telephoner
/ˌtɛlɪˈfoʊnər, -ˈfoʊnər, -ˈfɒnər/Definitions
1. verb
to make a telephone call, especially repeatedly or habitually
“She telephoned her family every day to catch up.”
2. noun
a person who makes telephone calls, especially in a professional capacity
“The telephoner was handling customer service calls all day.”