To provide a method for erasing and posting in a portable memory for speech terminal by which posting.deletion of recorded information between two new and old portable memories can be conducted optionally at a desired point of time and to provide a recording medium that records its program.
Independently of subtraction processing of charging information that is gradually entered from charge information recorded on an old card set in a public telephone set, other telephone directly than that of the charge information is erased via an erasure start step I, a posting execution selection step II, an erasure execution step III or an erasure old card read step IV, an old new card replacement step V, a new card write step VI, a new old card replacement step VII and an erasure end step IIX through an operation of a public telephone set.
SAITO RYUICHI
SAGARA KAZUHIKO
NAKAJIMA TAKANORI
Next Patent: TELEPHONE CARD AND TELEPHONE SYSTEM USING THE TELEPHONE CARD