Avaya Integral 3 / 5 FC1 User Manual page 122

Appendix
Setting
Disable access to central phonebook
If you want to store a key combination in the telephone book, press button 1
for an extended period instead of S
122
Key code sequence
OK 1 PIN Code
(long) 9 7 3 OK
HASH
.
ELECTOR
FC1 / FC1 Ex