LAW OFFICES OF LEONARD R. GLASS, P.A. 45 Central Ave. P.O. Box 579 Tenafly, New Jersey 07670-0579 (201) 894-9300 December 29, 1999 CTC Communications Group, Inc. 220 Bear Hill Road Waltham MA 02451 Re: Amendment No. 1 to Registration Statement on Form S-8 Under the Securities Act of 1933 Ladies and Gentlemen: We hereby consent to the use of our name under Item 5, Interest of Named Experts and Counsel, in the Post-Effective Amendment No. 1 to the Form S-8 Registration Statement. Leonard R. Glass, Esq., a member of this firm, is a stockholder of CTC Communications Group, Inc. Very truly yours, /s/ LAW OFFICES OF LEONARD R. GLASS, P.A. ------------------------------------------------- LAW OFFICES OF LEONARD R. GLASS, P.A.