[1]

In June 2011, CCOC amended the senior secured revolving credit facility ("Revolver") to increase the aggregate revolving commitment availability by $50.0 million to a total revolving commitment availability of $450.0 million, subject to certain restrictions based on the maintenance of financial covenants in the 2007 Credit Agreement. As of June 30, 2011, the undrawn availability under the Revolver is $262.0 million.

[2]

Represents the weighted-average stated interest rate.

[3]

The Revolver bears interest at a rate per annum, at the election of CCOC, equal to (i) the greater of the prime rate of The Royal Bank of Scotland plc and the Federal Funds Effective Rate plus 0.5%, plus a credit spread ranging from 1.0% to 1.4% or (ii) LIBOR plus a credit spread ranging from 2.0% to 2.4%, in each case based on the Company's consolidated leverage ratio. The 2007 Term Loans bear interest at a rate per annum, at CCOC's election, equal to (i) the greater of the prime rate of The Royal Bank of Scotland plc and the Federal Funds Effective Rate plus 0.5% or (ii) LIBOR plus 1.5%.

[4]

If the respective series of the January 2010 Tower Revenue Notes and August 2010 Tower Revenue Notes are not paid in full on or prior to 2015, 2017 and 2020, as applicable, then Excess Cash Flow (as defined in the indenture) of the issuers (of such notes) will be used to repay principal of the applicable series and class of the 2010 Tower Revenue Notes, and additional interest (by an additional approximately 5% per annum) will accrue on the respective 2010 Tower Revenue Notes. The January 2010 Tower Revenue Notes consist of three series of notes with principal amounts of $300.0 million, $350.0 million and $1.3 billion, having anticipated repayment dates in 2015, 2017 and 2020, respectively. The August 2010 Tower Revenue Notes consist of three series of notes with principal amounts of $250.0 million, $300.0 million and $1.0 billion, having anticipated repayment dates in 2015, 2017 and 2020, respectively.

[5]

The 2009 Securitized Notes consist of $155.3 million of principal as of June 30, 2011 that amortizes through 2019, and $70.0 million of principal as of June 30, 2011 that amortizes during the period beginning in 2019 and ending in 2029.

[6]

The effective yield is approximately 11.3%, inclusive of the discount.

[7]

The effective yield is approximately 8.2%, inclusive of the discount.

[8]

The effective yield is approximately 7.2%, inclusive of the discount.

[9]

The Company's capital leases and other obligations bear interest rates up to 9% and mature in periods ranging from less than one year to approximately 20 years.