The TR-1 is a cost effective, user programmable Toll Restrictor, ideal for applications where unauthorized phone calls cannot be tolerated.Concealed in a standard wall mount RJ11C jack, the TR-1 is designed to allow or restrict local and/or specied long distance numbers. The TR-1 provides a 40-Number allow/restrict table, a 6-Digit bypass code (allows authorized users unrestricted access), and an inbound/outbound call timer with disconnect.