Telematrix 3300TRM - Manual (Page 14)

SWITCH SETTING
Message Waiting Switch
There are two (2) slide switches located on the base unit
under a plastic cover. Use a sharp pointer to remove the
switch plastic cover plate to expose the two switches.
These switches control how the message-waiting lamp
(MWL) works:
Position:
Mode:
TYPE Responds to “high-voltage”(neon type) MWL
signaling, and also to "low-voltage" (LED type)
MWL signaling
LR1 Reverse polarity MWL, polarity 1
LR2 Reverse polarity MWL, polarity 2
The second switch (On/Off) enables the MWL when
switched on, but completely disconnects the MWL circuit
when switched off.
The default Message Waiting switch settings should be:
 Message Waiting ON/OFF switch needs to be set to “ON”.
 Message Waiting TYPE/LR1/LR2 switch needs to be set
to “TYPE”.
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