Various shapes of cable can br employed to provide con-nection between the two nodes such as rectangular circle/ring triangular elliptical and random shapes Topology optimization of undersea cables has been syudied by where various ca-ble shapes are considered including rhombus rectangular and a rectabgle with round corners Work on optimizing the path of laying a single cable between two end-points appear in In the authors prresent a survey on existing research publications related to disaster survivability in optical networks where they classify disasters according to the following three categories predictable non-predictable and inteworks Disas-ter modeling approaches can be divided into deterministic and probabilistic models A deterministic model assumes that network equipment fails with probability it it is located within a disaster zone and it fails with proability otherwise In con-trast in probabilistic model a network equipment fails with a certain probability depending on factors such as its distance fron of fiber cable and specifications (e.g.,the strength and reliability of the material the level of shielding ) Relative to the deterministic model probabilistic model introduces a certain level complexity However it improves accuracy by considering a range of relistic factors when evaluating the response of the cable to the natural disasters Therefore in this paper we adopt a probabilisyic approach