Department of the Treasury, Internal Revenue Service (IRS), National Office Procurement (A:P), 6009 Oxon Hill Road, Suite 700, Oxon Hill, MD, 20745

D -- DIGITAL TELECOMMUNICATIONS SWITCHING (DTS) SYSTEM SERVICES SOL TIRNO-00-R-00024 DUE 072700 POC Catia Ellsworth, Contract Specialist, Phone 202-283-1344, Fax 202-283-1532, Email catia.f.ellsworth@irs.gov-- Robert Bannerman, Contracting Officer, Phone 202-283-1223, Fax 202-283-1532, Email WEB: Visit this URL for the latest information about this, http://www.eps.gov/cgi-bin/WebObjects/EPS?ACode=M&ProjID=TIRNO-00-R-00 024&LocID=1764. E-MAIL: Catia Ellsworth, catia.f.ellsworth@irs.gov. Solicitation No. TIRNO-00-R-00024 dated June 8, 2000 is hereby amended as follows: 1. Replace entire Section B (text portion) of the solicitation with the enclosed pages (B-1 through B-6). Changes have been highlighted. 2. Replace Section B, Base Year spreadsheets, with the enclosed pages (B-7 through B-10). Highlighted change occurred only under CLIN 0006AD (removed a zero). 3. Replace Section B, Summary of Base Year and 4 Options spreadsheets, with the enclosed pages(B-27 through B-30). Added on page B-30 the present value factor for each year. 4. Replace entire Section F of the solicitation with the enclosed pages F-1 through F-16. Changes have been highlighted. 5. Replace entire Section J, J.20 Attachment T -- Compliance Matrix, with the enclosed pages J-238 through J-243. Changes have been highlighted. 6. Section L, replace page L-10 with the enclosed page L-10. Changes are highlighted. 7. Section L, replace page L-13 with the enclosed page L-13. The reference to C.9.1 has been deleted. 8. Section L, replace pages L-14 through L-18 with the enclosed pages L-14 through L-18. Changes made on page L-14 and L-15 are highlighted. No changes are made to pages L-16 though L-18 except repagination. 9. Section L, replace page L-20 with the enclosed page L-20. The proposal due date has been changed to make it consistent with the Standard Form 33. 10. Section M, replace page M-5 with the enclosed page M-5. Changed "%" to "points". 11. Replacement pages should be appropriately inserted in copies of the solicitation. 12. The proposal due date remains the same. Go to www.procurement.irs.treas.gov/dts2/dts.htm and click on Amendment 0001 for replacement pages. Posted 07/06/00 (D-SN472012). (0188)

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