Device and method for regeneration of optical signals as well as optical communication network

Means (10a) for regenerating optical signals with one or more devices (1a, 1b, 1c), each one of the several different from the device (10a) received optical signals (DB3, DB4, DC1, DC2, DC3, DC4) can regenerate, and the means (12) for determining the quality of the received optical signals (DB3, DB4, DC1, DC2, DC3, DC4), characterized in that the signal regeneration means (1a, 1b, 1c) only a predetermined number (DC1, DB4) of those signals regenerate, for the quality determining means (12) the worst signal quality has been determined.