EXTENSION AGREEMENT

                                                                 Exhibit 10.1

SBC                                Maureen Merkle          SBC Services, Inc.

                                  President               530 McCullough

                                   Procurement             Room 1415

                                                         San Antonio, TX   78215

                                                         210.886.3131   Phone

                                                          210.886.5293   Fax

                                                         mm2042@sbc.com

May 25, 2005

Mr. Jeff Storey

President and CEO

WilTel Communications

One Technology Center, Room TC-15A

Tulsa, OK   74103

Dear Jeff,

As discussed, this correspondence is to formalize our verbal agreement that

WilTel and SBC will continue to utilize the existing transport rate structure

currently in effect for a period not to exceed an additional thirty-one (31)

days from the May 31, 2005 expiration of the existing agreement and to establish

a new expiration date of July 1, 2005. Through this extension, we are agreeing

to extend the current rates esta