GE 19317 User Manual page 22

Flash
Press the flash button to activate customer calling services
such as call waiting or call transfer, which are provided by
your local phone company.
Redial
You may redial the last number you called by pressing the
redial button after you get a dial tone.
NOTE: The Redial feature holds in memory the
last phone number you dialed (as many as
32 digits). If you pressed any numbers after
dialing the phone number, (for example, when
accessing a voice-menu system) those numbers
also are redialed.