ATM EXCHANGING DEVICE

摘要

PROBLEM TO BE SOLVED: To simplify and compact mounting by separately and annularly arranging parts for processing electric signals and optical signals and placing the common control part of a power source part or the like at the center of annular arrangement further. SOLUTION: The three pieces of switch units U1-U3 are attained by constituting the ATM switch boards 1-1-1-8 of an electric signal level provided with optical signal input/output terminals 12 and 13 in a plate shape and vertically piling them up in 8 stages and they are connected and arranged through optical connection parts O1-O2. Also, a power supply current from a power source unit 7 at the lower part of the switch units U1-U3 to the respective boards 1-1-1-8 is supplied through a power source circuit 8 provided on the center of the annularly arranged switch units U1-U3. A connection optical fiber length is shortened by disposing the optical connection parts O1 and O2 on the boundary back surface of the switch units U1 and U2 and the boards 1-1-1-8 are electrically connected by a back board 10 provided with optic/electric and electric/optic transducers. In such a manner, the parts for handling the electric signals and optical signals are separated and an optical signal transmission line is shortened.