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ARRANGEMENT FOR GENERATING ARBITRARY SIGNAL AND/OR OPERATING CONTROL SIGNAL, AND INDICATING SECRET TRANSMISSION AND/OR BUSY CONDITION AND/OR PROVIDING AGRESSIVE JOINING AT A TELEPHONE SYSTEM, ADVANTEGOUSLY FOR PARTY-LINE SYSTEMS
ARRANGEMENT FOR GENERATING ARBITRARY SIGNAL AND/OR OPERATING CONTROL SIGNAL, AND INDICATING SECRET TRANSMISSION AND/OR BUSY CONDITION AND/OR PROVIDING AGRESSIVE JOINING AT A TELEPHONE SYSTEM, ADVANTEGOUSLY FOR PARTY-LINE SYSTEMS
