3M C960, Service Information

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Model C960 Headset Intercom System
Operation and Diagrams
1-8
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3M 2000 May
changed, you must press the base station RESET
switch to program the new jumper setting into the
base station microprocessor.
n
Note
When jumper J5 is changed, you must also
reprogram the system headsets. Refer to the C960
Installation Instructions for more information.
Configuration Switches
RESET SWITCH: Very briefly, actuation of the
RESET SWITCH clears logic inputs of their
established levels and latches the logic inputs at their
new levels.
CHANNEL SELECT SWITCH: The C960 system is
capable of operating on eight different channels for
each of two lanes. This provides a total of 16
operating channels since each system may be
designated as a lane 1 or lane 2 system. Each
operating channel is comprised of a “set” of two
frequencies, one for receiving, one for transmitting.
The channel frequencies are preprogrammed in both
the base station and headset microprocessors. Each
actuation of the CHANNEL SELECT switch prompts
the base station microprocessor to advance to the next
available channel. After a new channel is selected,
you must reprogram all system headsets to the new
channel. (Headsets can operate only on lane 1 or lane
2 channels unless they are used with an accessory
cross-lane module.) For moreinformation onchannel
selection and reprogrammning, refer to the C960
Installation Instructions.