Company:  ACME PACKET INC
Form Type:  S-8
Filing Date:  2/24/2012 
CIK:  0001130258 
Address:  100 CROSBY DRIVE 
City, State, Zip:  BEDFORD, Massachusetts 01730 
Telephone:  781-328-4400 
Fiscal Year:  12/31 
Description of Business
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  FORM S-8
    CALCULATION OF REGISTRATION FEE
    EXPLANATORY NOTE
    PART II
      Item 3. Incorporation of Documents by Reference
    Item 5. Interests of Named Experts and Counsel.
      Item 8. Exhibits
    SIGNATURES AND POWER OF ATTORNEY
    EXHIBIT INDEX
  EXHIBIT 5.1
  EXHIBIT 23.1
    Consent of Independent Registered Public Accounting Firm
  EXHIBIT 24