Telephone station apparatus with selective restricting of local calls

摘要: Station apparatus is provided for exclusively handling calls without the use of coins including credit cards calls, collect third party charge in WATS (800 numbers), emergency directory assistance etc. The station especially useful to provide service when interconnected with central office equipment that does not have provisions automatically blocking local i.e. call exclusion features such as found electronic exchanges. prohibits by opening loop if more than a predetermined number digits are dialed unless first digit "0" or "1". Thus, dialing numbers 911, 411, 611, 1911, 0, 0+ permitted while prevented.