EXHIBIT 99.5 [FELDMAN WEINSTEIN LLP LETTERHEAD] June 12, 2003 VIA FACSIMILE (508) 248-5588 ------------- FiberCore, Inc. 253 Worcester Road P.O. Box 180 Charlton, Massachusetts 01507 Attn: Steve Philips Re: 5% Convertible Subordinated Debentures and...

                                                                    EXHIBIT 99.5

                       [▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇ LLP LETTERHEAD]



June 12, 2003

VIA FACSIMILE (▇▇▇) ▇▇▇-▇▇▇▇
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FiberCore, Inc.
▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇
▇.▇. Box 180
Charlton, Massachusetts 01507
Attn: ▇▇▇▇▇ ▇▇▇▇▇▇▇

            Re:   5% Convertible Subordinated Debentures and Warrants of
                  Fibercore, Inc.
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Dear ▇▇. ▇▇▇▇▇▇▇▇:

      I have been instucted by my clients, Riverview Group, LLC, Laterman & Co.
and Forevergreen Partners (the "Investors"), to fomally notify Fibercore, Inc.
and Fleet National Bank, N.A. that Fibercore, Inc. is in default of the
Company's 5% Convertible Subordinated Debentures.

      The Investors reserve all rights, legal, equitable or otherwise, in this
matter.

                                    Very truly yours,

                                    /s/ ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇

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