Tadiran Telecom T207S User Manual page 211

Wakeup
To cancel a Wakeup request:
Dial the entire procedure in a single block sequence.
1. Dial Wakeup feature code #173.
2. Dial cancellation code .
3. Press # or OK, depending on your phone settings, or wait for the phone to dial.
4. Listen for the confirmation tone.
5. Press SPKR to hang up.

Note: Wakeup request times must be cancelled one at a time.
If you have more than one wakeup request time programmed, then the closest wakeup time to the present
hour is cancelled. You must repeat this procedure to cancel each subsequent wakeup time.
Wakeup 199 T207S, T208S, T207S/NP and T208S/BL User Guide