ETOPS communication question

Date:         09 Dec 97 03:54:22 
From:         SHIH-HSUAN_WANG@email.china-airlines.com
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ETOPS regulation (AC 120-42A) requires the aircraft to have "reliable
two-way voice communications between the airplane and the appropriate air
traffic control unit".

Is HF phone patch "reliable" enough for ETOPS operation?  Do anyone know
what airlines are currently using HF phone patch for their ETOPS flights?

-Suzanne