Tadiran Telecom FlexSet 280 User Manual page 161

Display Message Key LED
If many keys need to be programmed, as in the case of a FlexSet 40B, you may
program one of the programmable keys with the code #139 for Program in
order to alleviate the need to enter the code each time you program a key.
To program an automatic key:
1. Dial Programming feature code #139.
2. Press selected key to be programmed.
3. Redial Programming feature code #139.
4. Repress selected key.
[SPKR]
5. Press or press and release the hookswitch.
Tip: Once you have programmed all your keys, you can reporgram the PROG
key for another feature.
Programming: Programmable Keys 136 FlexSet 120/280 User Guide