Call metering system for coin-operated telephone - credits newly inserted coins only after time period associated with previously inserted coin has completely elapsed

摘要

The call metering system, for a coin-operated telephone, allows coins to be inserted during the conversation by means of metering pulses transmitted from the exchange in a sequence determined by the value of the coins to be inserted. - When a metering pulse arrives for erasing a coin-inertion process for existing coins, the coins are credited after the time period associated with this metering pulse has completely elapsed. There is also an indication given when the coins to be credited exceed a certain amount.