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Yes, the word 'telephoned' is the past tense of the verb to telephone (telephones, telephoning, telephoned).
example: I telephoned the doctor's office to cancel my appointment.
telephoned
The cast of While Father Telephoned - 1913 includes: Ruth Roland as Ethel Marlin - the Daughter
The present participle is telephoning.
The past participle is telephoned.
President Richard Nixon