发明名称 |
Optical repeater for fault tracing in an optical transmission system |
摘要 |
The present invention relates to optical repeaters in a two-way optical line link, e.g. one included in a teletransmission system. The optical repeaters are implemented such as to provide a system which, inter alia in fault localizing, utilizes the line link transmission capacity optimally by completely optical through-connection of signals on the optical fibre cables. In fault localizing, one repeater at a time is checked, by an end terminal in the link transmitting a test signal including an address for selecting a repeater for testing and a test pattern. An optical amplifier amplifies the test signal in every repeater through which the signal passes, and when it reaches the repeater indicated by the address, a control circuit controls an optical switch such that the test signal is switched (loop connected) and is returned to the transmitting terminal where fault analysis takes place.
|
申请公布号 |
US4887309(A) |
申请公布日期 |
1989.12.12 |
申请号 |
US19880205689 |
申请日期 |
1988.06.13 |
申请人 |
TELEFONAKTIEBOLAGET L M ERICSSON |
发明人 |
ANDERSSON, OVE B.;BERG, JOHAN;GRANESTRAND, PER O.;VATSEL, ARMAND |
分类号 |
H04B10/00;H04B10/02;H04B10/08;H04B10/16;H04B10/17;H04B17/02 |
主分类号 |
H04B10/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|