Optical connecting system for connecting a first and a second optical device, the optical connecting system comprising (a) a first and a second multi-fiber device connector (108, 110) comprised in the first and second optical device (102, 104), respectively, and (b) a multi-fiber optical connection cable comprising a plurality of optical fibers and having a first and a second multi-fiber cable connector (112, 114) at a respective first and second end thereof and being adapted to be connected to the first and second multi-fiber device connector (108, 110), (c) wherein the first and second optical devices (102, 104) are configured to transmit to and/or receive from the respective other optical device (102, 104) one or more wanted optical data signals via selected optical fibers of the multi-fiber optical connection cable, characterized in (d) that the first optical device is configured to supply a first optical connection signal (S c) to a transmit control port of the first multi-fiber device connector and (e) that the second optical device is configured to receive the first optical connection signal (S c) that is transmitted through a respective optical fiber of the multi-fiber optical connection cable to a receive control port of the second multi-fiber device connector, (f) wherein no wanted optical data signal is transmitted over the optical path that guides the first optical connection signal (S c), and (g) that the second optical device is configured to detect whether the first optical connection signal (S c) received matches one or more predetermined criteria, wherein the second optical device is configured to assume a correct connection to the first optical device via the multi-fiber optical connection cable if the one or more predetermined criteria are matched. (a) a first and a second multi-fiber device connector (108, 110) comprised in the first and second optical device (102, 104), respectively, and (b) a multi-fiber optical connection cable comprising a plurality of optical fibers and having a first and a second multi-fiber cable connector (112, 114) at a respective first and second end thereof and being adapted to be connected to the first and second multi-fiber device connector (108, 110), (c) wherein the first and second optical devices (102, 104) are configured to transmit to and/or receive from the respective other optical device (102, 104) one or more wanted optical data signals via selected optical fibers of the multi-fiber optical connection cable, characterized in (d) that the first optical device is configured to supply a first optical connection signal (S c) to a transmit control port of the first multi-fiber device connector and (e) that the second optical device is configured to receive the first optical connection signal (S c) that is transmitted through a respective optical fiber of the multi-fiber optical connection cable to a receive control port of the second multi-fiber device connector, (f) wherein no wanted optical data signal is transmitted over the optical path that guides the first optical connection signal (S c), and (g) that the second optical device is configured to detect whether the first optical connection signal (S c) received matches one or more predetermined criteria, wherein the second optical device is configured to assume a correct connection to the first optical device via the multi-fiber optical connection cable if the one or more predetermined criteria are matched.