Exhibit 4.8 CYRAS SYSTEMS, INC. 4 1/2% Convertible Subordinated Notes Due August 15, 2005 FIRST SUPPLEMENTAL INDENTURE Dated as of November 27, 2000
Ciena Corp • May 17th, 2001 • Telephone & telegraph apparatus • New York
Company
Filed
May 17th, 2001
Industry
Jurisdiction

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to INDENTURE Dated as of August 18, 2000
Ciena Corp • May 17th, 2001 • Telephone & telegraph apparatus • New York
Company
Filed
May 17th, 2001
Industry
Jurisdiction

Exhibit 4.9 CYRAS SYSTEMS, INC. 4 1/2% Convertible Subordinated Notes Due August 15, 2005 SECOND SUPPLEMENTAL INDENTURE Dated as of November 28, 2000
Ciena Corp • May 17th, 2001 • Telephone & telegraph apparatus • New York
Company
Filed
May 17th, 2001
Industry
Jurisdiction

0000950133-01-501246 Sample Contracts

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