How the emergency cable laying

1) the emergency cable laying conditions

When a direction of the fiber-optic cables all the blocks, or in all major tune-pass circuit, you can consider a one-time repair the cable, do not rush through the use of the emergency circuit. In the absence of conditions for the temporary transfer through the circuit, or a temporary transfer through part of the circuit can not meet the communication needs of large-capacity case, the emergency should be laying fiber optic cable, according to "circuit scheduling system" under the scheduling order of scheduling principles and rob pass circuit, temporary communication is restored and then re-laying new fiber optic cable routing options, a formal repair.

2) the scope of the emergency cable laying fiber optic cable to determine the impact of natural disasters or external obstacle blocking occurs, generally sticking point in the determination of the general location, based on the road easier to find a strange barrier point, you can determine the scope of the emergency cable laying. However, with OTDR station or relay station in the endpoint measured only sticking point, which is in between the two joints, but can not determine the specific location of obstacles, it is difficult to determine the scope of the emergency cable laying. At this time, if conditions in the remote relay station into the testing with OTDR, the comprehensive analysis of test results on both sides, and can accurately determine the cable break, if no condition tested with OTDR from two directions, respectively, may be made under the two case processing:

a) barriers to a point closer to a connector, the emergency cable connectors to be started from this deployment, it opens the joints, joints with OTDR to the obstacles in the direction of the test, then test the distance is short, a more accurate measure of disorder specific location, you can determine where to place the emergency until the fiber cloth.

b) sticking point in the center position than two joints, not by a joint emergency response at the beginning of laying fiber optic cable, it is necessary to further determine the location of the point obstacles, the obstacles to a point on both sides of the emergency cable laying. In such cases, heuristics can be gradually extended to find the specific location of obstacles, namely: in the end station or relay station initially measured with OTDR barrier point, barrier point in front of dug cable, fiber cut off a retest, such as barriers in the cut off point is not that the scope of class, you should determine roughly how far the poor, then further dug in front of cable, fiber cut off another retest once again, until the point of Na Ruqie break barriers within the cable can be sure that emergency The laying range. Can be concluded that the general barriers to retest two points of the specific location.

c) accelerate the same model cable connector emergency repair
Another cable emergency repair method, which uses the same type of fiber optic cable barrier as an emergency repair cable, use connectors (union) plus matching liquid temporary continuation to reopen the circuit.