Direct access test unit for central office

Abstract From the Canadian patent

A direct access test unit for enabling a craftsperson at a telephone facility remote with respect to a central office to test subscriber lines comprises a first access port coupled to an access line circuit, by way of which the remote telephone facility communicates with the telephone office in the course of testing subscriber lines, and a second access port coupled to a test trunk circuit by way of which a subscriber line is to be tested by the the test unit. Coupled between the first and second access ports is a processor-controlled subscriber line test/interface arrangement which is responsive to (tone) dial signals, generated by the remote telephone facility and, representative of a …