Samsung DS-5012L - Manual (Page 85)

Making Calls DS/ITP-5012L Phone User Guide
72
4. Other Call Functions
The following functions are available for making both intercom and outside
call.
Last Number Redial
Press and hold the [Send] button while in standby
mode.
The phone redials the last telephone number
that you dialled.
You can make a call through the speakerphone
or handset. You can switch from the speaker to the
handset simply by lifting the handset.