OTHER BALANCE SHEET DETAILS

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



	April 30, 2016		October 31, 2015
Maintenance spares, net	$	54,441	$	55,259
Deferred debt issuance costs, net	12,608		10,820
Financing receivable	—		10,107
Other	10,002		8,470
	$	77,051	$	84,656

Deferred debt issuance costs relate to Ciena's convertible notes payable (described in Note 17 below), term loans (described in Note 17 below) and ABL Credit Facility (described in Note 18 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 $2.1 million and $2.5 million during the first six months of fiscal 2016 and 2015, respectively.

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



	April 30, 2016		October 31, 2015
Compensation, payroll related tax and benefits	$	75,444	$	109,466
Warranty	56,021		56,654
Vacation	38,285		34,189
Capital lease obligations	3,135		4,923
Interest payable	5,265		5,389
Other	104,946		105,662
	$	283,096	$	316,283

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



Six months ended	Beginning					Ending
April 30,	Balance		Provisions	Settlements		Balance
2015	$	55,997	7,658	(9,696	)	$	53,959
2016	$	56,654	9,563	(10,196	)	$	56,021

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



	April 30, 2016			October 31, 2015
Products	$	49,191		$	66,527
Services	137,841			122,546
	187,032			189,073
Less current portion	(116,799		)	(126,111		)
Long-term deferred revenue	$	70,233		$	62,962

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



	April 30, 2016		October 31, 2015
Construction liability	$	42,337	$	18,663
Capital lease obligations	25,070		13,794
Income tax liability	12,244		13,308
Deferred tenant allowance	9,553		9,807
Straight-line rent	6,749		6,237
Forward starting interest rate swap	5,428		5,522
Other	5,436		5,209
	$	106,817	$	72,540

Ciena capitalizes construction in progress and records a corresponding long-term liability for build-to-suit lease agreements where Ciena is considered the owner during the construction period for accounting purposes.

The following is a schedule by fiscal year of future minimum lease payments under capital leases and the present value of minimum lease payments as of April 30, 2016 (in thousands):



Period ended October 31,
2016 (remaining six months)	$	3,196
2017	3,446
2018	3,108
2019	2,896
2020	2,550
Thereafter	32,002
Net minimum capital lease payments	47,198
Less: Amount representing interest	(18,993		)
Present value of minimum lease payments	28,205
Less: Current portion of present value of minimum lease payments	(3,135		)
Long-term portion of present value of minimum lease payments	$	25,070