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                                 EXHIBIT (A)(6)


                                                                 August 12, 1999

Board of Directors
SpecTran Corporation
50 Hall Road
Sturbridge, Massachusetts  01566

Re: Schedule 14D-9 of SpecTran Corporation filed July 21, 1999

Ladies and Gentlemen:

         Reference is made to our opinion letter dated July 15, 1999 with
respect to the Agreement of Merger, dated as of July 15, 1999, by and among
SpecTran Corporation (the "Company"), Lucent Technologies Inc. ("Lucent"), and
Seattle Acquisition Inc., a wholly-owned subsidiary of Lucent.

         The foregoing opinion letter is provided for the information and
assistance of the Board of Directors of the Company in connection with its
consideration of the transaction contemplated therein and is not to be used,
circulated, quoted or otherwise referred to for any other purpose, nor is it to
be filed with or included in or referred to in whole or in part in any
registration statement, proxy statement or other document, except in accordance
with our prior written consent. We understand that the Company has determined to
include our opinion in the above-referenced Schedule 14-D9. In that regard, we
hereby consent to the reference to the opinion of our Firm under the caption
"Item 4. The Solicitation or Recommendation" and to the inclusion of the
foregoing opinion in the above-referenced Schedule 14D-9. We also consent to the
filing with the Securities and Exchange Commission of this consent letter as an
exhibit to the above-referenced Schedule 14D-9. In giving such consent, we do
not thereby admit that we come within the category of persons whose consent is
required under Section 7 of the Securities Act of 1933 or the rules and
regulations of the Securities and Exchange Commission thereunder.



                                                  Very truly yours,

                                                  LAZARD FRERES & CO. LLC


                                                  By /s/ Melvin L. Heineman
                                                     ----------------------
                                                     Melvin L. Heineman
                                                     Managing Director