**EXHIBIT      10.68**

**JOINDER      AGREEMENT**

**“Agreement”**
**“New      Lender”**
**“Administrative      Agent”**
**“Standard      Terms and Conditions”**

| 1.     | New                Lender:           | SunTrust                Bank                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
|--------|--------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   |                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| 2.     | Borrower:                            | ABOVENET                COMMUNICATIONS, INC., a Delaware corporation (the “**Borrower                Representative**”)                and such other persons named under, or joined to, the Credit Agreement                as                a Borrower from time to time                                                                                                                                                                                                                                                                                       |
|   |                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| 3.     | Administrative                Agent: | SOCIETE                GENERALE, as Administrative Agent under the Credit                Agreement                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
|   |                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| 4.     | Credit                Agreement:     | Credit                and Guaranty Agreement, dated as of February 29, 2008 (as the same                may be                amended, restated, supplemented, modified, renewed, refinanced, extended                or otherwise modified from time to time), by and among the Borrowers,                the                Guarantors from time to time party thereto, the financial institutions                named therein as Lenders (the “**Lenders**”                and each, a “**Lender**”)                and the Administrative Agent. |
|   |                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| 5.     | New                Loan Commitment:  | $30,000,000,                in aggregate, to be allocated on a pro rata basis as shown in the                following tables.                                                                                                                                                                                                                                                                                                                                                                                                                                                |

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**A.      Revolving Commitments**

| **Lender**                                      | **Amount**                 | **Percentage** |
|-------------------------------------------------|----------------------------|----------------|
| Societe                Generale                 | $10,500,000                | 38.889%        |
| CIT                Lending Services Corporation | $                7,500,000 | 27.778%        |
| SunTrust                Bank                    | $                9,000,000 | 33.333%        |
| **TOTAL**                                       | **$27,000,000**            | **100.000%**   |

**B.      Term Loan Commitments**

| **Lender**                                      | **Amount**      | **Percentage** |
|-------------------------------------------------|-----------------|----------------|
| Societe                Generale                 | $14,000,000     | 38.889%        |
| CIT                Lending Services Corporation | $10,000,000     | 27.778%        |
| SunTrust                Bank                    | $12,000,000     | 33.333%        |
| **TOTAL**                                       | **$36,000,000** | **100.000%**   |

**C.      Delayed Draw Commitments**

| **Lender**                                      | **Amount**                 | **Percentage** |
|-------------------------------------------------|----------------------------|----------------|
| Societe                Generale                 | $10,500,000                | 38.889%        |
| CIT                Lending Services Corporation | $                7,500,000 | 27.778%        |
| SunTrust                Bank                    | $                9,000,000 | 33.333%        |
| **TOTAL**                                       | **$27,000,000**            | **100.000%**   |

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**SUNTRUST      BANK**

**SOCIETE      GENERALE**

**ABOVENET      COMMUNICATIONS, INC.**

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**STANDARD      TERMS AND CONDITIONS **

| 1. | Representations                and Warranties. |
|----|------------------------------------------------|

| 2. | General                Provisions. This                Agreement shall be binding upon, and inure to the benefit of, the                parties                hereto and their respective successors and assigns. This Agreement                may be                executed in any number of counterparts, which together shall constitute                one instrument. Delivery of an executed counterpart of a signature                page of                this Agreement by telecopy shall be effective as delivery of a manually                executed counterpart of this Agreement. This Agreement shall be governed                by, and construed in accordance with, the internal laws of the State                of                New York without regard to conflict of laws principles thereof. The                effective date of this Agreement (the “**Effective                Date**”)                shall be the latest of (a) the date of the execution hereof by the                Administrative Agent, the New Lender and the Borrower Representative,                (b)                the delivery by the New Lender to the Administrative Agent of an                Administrative Questionnaire, (c) the payment by the Borrower to                the Administrative Agent for the Administrative Agent’s sole and separate                account                an                advisory fee in accordance with the May 1, 2008 engagement letter                and (d)                October 1, 2008. |
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