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Other Balance Sheet Details
6 Months Ended
Apr. 30, 2012
Balance Sheet Related Disclosures [Abstract]  
OTHER BALANCE SHEET DETAILS
OTHER BALANCE SHEET DETAILS
As of the dates indicated, other long-term assets are comprised of the following (in thousands):

 
October 31, 2011
 
April 30, 2012
Maintenance spares inventory, net
$
50,442

 
$
52,130

Deferred debt issuance costs, net
23,481

 
20,814

Embedded redemption feature
7,020

 
2,290

Restricted cash
27,507

 
29,265

Other
5,673

 
4,997

 
$
114,123

 
$
109,496



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, which is included in interest expense, was $2.7 million during the first six months of fiscal 2011 and fiscal 2012, respectively.
As of the dates indicated, accrued liabilities are comprised of the following (in thousands):
 
October 31, 2011
 
April 30, 2012
Warranty
$
47,282

 
$
51,104

Compensation, payroll related tax and benefits
51,808

 
52,563

Vacation
27,808

 
30,724

Current restructuring liabilities
664

 
1,230

Interest payable
4,248

 
4,180

Other
65,194

 
64,155

 
$
197,004

 
$
203,956



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

 
 
 
 
 
 
 
Balance at
Six months ended
Beginning
 
 
 
 
 
end of
Apr. 30,
Balance
 
Provisions
 
Settlements
 
period
2011
$
54,372

 
5,646

 
(12,766
)
 
$
47,252

2012
$
47,282

 
16,615

 
(12,793
)
 
$
51,104


As a result of the substantial completion of integration activities related to the MEN Business, Ciena consolidated certain support operations and processes during the first quarter of fiscal 2011, resulting in a reduction in costs to service future warranty obligations. As a result of the lower expected costs, Ciena reduced its warranty liability by $6.9 million, which had the effect of reducing the provisions in the table above.
As of the dates indicated, deferred revenue is comprised of the following (in thousands):

 
October 31, 2011
 
April 30, 2012
Products
$
42,915

 
$
42,635

Services
80,883

 
87,199

 
123,798

 
129,834

Less current portion
(99,373
)
 
(107,100
)
Long-term deferred revenue
$
24,425

 
$
22,734