U.S. Geological Survey, Branch Of Acquisition and Federal Assistance, Box 25046, Denver Federal Center, Denver, CO 80225-0046

66 -- MASTER EARTH STATION (MES OR HUB) UPGRADE FROM SKYLINX.25 TO SKYRELAY DUE 082100 POC POC: Sandie Williamson, 303-236-5900, ext. 332 E-MAIL: USGS, CR, Acquisition and Federal Assistance, slwillia@usgs.gov. The US National Seismograph Network (USNSN), Seismograph Networks Project, Central Region Geologic Hazards Team, U.S. Geological Survey operates a private satellite network in order to collect data from remote seismograph stations and to provide data to cooperating partners. The current system, SkyLinX system will no longer be supported or maintained. This requirement is to replace or upgrade the existing system to a level that will be maintaniable for a reasonable period of time. It is expected that the upgrade shall utilize existing equipment to the greatest extent practicable. The current SkyLinX system is comprised of a hub and approximately 60 VSATs. The hub system includes RF(radio frequency), IF(intermediate frequency), packet switch, network control, host adapter and console subsystems along with ancillary cabling and software. The VSAT systems include antenna, ORU (outdoor RF or feedhorn unit) and DPU (digital processing or indoor unit) along with cabling, firmware, and software. The upgrade (SkyRelay) system must provide a complete functional replacement for the existing SkyLinX system. The upgrade shall utilize the existig 4.5m Vertex antenna and RF shelter. High power amplifiers sufficient to drive two 64 Kbps outlinks (minimum) at a level sufficient to achieve 98% availability at the weakest link are required. One 64 Kbps outlink (2 TMCCs or transmit master communications controllers) and five 64 kbps returnlinks (6 RMCCs or receive master communications controlls) are required. One redundant Switching Element is required. One redundant NAM (network access module) is required. It is anticipated that data will be delivered in the X.25 protocal via 64 or 128 Kbps synchronous ports. One NMS (network management system) server is required at least one NMS clinet. It is acceptable for the client/server software to run n the same computer. The older 6500 ORUS need to be upgrade. All data input/output will be by means of the standard asynchronous ports at speeds of 9.6 and 19.2 Kbps. The DPU must be configurable for XON/XOFF flow control in one or both directions on each of two ports and must provide DSR active when a call is upon each of two ports, and must provide BREAK of at least 8 s duration on at least one port. The VSAT Equipment shall be compatible with existing Prodelin 1.8m antennas and existing cabling, no antennas or IFL cables will be required. we consider the only available source to be the SkyRelay model 4576/6600 DPU/ORU to be compatible. The SkyLinX provides a 4ms pulse with the leading edge synchronized with the SOF signal from the hub on the DSR line of port 3. At the same time an ASCII message including the SOF number is trnasmitted out of port 3. The free running oscillator in the seismic data logger is synchronized to the known time of one SOF pulse and the known interval between SOF pulses. Based on the information at this time and in accordance with 41 U.S.C 253 (c)(1), implemented by FAR 6.302-1, the Government considers the items specified as a sole source from VIA SAT, Inc., Norcorss, GA., and proposes to negotiate a contract with that firm on that basis. However, should additional sources be identified, they will be considered. Firms who feel that they can furnish the requied items, based on the criteria specified herein are invited to submit in writing an affirmative response to this announcement. An affirmative response would include literature, brochures and such materials which correspond to the required items stated herein. This information will be evaluated and used to determine if competition exists. Since no solicitation document exists, requests for such documents without accompanying information will be considered non-responsive to this request without further consideration. See Note 12 and 22. Posted 07/05/00 (W-SN471666). (0187)

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