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OTHER BALANCE SHEET DETAILS
 9 Months Ended
Jul. 31, 2021
Balance Sheet Related Disclosures [Abstract]  
OTHER BALANCE SHEET DETAILS OTHER BALANCE SHEET DETAILS
As of the dates indicated, accrued liabilities and other short-term obligations are comprised of the following (in thousands):
July 31,
2021		October 31,
2020
Compensation, payroll related tax and benefits
$142,713 $135,462 
Warranty48,139 49,868 
Income taxes payable36,526 6,348 
Vacation30,986 26,945 
Finance lease obligations3,395 2,836 
Other111,532 112,673 
 $373,291 $334,132 

The following table summarizes the activity in Ciena’s accrued warranty for the periods indicated (in thousands):
Beginning BalanceCurrent Period ProvisionsSettlementsEnding Balance
Nine Months Ended August 1, 2020$48,498 19,172 (15,504)$52,166 
Nine Months Ended July 31, 2021$49,868 12,726 (14,455)$48,139 
As of the dates indicated, deferred revenue is comprised of the following (in thousands):
July 31,
2021		October 31,
2020
Products$13,380 $17,534 
Services170,519 140,829 
 183,899 158,363 
Less current portion(126,179)(108,700)
Long-term deferred revenue$57,720 $49,663