MS-702 TWO-CHANNEL MAIN STATION
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Figure 1-1: Front Panel
1. Talk Buttons: Each channel has an illuminated talk button for activating the
microphone feed to that channel. Each talk button has a dual action
(momentary or latching feature) depending on how the button is pressed. If
desired, the latching function for each channel can be defeated using the
option switches on the rear panel. The following describes the various
functions of these multi-purpose buttons:
• MOMENTARY: Press and hold the talk button while you are speaking.
Release it when you are finished.
• LATCHING: Press the talk button quickly to latch the talk function.
Press the button again to turn off the talk function.
• TALK INDICATION: The talk button will illuminate yellow whenever
the talk function is activated. The talk button illuminates blue whenever
the station is receiving power, but the talk function is off.
• CALL INDICATION: The call button will flash red 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 activates
program interrupts or any other call-activated function available on
other stations. Option switches on the rear panel 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 button and gently twist. This will remove the cap.
3. Remove the square white diffuser from the cap.
4. Insert a 1/2 in. (1.27 cm) x 1/2 in. (1.27 cm) 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 call button
will flash while the call button is pressed, indicating the presence of a call
signal on the line.
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2-Channel
Main Station
MS-702