Clear-Com MS-232, User Manual

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LATCHING: Press the button quickly to latch the Talk function. Press the button again to
turn off the Talk function.
TALK INDICATION: The Talk button will illuminate dimly whenever the Talk function is
activated.
CALL INDICATION: The Talk button will flash brightly when a Call signal is received on
that channel.
CALL ON TALK: Each channel can optionally be set to send a Call signal whenever you
press the Talk button. This function is used to activate program interrupts or any other
Call-activated function available on other stations. Option switches on the rear panel will
enable this function.
SPEAKER MUTE: If the front panel speaker is turned on, pressing either Talk button will
reduce the speaker output level to avoid feedback.
The Talk buttons can be labeled to indicate their function. To label the Talk buttons, use the
following procedure:
1 Pull the Talk button straight off.
2 Insert a small flat blade screwdriver into the slot between the cap and the body of the but-
ton and gently twist. This will remove the cap.
3 Remove the square white diffuser from the cap.
4 Insert a 1/2" X 1/2" square of thin paper with the needed description into the cap. Follow it
up with the square white diffuser and press the cap onto the body of the button. Press the
button back into the front panel.
2 Call Buttons: Each channel has its own Call button. Pressing a Call button will send a Call
signal on that channel. All the call lights on that channel will flash. Call signals can also be
sent while talking if required. The Talk button will flash while the Call button is pressed, indi-
cating the presence of a Call signal on the line.
3 Tone Alert: An audible tone alert can be enabled to sound when a Call signal is received on
either channel. This can be useful when the operator's attention has been drawn away from
the MS-232 indicator panel. Press the Tone Alert button to alternately enable or disable the
audible tone alert. The green indicator next to this button is lit when the audible Tone Alert is
enabled. When enabled, the Tone Alert will sound when a Call button on a beltpack or station
is pressed. The Tone Alert will not sound if a Call signal is originated at the MS-232 station.
The level can be adjusted by the control on the rear panel (4).
5 Listen Level Controls: Each channel has a separate Listen level control. Turn these con-
trols to set the listen level you need on each channel. Turn the control completely counter-
clockwise to silence a channel.
6 Sidetone Controls: Each channel has a Sidetone Null control. Sidetone is the level of your
own voice that you hear while talking on the intercom. Setting a comfortable level of sidetone
will ensure that the intercom line sounds alive and also helps you modulate your voice relative
to other voices on the line.
Typically, different Sidetone Null settings are needed depending upon whether you are using
the gooseneck panel microphone along with the speaker or not. Use one the following proce-
dures to correctly set the Sidetone level controls.
Sidetone Adjustment Procedure for Gooseneck Microphone with Speaker turned on:
1 Turn off the Party Line Link (A+B) switch.
2 Turn the Level control for Channel B all the way down. Set the Level control for Channel
A to a comfortable level.
Clear-Com MS-232 Two-Channel Main Station
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