The Telephone Information Briefing Service (TIBS), provided by Flight Service Stations (FSSs), is a continuous recording of meteorological and aeronautical information; available by telephone throughout Alaska
Each FSS provides route and/or area briefings in addition to airspace procedures and special announcements (if applicable) concerning aviation interests may also be available
Depending on user demand, other items may be provided, such as: Aviation Routine Weather Reports (METAR) observations, Terminal Aerodrome Forecasts, wind/temperatures aloft forecasts, etc.
Telephone Information Briefing Service Function:
A TOUCH-TONE™ telephone is necessary to fully utilize the TIBS program
Pilots are encouraged to avail themselves of this service
TIBS locations are found at FSS sites and can be accessed by use of 1-800-WX BRIEF (992-7433) toll free number or specific published TIBS telephone numbers in certain areas
Consult the "FSS Telephone Numbers" section of the Chart Supplement U.S. or the Alaska or Pacific Chart Supplement
Conclusion:
TIBS is not intended to substitute for specialist-provided preflight briefings
It is recommended for use as a preliminary briefing; and often will be valuable in helping you to make a "go or no go" decision
TIBS support within the contiguous U.S. was suspended on September 13, 2018
Note that TIBS does NOT satisfy the requirement to become familiar with all available information prior to a flight FAR 91.103
is available for purchase