| 摘要 |
PCT No. PCT/NL82/00011 Sec. 371 Date Jul. 22, 1982 Sec. 102(e) Date Jul. 22, 1982 PCT Filed Apr. 16, 1982 PCT Pub. No. WO82/03733 PCT Pub. Date Oct. 28, 1982.Electronically controlled subscriber telephone set which down-stream is protected by two PTC resistors and a VDR which are thermally coupled, is protected upstream of the hook contacts by a power limiting circuit which also acts as a line current interrupter by means of the transmission and dialing circuit. |
