How far apart can optical amplifiers be spaced if they can amplify a signal 25 dB, and the cable looses 0.25 dB every kilometer?
which byte supplied by the ADM at Site B in both directions in the section overhead is used for transporting SSM messages?
How far apart can optical amplifiers be spaced if they can amplify a signal.25 dB, and the cable looses 0.25 dB every kilometer?
Which form of SONET switching requires the exchange of the K1 and K2 bytes between adjacent multiplexer and/or cross-connect locations for switching to occur properly?