Panasonic KX-T7730 Corded Phone "prefix start tri" Questions

start with a + sign. I don't know how to do this on my phone. You don't actually need to dial a plus. The plus notation is often used to write out international numbers, and some telephones do

...the receiver on the desk set. 4. Enter phone number chosen,including area codes and long distance prefixes if needed! 5. Locate the speed dial position button you want for that number...(located ...