| 摘要 |
PURPOSE:To prevent the malfunction for the automatic telephone exchange by monitoring the input registering closure via the resignation monitor relay and then giving the connection between the multi-frequency signal receivers via the contact. CONSTITUTION:In case input registering IRL provided between input trunk ICT and input register IR is closed, resignation monitor relay MA operates on the battery and via relay D. Thus the circuit comprising contacts ma and R is released, and a connection is secured between IR and multi-frequency signal receiver CDR. As a result, the 1st figure of called subscriber B, which is transmitted through the route of Leads A1 and B1 within ICT, capacity C and B relay contact B, etc. to leads A and B of CDR, is received and then converted into the DC signal to be stored in relays R0-R11 within IR. In such constitution, no switching noise caused at the closure time of the input registering is piled onto the 1st figure, thus preventing the malfunction. |
