Telex RADIOCOM BTR-300B Operating Instructions Manual page 21

High/ Low Switch: Along with set ting the DIP
switch in side the unit to cor re spond to the
wired in ter com you have se lected to use, you
must also set the "High/Low" switch. This
switch is also lo cated in side the BTR-300 as
shown in Fig ure 16.
For the cor rect set ting cor re spond ing to your
wired in ter com unit see Ta ble 2. The switch is
fac tory set for use with Telex AudioCom or
RTS wired in ter coms.
Fig ure 16
Lo ca tion of High/Low Switch
-17-
Switch
Set ting
Telex
High
AudioCom
RTS High
Clearcom Low
Ta ble 2