RE-RESPONSE SYSTEM FOR HOLDING CIRCUIT

PURPOSE:To decide a holding main wire by starting again the calling with the main wire by dialing the extension number whose specific number holding for the re-response is operated in an extension telephone set which is responded again to the holding main wire to collate the number and the condition information which is already stored in a controller. CONSTITUTION:Extension circuits 41-43 are connected to plural extension telephone sets 51-53 respectively, a controller 10 is connected to the respective circuits 41-43, and the second cross point circuit 7 is also connected between the circuits 41-43, and the device 10. Main wire circuits 21 and 22 are provided in correspondence to plural main wires 11 and 12, and a main wire incoming signal receivng circuit 23, a control circuit 24 which controls a loop circuit, etc., are provided in the circuits 21 and 22. A holding-sound transmission control circuit 3 is connected between the circuits 21 and 22, and the device 10, and the first cross point circuit 6 is connected between the circuits 21 and 22, and respective circuits 41-43. A holding main wire is decided by collating the extension number which is holding-operated by the telephone sets 51-53 and the condition signal which is already stored, and the calling with a main wire 1 starts again.