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PNSNMC
NATIONAL TECHNICAL INFORMATION MESSAGE /NTIM/ 97-06
NATIONAL WEATHER SERVICE HEADQUARTERS
1130 AM EST MON FEB 3 1997
TO: ALL NATIONAL WEATHER SERVICE CUSTOMERS RECEIVING
FEDERAL AVIATION ADMINISTRATION /FAA/ DATA THROUGH THE
NATIONAL WEATHER SERVICE TELECOMMUNICATION GATEWAY
FROM: THERESE Z. PIERCE
CHIEF-INTEGRATED HYDROMETEOROLOGICAL SERVICES CORE
OFFICE OF METEOROLOGY
SUBJECT: FAA COMMUNICATION SYSTEM UPGRADE ON FEBRUARY 4...1997
/THE FOLLOWING INFORMATION WAS PROVIDED BY AL MONGEON...NWS
TELECOMMUNICATION GATEWAY AND CHRISTINE ALEX...OFFICE OF
METEOROLOGY/
ON FEBRUARY 4...1997...THE FAA PLANS TO UPGRADE THEIR
COMMUNICATIONS SYSTEM BACKBONE SOFTWARE AND HARDWARE CONTROLLING
A PORTION OF THE INTERFACE WITH THE NWS.
THE PLAN IS TO TAKE THE NADIN I AT THE FAA'S ATLANTA NADIN SWITCH
DOWN FOR THE UPGRADE AT 0415 UTC ON FEBRUARY 4 1997. THE OUTAGE
SHOULD LAST NO MORE THAN 30 MINUTES; HOWEVER, THE FAA IS
ALLOCATING 60 MINUTES TO ACCOUNT FOR UNFORESEEN CIRCUMSTANCES.
ONCE SERVICE HAS BEEN RESTORED AT THE FAA'S ATLANTA NADIN
SWITCH...A PERIOD OF 60 MINUTES WILL BE ALLOWED FOR SERVICE TO
STABILIZE. IF NO PROBLEMS ARE ENCOUNTERED DURING THAT TIME THE
FAA'S SALT LAKE CITY NADIN I SYSTEM WILL BE UPGRADED ON A SIMILAR
SCHEDULE BEGINNING 0615 UTC. NO HARDWARE UPGRADE IS NECESSARY AT
SALT LAKE CITY.
THE FAA'S SALT LAKE CITY MESSAGE SWITCHING CENTER WILL COMMENCE
THEIR SOFTWARE UPDATE AT 0615 UTC ON FEBRUARY 4TH AFTER
RESUMPTION OF SERVICE AT THE FAA'S ATLANTA SWITCHING CENTER.
DURING THESE TWO PLANNED UPGRADES...SERVICE INTERRUPTIONS MAY BE
EXPERIENCED DELAYING DELIVERY OF PRODUCTS FROM THE FAA TO NWS.
THE OUTAGES DO NOT DIRECTLY AFFECT THE NWS TELECOMMUNICATION
GATEWAY-FAA WEATHER MESSAGE SWITCHING CENTER REPLACEMENT
INTERFACE WHICH USES NADIN II. DATA FROM THE AERONAUTICAL FIXED
TELECOMMUNICATION NETWORK /AFTN/ WHICH USES THE NADIN I SYSTEM
WILL BE DELAYED.
FURTHER INFORMATION WILL BE PROVIDED IF NECESSARY.
END
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