MS-702 TWO-CHANNEL MAIN STATION
1-8
normal operation. The default position of the switches is in the off (up)
position. The function of each switch is as follows:
1. MOM TALK A: Setting the momentary talk A switch to the on position
will disable the latching function of the channel A talk button. In this
mode, the talk button must always be held in continuously while the
operator is talking on channel A.
2. MOM TALK B: Setting the momentary talk B switch to the on position
will disable the latching function of the channel B talk button. In this
mode, the talk button must always be held in continuously while the
operator is talking on channel B.
3. CALL ON TALK A: If the call on talk A switch is set to the on position,
a call signal will be placed on channel A whenever the talk function is
activated. This can be used to activate any call-activated functions
available on other stations.
4. CALL ON TALK B: If the call on talk B switch is set to the on position,
a call signal will be placed on channel B whenever the talk function is
activated. This can be used to activate any call-activated functions
available on other stations.
5. INTRPT ANNC: If the interrupt announce switch is set to the on
position, pressing the announce button will disconnect the microphone
from the intercom line(s). This will allow announcements to be made
without being heard over the intercom channels.
6. INTRPT EXT IFB: When the hot mic output is connected to
Clear-Com’s IFB system and the interrupt external IFB switch is set to
the on position, pressing a key on the IFB system will disconnect the
selected headset or panel microphone from the intercom line(s). This
allows the MS-702 microphone to be used to cue talent without
affecting intercom line communication.
7. LONG LINE A: If a long cable run on channel A is unavoidable and
approaches 1,000 ft. (305 m) or more, set the long line A option switch to
the on position. The ability to set a sidetone null on channel A depends
upon properly setting this switch.
8. LONG LINE B: If a long cable run on channel B is unavoidable and
approaches 1,000 ft. (305 m) or more, set the long line B option switch to
the on position. The ability to set a sidetone null on channel B depends
upon properly setting this switch.
16. Termination Switches: These switches provide switchable terminations for
channels A and B. In most systems, both terminations on the MS-702
should be in the on position (default setting). The fundamental concept of
the Clear-Com party-line intercom is that all channels are terminated in one
location, preferably at a main station or power supply. The termination
switches on the MS-702 rear panel should be set to the off position only if
the channel is terminated by another main station or power supply in the
system. If there are no other main stations, power supplies, or other
terminations on the line, set the rear panel switches labeled term A and
term B to the on position.
Note: All intercom lines must be terminated only once, whether they are
used or not. Never “double-terminate” a line.
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