Do you have a question about the Alcatel 2315 and is the answer not in the manual?
Enter programming mode by taking handset off hook while pressing R (flash) for 2 seconds.
Configure service buttons or message key codes by pressing HOLD, selecting button, dialing number, and pressing HOLD.
Erase service buttons or message key codes by pressing HOLD, selecting button, and pressing HOLD again.
Set flash timing to 100 ms, 300 ms, or 600 ms by pressing HOLD, FLASH, then a digit.
Select melody pitch 1 or 2 by pressing HOLD, RD, then 1 or 2, followed by HOLD.