OTHER BALANCE SHEET DETAILS

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



	October 31, 2014		January 31, 2015
Maintenance spares, net	$	54,101	$	65,201
Deferred debt issuance costs, net	15,160		14,012
Other	4,815		5,561
	$	74,076	$	84,774

Deferred debt issuance costs relate to our convertible notes payable (described in Note 15 below), Term Loan (described in Note 15 below) and our ABL Credit Facility (described in Note 16 below). 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. The amortization of deferred debt issuance costs is included in interest expense, and was $1.2 million and $1.3 million during the first three months of fiscal 2014 and fiscal 2015, respectively.

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



	October 31, 2014		January 31, 2015
Compensation, payroll related tax and benefits	82,207		91,017
Warranty	55,997		53,382
Vacation	35,126		31,533
Capital lease obligations	7,788		6,229
Interest payable	6,409		8,572
Other	89,081		99,251
	$	276,608	$	289,984

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



Three months ended	Beginning					Ending
January 31,	Balance		Provisions	Settlements		Balance
2014	$	56,303	7,974	(6,188	)	$	58,089
2015	$	55,997	2,293	(4,908	)	$	53,382

The decrease in the first quarter of fiscal 2015 warranty provision was due to lower failure rates and reduced component and labor repair costs.

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



	October 31, 2014			January 31, 2015
Products	$	50,457		$	58,041
Services	95,161			94,497
	145,618			152,538
Less current portion	(104,688		)	(106,486		)
Long-term deferred revenue	$	40,930		$	46,052

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



	October 31, 2014		January 31, 2015
Income tax liability	$	14,342	$	14,110
Deferred tenant allowance	10,839		10,576
Straight-line rent	5,174		5,330
Capital lease obligations	4,589		3,105
Forward starting interest rate swap	2,083		4,648
Other	8,363		6,827
	$	45,390	$	44,596