SEWARD & KISSEL LLP ONE BATTERY PARK PLAZA NEW YORK, NEW YORK 10004 TELEPHONE: (212) 574-1200 FACSIMILE: (212) 480-8421 November 29, 2001 VIA FACSIMILE Michael Carper, Esq. Allied Riser Communications Corporation 1700 Pacific Avenue, Suite 400 Dallas,...

                       XXXXXX & XXXXXX LLP
                     XXX XXXXXXX XXXX XXXXX
                    XXX XXXX, XXX XXXX  00000

                   TELEPHONE:  (000)  000-0000
                   FACSIMILE:  (000)  000-0000

                             November 29, 2001

VIA FACSIMILE

Xxxxxxx Xxxxxx, Esq.
Allied Riser Communications Corporation
0000 Xxxxxxx Xxxxxx, Xxxxx 000
Xxxxxx, Xxxxx  00000


Re: Allied Riser Communication Corporation (the "Company")

Dear Xxxxxxx:

    I have received your letter of yesterday evening.  You have
known of the agreement in principle on the Note repurchase for
many weeks.  You have had our alternative offer for the Company's
equity for nearly a month.  There is no justification for any
further delay.

    Unless we have an acceptable written response from you by the
close of business tomorrow, the Note holders will deem the offers
rejected and withdrawn, and pursue their claims against the
Company and its directors personally.

                             Sincerely yours,


                             /s/ Xxxx X. Xxxxx
                             ---------------------------
                             Xxxx X. Xxxxx

cc: Xx. Xxxxxx X. Xxxxxxxx
    Mr. Xxx Xxxxx
    Mr. R. Xxxxx Xxxxxx
    Xx. Xxxxx X. Xxxxxxxx
    (Via Overnight)

    Xxxxx Day Xxxxxx & Xxxxx
    Attn:  Xxxxxxxx XxXxxxxx, Esq.






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