| 摘要 |
PCT No. PCT/FI93/00256 Sec. 371 Date Feb. 8, 1995 Sec. 102(e) Date Feb. 8, 1995 PCT Filed Jun. 11, 1993 PCT Pub. No. WO93/26101 PCT Pub. Date Dec. 23, 1993.For establishing a subscriber connection in a data transmission network and to a subscriber network, a subscriber connection is established by forming a first portion of a transmission connection on the subscriber side in an electrical form and a second portion of the connection on the exchange side in an optical form by means of an optical fibre. There are optoelectric converters at both ends of the second portion of the connection. In order to get rid of transmission devices of an active subscriber network, which devices are to be positioned in the field and are difficult to maintain, a signal transmitted by a transmission device of a subscriber is connected, without correcting the attenuation and distortion caused by the first portion, via one of the optoelectric converters, to said said portion correspondingly, a signal is transmitted from the exchange towards the subscriber, which signal is intended for the first portion and is at first connected via the other one of the optoelectric converters to the said portion. |
