Telematrix SP-300 Spectrum PLUS User Manual page 32

Using the Hold Feature
The "HOLD" key is used to place a caller
on hold. To use, simply press the "HOLD"
key. The LED above the HOLD key will
illuminate to indicate that the line is on
hold.
When the "HOLD" key is active, the
handset can be lifted off-hook or returned to
its on-hook position and the line will not be
disconnected. To return to the caller, simply
lift the handset
Hold will also release when the call is
picked up from an additional extension
phone.
If the headset is active prior to placing the
caller on hold, press the "HEADSET ON/
OFF" feature will re-activate.
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