Exhibit 24.1

                           LIMITED POWER OF ATTORNEY
                                      FOR
                             SECTION 16(a) FILINGS

        Know all by these presents, that the undersigned hereby constitutes and
appoints each of Christie A. Hill and Kenneth D. Schwarz, representatives of
Primus Telecommunications Group, Incorporated (the "Company"), and Linda Rockett
and Merav Gershtenman, each of Mintz, Levin, Cohn, Ferris, Glovsky and Popeo,
P.C., signing singly, the undersigned's true and lawful attorney-in-fact to:

        (1)     Execute for and on behalf of the undersigned, forms and
authentication documents for EDGAR Filing Access;

        (2)     Do and perform any and all acts for and on behalf of the
undersigned which may be necessary or desirable to complete and execute any such
forms and authentication documents;

        (3)     Execute for and on behalf of the undersigned, in the
undersigned's capacity as an officer, director and/or stockholder of the
Company, Forms 3, 4, and 5 and amendments thereto in accordance with Section
16(a) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"),
and the rules thereunder;

        (4)     Do and perform any and all acts for and on behalf of the
undersigned which may be necessary or desirable to complete and execute any such
Form 3, 4, or 5 and any amendments thereto and timely file such forms with the
Securities and Exchange Commission and any stock exchange or similar authority;
and

        (5)     Take any other action of any type whatsoever which, in the
opinion of such attorney-in-fact, may be legally necessary or desirable in
connection with the foregoing authority, it being understood that the documents
executed by such attorney-in-fact on behalf of the undersigned pursuant to this
Limited Power of Attorney shall be in such form and shall contain such terms and
conditions as such attorney-in-fact may approve in such attorney-in-fact's
discretion.

        The undersigned hereby grants to each such attorney-in-fact full power
and authority to do and perform any and every act and thing whatsoever
requisite, necessary, or proper to be done in the exercise of any of the rights
and powers herein granted, as fully to all intents and purposes as the
undersigned might or could do if personally present, with full power of
substitution or revocation, hereby ratifying and confirming all that such
attorney-in-fact, or such attorney-in-fact's substitute or substitutes, shall
lawfully do or cause to be done by virtue of this Limited Power of Attorney and
the rights and powers herein granted. The undersigned acknowledges that the
foregoing attorneys-in-fact, in serving in such capacity at the request of the
undersigned, are not assuming, nor is the Company assuming, any of the
undersigned's responsibilities to comply with Section 16 of the Exchange Act.

        This Limited Power of Attorney shall remain in full force and effect
until the undersigned is no longer required to file Forms 3, 4, and 5 with
respect to the undersigned's holdings of and transactions in securities issued
by the Company, unless earlier revoked by the undersigned in a signed writing
delivered to the foregoing attorneys-in-fact. This Power of Attorney may be
filed with the Securities and Exchange Commission as a confirming statement of
the authority granted herein.

        IN WITNESS WHEREOF, the undersigned has caused this Limited Power of
Attorney to be executed as of this 10th day of August, 2011.

                                        /s/ Steven D. Scheiwe
                                        ----------------------------------------
                                        Steven D. Scheiwe