Valet System One Installation Instructions Manual page 10

Auxiliary Input Jack
Two different Input Jacks are available, each requiring different cabling.
Type 'A' ( For use with a system incorporating a master) (Special Order Only)
Run '2 core' shielded audio cable from the master to the Input Jack.
Type 'B' (For use with systems not incorporating a master)
Run 6 core cable (or same wire as used for intercom wiring) from
Input Jack to the nearest room station.
Auxiliary/Lock Outputs
An additional single core cable is required between all room stations
(and master if fitted).
Heavy duty 'Figure 8' cable (18 gauge or better) is to be run from
each relay output (via power source if applicable) to each auxiliary device.
Note: Clearly tagging all cables at the master or central wiring point is
recommended, as this can be extremely helpful in the event of having
to isolate a problem such as a damaged cable.
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Optional
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Optional
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