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ACCOUNTS RECEIVABLE (Tables)
12 Months Ended
Nov. 02, 2024
Receivables [Abstract]  
Schedule of Activity in Allowance for Doubtful Accounts The following table summarizes the activity in Ciena’s allowance for credit losses for the fiscal years indicated (in thousands):
Year EndedBeginning BalanceProvisionsNet DeductionsEnding Balance
October 29, 2022(1)
$10,912 $4,199 $4,153 $10,958 
October 28, 2023
$10,958 $5,718 $5,022 $11,654 
November 2, 2024
$11,654 $7,996 $9,770 $9,880 
(1) On March 7, 2022, Ciena announced its decision to suspend its business operations in Russia. As a result, Ciena’s allowance for doubtful accounts includes a provision for a significant asset impairment of $1.8 million for a trade receivable related to this decision.