Telephone line control system
AssigneeMagnetic Controls Company
InventorGuenter E. W. Hagedorn
Life of this patent
Estimating the term…
Abstract
Telephone line testing equipment in which a series of alternating current tone pulses are transmitted from the central office along the lines to a sensing means placed at a remote point in the circuit. The sensing means receives the coded tone pulse sequence, decodes it to determine if the address is correct, and if so, what information is present, and then either connects or disconnects the remote equipment from the line or, in the alternative, connects suitable loopback testing circuits to the line.
Claims8
Apparatus for the testing of a communication circuit from one point to another remote point comprising in combination;
- means for applying a binary coded series of pulses to the circuit, said coded series including an address code which always begins with one initial pulse;
- sensing means in the circuit at the remote point for sensing said coded series of pulses;
- comparing means connected to said sensing means for receiving said series of pulses and comparing the address code therein as it is received with a stored address code which is automatically generated at the remote point to determine if the proper address code has been received;
- stored address code generating means connected to said comparing means to provide said address code in response to said initial pulse;
- first switching means connected to said comparing means operable upon the reception of the proper address code to connect a loopback circuit to said communication circuit in response to the reception of the proper loopback instruction in the coded series of pulses;
- and
- second switching means connected to said comparing means operable upon the reception of the correct address code to control an isolation switch in response to the reception of the appropriate instruction in the coded series of pulses.
Dependencies are inferred from the claim text.