OTHER BALANCE SHEET DETAILS

As of the dates indicated, other long-term assets are comprised of the following (in thousands):



	October 31,
	2013		2014
Maintenance spares inventory, net	$	61,305	$	54,101
Deferred debt issuance costs, net	15,677		15,160
Restricted cash	2,053		45
Embedded redemption feature	2,740		—
Other	4,605		4,770
	$	86,380	$	74,076

Deferred debt issuance costs are amortized using the straight line method which approximates the effect of the effective interest rate method through the maturity of the related debt. Amortization of debt issuance costs related to our convertible notes payable, term loan (described in Note 14 below) and our ABL Credit Facility (described in Note 15 below), which is included in interest expense, was $5.3 million, $5.4 million and $4.8 million for fiscal 2012, fiscal 2013 and fiscal 2014, respectively.

As of the dates indicated, accrued liabilities and other short-term obligations are comprised of the following (in thousands):



	October 31,
	2013		2014
Compensation, payroll related tax and benefits	98,770		82,207
Warranty	56,303		55,997
Vacation	32,118		35,126
Capital lease obligations	3,079		7,788
Interest payable	6,186		6,409
Other	75,200		89,081
	$	271,656	$	276,608

The following table summarizes the activity in Ciena’s accrued warranty for the fiscal years indicated (in thousands):



Year ended	Beginning						Ending
October 31,	Balance		Provisions		Settlements		Balance
2012	$	47,282	$	33,418	$	25,568	$	55,132
2013	$	55,132	$	24,558	$	23,387	$	56,303
2014	$	56,303	$	22,129	$	22,435	$	55,997

The increase in fiscal 2012 warranty provision was driven primarily by sales that included longer-term support obligations and technical support requirements from additional geographies. The decreases in both fiscal 2013 and fiscal 2014 warranty provisions were primarily due to lower failure rates and reduced costs due to efficiencies.

As of the dates indicated, deferred revenue is comprised of the following (in thousands):



	October 31,
	2013			2014
Products	$	36,671		$	50,457
Services	75,499			95,161
	112,170			145,618
Less current portion	(88,550		)	(104,688		)
Long-term deferred revenue	$	23,620		$	40,930

As of the dates indicated, other long-term obligations are comprised of the following (in thousands):



	October 31,
	2013		2014
Income tax liability	$	9,083	$	14,342
Deferred tenant allowance	11,775		10,839
Straight-line rent	4,127		5,174
Capital lease obligations	1,983		4,589
Interest rate swap derivative	—		2,083
Other	7,785		8,363
	$	34,753	$	45,390