| http://www.w3.org/ns/prov#value | - The present invention is embodied in and carried out by a telephone system including at least two telephone sets connected to a common C.O. line, in which the first or main phone includes a HOLD and HOLD release circuit for effecting release of the common C.O. line, after it has been seized and placed on HOLD, by either re-closing the hookswitch of the first or main phone, or by closing the hooksw
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