X0101 EFFECT 33 LIVE 2011-06-06 16:00:00

S-4

0001372041 PAETEC Holding Corp. 333-174546 0000742550 XETA TECHNOLOGIES INC 333-174546-49 0001522321 Pyramid Communication Services, Inc. 333-174546-48 0001069588 PAETEC Corp. 333-174546-47 0001421863 PAETEC Integrated Solutions Group, Inc. 333-174546-46 0001421919 PAETEC iTel, L.L.C. 333-174546-45 0001421862 PaeTec Software Corp. 333-174546-44 0001054290 US LEC LLC 333-174546-43 0001307319 US LEC of Alabama LLC 333-174546-42 0001307324 US LEC of Florida LLC 333-174546-41 0001307327 US LEC of Maryland LLC 333-174546-40 0001307328 US LEC of North Carolina LLC 333-174546-39 0001307330 US LEC of South Carolina LLC 333-174546-38 0001307331 US LEC of Tennessee LLC 333-174546-37 0001421860 PaeTec Communications, Inc. 333-174546-36 0001421859 PaeTec Communications of Virginia, Inc. 333-174546-35 0001307321 US LEC Communications LLC 333-174546-34 0001307325 US LEC of Georgia LLC 333-174546-33 0001307329 US LEC of Pennsylvania LLC 333-174546-32 0001307335 US LEC of Virginia L.L.C. 333-174546-31 0001472232 Allworx Corp. 333-174546-30 0001139900 MPX INC 333-174546-29 0001472231 Technology Resource Solutions, Inc. 333-174546-28 0000919943 McLeodUSA LLC 333-174546-27 0001388935 McLeodUSA Information Services LLC 333-174546-26 0001388938 McLeodUSA Telecommunications Services, L.L.C. 333-174546-25 0001388937 McLeodUSA Purchasing, L.L.C. 333-174546-24 0001492547 U.S. Energy Partners LLC 333-174546-23 0001492537 PAETEC Realty LLC 333-174546-22 0001118044 QUAGGA CORP 333-174546-21 0001089173 CAVALIER TELEPHONE CORP 333-174546-20 0001521718 CavTel Holdings, LLC 333-174546-19 0001521577 Cavalier Telephone, L.L.C. 333-174546-18 0001521578 Cavalier Telephone Mid-Atlantic, L.L.C. 333-174546-17 0001521431 SM Holdings, LLC 333-174546-16 0001521581 Cavalier IP TV, LLC 333-174546-15 0001293172 Elantic Networks Inc 333-174546-14 0001521429 Intellifiber Networks, Inc. 333-174546-13 0001521579 Cavalier Services, LLC 333-174546-12 0000948545 TALK AMERICA HOLDINGS INC 333-174546-11 0001521425 Talk America Inc. 333-174546-10 0001521627 TC Services Holding Co., Inc. 333-174546-09 0001234293 LDMI TELECOMMUNICATIONS INC 333-174546-08 0001521557 NT Corp 333-174546-07 0001521430 Network Telephone Corp 333-174546-06 0001521717 Compco, Inc. 333-174546-05 0001521426 Talk America of Virginia, Inc. 333-174546-04 0001048764 ACCESS ONE COMMUNICATIONS CORP 333-174546-03 0001084443 OMNICALL INC 333-174546-02 0001521623 Other Phone Company, Inc. 333-174546-01