Samsung NX-308 - Manual (Page 157)

Start to record through handset or speaker phone.
After recording, you can hear automatically the recorded message.
NOTE
In case of first Power on, record phrase 1 to phrase 4 in sequence.
3.3 Monitoring
Dial '18' and the customer passcode Display: 'RECORD:PLAY ?'.
Select phrase number (5~8) to play back; Display: 'PLAYING'.
You will hear the selected message.
NOTE
In order to change a recorded message, record a new message following
precedure (1), so the message will be updated.
If you perform the monitoring procedure (2) when no message is recorded,
you may hear an error tone.
You cannot record a message while a message is being played back.
If you stop during recording, you can neither record a new message, nor
monitor a recorded message, until the predetermined record time elapses.
The above description specifies '18' to be dialed for recording. This number
may have been changed by data setting. Confirm the number with the installer.
NX-SERIES HYBRID KEY SYSTEM APPENDIX C DISA VOICE ANOUNCEMENT
5 - 10