000095013398003539-001-seq1-8-k.txt FORM 8-K EX-99.1 2 000095013398003539-002-seq2-ex-99-1.txt FORM OF THIRD AMENDMENT TO RIGHTS AGREEMENT