NEC SL1100 User Manual page 9

Do Not Disturb Function
The N.E.C key sets have a function so that anyone trying to ring the key
set receives a BUSY tone or routes to voicemail even if it is not being
used. This function is useful if a room is needed for an important meeting
and the keyset needs to be available for outgoing calls but needs to be
silent so as not to disrupt the meeting.
Pressing the DND key then choosing one of the following options does
this:
1 - External calls only
2 - Intercom calls only
3 – All calls
0 - Cancel
Last Number Redial
The N.E.C SL can store up to 10 numbers. The system will keep track of
the last external or internal number dialed by each extension and allow
them to redial it regardless of how long the extension has been idle.
Redial the last number by pressing the LND key on the jog dial then scroll
up or down to find the number you want. Simply lift the handset to dial.
Call Pickup
It is possible to pick up a call that is ringing at another extension by using
a Call Pickup codes, function keys or the soft keys. There are three
different codes that can be used, depending on the circumstances. These
codes will allow you to pick up calls that are ringing a groups or calls that
are ringing at specific extension.
The following codes can be used: