Siemens 300Series User Manual page 53

To put a call on
private hold
To connect to the
call again
Press the Private Hold (HOLDPVT) key. If
you have a Privacy key, its status light
turns on.
OR
Press the Privacy key, or press TRANSFR
and dial # 2. The Privacy status light turns
on.
Press the Hold key.
The status light flashes next to the line key
that you have put on hold.
Press the line key next to the flashing status
light, or lift the handset and press the line
key.
Using Your Phone 2-17