Exhibit 23.5 Independent Auditors' Consent The Board of Directors VIALOG Corporation: We consent to the incorporation by reference herein of our report dated February 26, 1999, relating to the balance sheets of A Business Conference-Call, Inc. as of December 31, 1997 and 1998, and the related statements of income and retained earnings and cash flows for each of the years in the three-year period ended December 31, 1998, which report appears in the December 31, 1999 annual report on Form 10-K/A of VIALOG Corporation. /s/ KPMG LLP Boston, Massachusetts May 1, 2001