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Acquired Intangible Assets
 9 Months Ended
Mar. 31, 2012
Acquired Intangible Assets [Abstract]  
Acquired Intangible Assets
ACQUIRED INTANGIBLE ASSETS
 
 
Technology
Assets
 
Customer
Assets
 
Total
Net book value, June 30, 2011
$
203,630

 
$
141,365

 
$
344,995

Purchase of patents*
575

 
—

 
575

Acquisition of MessageManager (note 17)
580

 
1,186

 
1,766

Acquisition of Operitel (note 17)
2,761

 
1,840

 
4,601

Acquisition of Global 360 (note 17)
40,600

 
58,100

 
98,700

Amortization expense
(63,307
)
 
(39,948
)
 
(103,255
)
Adjustments on account of foreign exchange
(83
)
 
(45
)
 
(128
)
Net book value, March 31, 2012
$
184,756

 
$
162,498

 
$
347,254



The weighted average amortization period for acquired technology and customer intangible assets is approximately 5 years and 7 years, respectively.
The following table shows the estimated future amortization expense for the fiscal years indicated below. This calculation assumes no future adjustments to acquired intangible assets:
 
 
Fiscal years ending
June  30,
2012 (three months ending June 30)
$
34,643

2013
135,560

2014
76,978

2015
53,280

2016 and beyond
46,793

 
 
Total
$
347,254

 
*
On November 15, 2011, we acquired certain patents. The total purchase price was $0.6 million. Payment terms under the agreement required us to pay $0.2 million upon signing the purchase agreement, $0.2 million 18 months following the purchase date and a final payment of $0.2 million two years following the purchase date. The purchase of these patents is considered to be the acquisition of “defensive intangible assets” and has been accounted for under ASC Topic 350-30-25 “General Intangibles Other than Goodwill”, as well as in accordance with ASC Topic 805-50-5 “Acquisition of Assets Rather than a Business”. The patents have an amortization period of approximately 11 years.