| http://www.w3.org/ns/prov#value | - While the call status store of the control unit contains adequate memory to control the state of the few supervisory lamps at a few attendant consoles (see particularly FIG. 13 of the above-mentioned Gebhardt et al. application), the amount of extra memory that would be necessary to control supervisory lamps Patented Jan. 7, 1969 at a plurality of key telephone stations is quite another matter.
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