Accounts Receivable

3 Months Ended

Jan. 31, 2012

Receivables [Abstract]

ACCOUNTS RECEIVABLE

ACCOUNTS RECEIVABLE

Allowance for doubtful accounts was $0.7 million and $1.6 million as of October 31, 2011 and January 31, 2012, respectively. Ciena has not historically experienced a significant amount of bad debt expense.