The ornamental design for a cablesuspensionsystem, as shown and described.
FIG. 1 is an enlarged bottom perspective view of the new design for a cable suspension system shown in FIG. 7;
FIG. 2 is an enlarged front elevation view thereof;
FIG. 3 is an enlarged back elevation view thereof;
FIG. 4 is an enlarged right elevation view thereof;
FIG. 5 is an enlarged top plan view thereof;
FIG. 6 is an enlarged bottom plan view thereof; and,
FIG. 7 is a top perspective view of the cable suspension system.
The broken lines included herein are for purposes of showing the environment in which the claimed design is used and form no part of the claimed design.