发明名称 TESTANORDNING FOR TELELEDNINGAR
摘要 A system for electronically selecting and establishing test loop circuits between a remote test position and any of a large number of communication lines at an access location. Extensive logic circuits at the access end and the test end exchange information and display for the operator if the circuit is ready, if there has been a transmission error or component failure, if the circuits are busy, and other factors that affect the system thereby making the operator's task easier. Fail safe circuits prevent opening of telephone lines by access circuitry malfunctions.
申请公布号 SE7700812(A) 申请公布日期 1977.10.01
申请号 SE19770000812 申请日期 1977.01.26
申请人 * MAGNETIC CONTROLS COMPANY 发明人 R A * GUNDERSON
分类号 H04B3/46;H04M3/26;H04M3/28;(IPC1-7):H04M3/22 主分类号 H04B3/46
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