Bid Office, SPAWARSYSCEN, Code D21B, 53570 Silvergate Avenue, Bldg. A33, Room 0061, San Diego, CA 92152-5112

61 -- MODIFICATION: UNINTERRUPTIBLE POWER SUPPLY SOL N66001-00-Q-3261 DUE 022200 POC Purchasing Agent, Ms. Gina Bennett, D212, (619) 553-5208. Contracting Officer, Ms. Sylvia Proffit, D211, (619) 553-3292. ****MODIFICATION TO SOLICITATION NUMBER N66001-00-Q-3261**** RECORD NUMBER 2518PR610001, CBD ISSUE DATE 01/24/00. This modification is issued as follows: (1) correct the quantity from 1 each to 8 each. (2) Change the due date from 02/07/00 to 02/22/00. (3) Incorporate the following salient characteristics of Uninterruptible power source: (a) Electrical Characteristics: 110VAC single phase @ 2KVA; Minimum 10 minute operating time under 1500 watt load; instantaneous switching at loss of AC input; automatic UPS shutdown; automatic battery charging. (b) Software Controlled Parameters: automatic battery test; under voltage protection; prolonged overload protection; automatic reset; audible alarm; battle mode; low battery level; input power limit. (c) Physical Characteristics: 19"W X 8"H X 30"D; 150 lbs. (d) Communication Control Interface: Standard RS-232 thru DB9 female connector. (e) Interface Dry Contacts: DB9 female connector; Pin 3: remote UPS shutdown, by applying a voltage between + 5 and + 15 VDC onPin 3, the UPS is commanded to shutdown. This function is available at all times. (f) Communication Parameters: Standard RS-232 ASCII communication protocol; Baud rate: 1200; Data bits: 7; Stop bits: 1; Parity: Even; Mode: Full-duplex. (g) Software Control Commands: Host Commands: 44 three character proprietary ASCII mnemonic sequences. Status report commands: Major status reports: 24 three character proprietary ASCII mnemonic sequences. Extended status reports: 58 three character proprietary ASCII mnemonic sequences. Battery test reponse status reports: 7 three character proprietary ASCII mnemonic sequences. Diagnostic Status Reports: 8 three character proprietary ASCII mnemonic sequences. Posted 02/04/00 (W-SN422195). (0035)

Loren Data Corp. http://www.ld.com (SYN# 0276 20000208\61-0002.SOL)