Exhibit 10.50 FIRST AMENDMENT TO MASTER COLLOCATION AGREEMENT This First Amendment (the "Amendment") to the Master Collocation Agreement dated December 22, 2000 (the "Agreement") by and between SBC Communications Inc. ("SBC") and Network Access...Master Collocation Agreement • March 30th, 2001 • Network Access Solutions Corp • Telephone communications (no radiotelephone)
Exhibit 10.44 MASTER COLLOCATION AGREEMENT between SBC COMMUNICATIONS INC. and NETWORK ACCESS SOLUTIONS CORPORATION This Agreement (the "Agreement") is entered into as of December 22, 2000, by and between SBC Communications Inc. ("SBC") and Network...Master Collocation Agreement • March 30th, 2001 • Network Access Solutions Corp • Telephone communications (no radiotelephone) • Delaware
