Depaepe 4 Serie Notice D'utilisation page 11

To use redial : after you have dialed a number, go off line for a moment, then
switch to "ON" to re- connect to the network. Confirm that you have a dial tone,
and then press the "BIS" key on the keypad.
The last number previously dialed will be redia- led from memory.
Redial is done in the same mode (Tone or Pulse) as originally dialed. If you
need to dial "9" or some other access number followed by a pause, sim- ply
press the "9" and wait for the next dial tone. Then press the "BIS" key to
redial the number in memory.
11