Charles John Funk - Columbus OH George Minchenko - Reynoldsburg OH
Assignee:
Bell Telephone Laboratories, Incorporated - Murray Hill NJ
International Classification:
H04M 324
US Classification:
1791752R
Abstract:
A network path test circuit for testing call connections established through the switch network of a telephone toll switching office. Common control equipment of the telephone toll switching office momentarily applies a tone signal to the transmit and receive paths of a call connection prior to outpulsing a called telephone station directory number. Detector apparatus measures the impedance reflected back over the call connection to determine the absence and existence of path transpositions in the call connection. The common control equipment is enabled to establish another call connection when the reflected impedance indicates path transpositions in the call connection.
Lowell Grade School Boise ID 1948-1948, Franklin Elementary School Boise ID 1948-1949, Jefferson Elementary School Boise ID 1949-1955, South Junior High School Boise ID 1955-1958, Fruita High School Fruita CO 1956-1959