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Exhibit 24.2
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POWER OF ATTORNEY
The undersigned constitutes and appoints Arunas A. Chesonis, Daniel J.
Venuti and Richard E. Ottalagana, and each of them, his true and lawful
attorneys-in-fact and agents, with full power of substitution and
resubstitution, from such person and in such person's name, place and stead, in
any and all capacities, to sign any and all amendments (including post-effective
amendments) to the Form S-1 Registration Statement of PaeTec Corp. (SEC File No.
333-34770) or any Registration Statement relating to that Registration Statement
under Rule 462 under the Securities Act of 1933 and to file the same, with all
exhibits thereto and all documents in connection therewith, with the Securities
and Exchange Commission, granting unto said attorneys-in-fact and agents, and
each of them, full power and authority to do and perform each and every act and
thing requisite and necessary to be done as fully to all intents and purposes as
he might or could do in person, hereby ratifying and confirming all that said
attorneys-in-fact and agents or any of them, or his substitutes, may lawfully do
or cause to be done by virtue hereof.
IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney as
of this 11th day of August, 2000.
/s/ Jeffrey L. Burke Director
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Jeffrey L. Burke
