Introduction Intent The intent of this test is to determine the effects on the optical and mechanical characteristics of fiber optic components resulting from exposure to an elevated temperature for a specific length of time.1 The procedure is applicable to all types of fiber optic devices including connectors, splices, passive branching devices (couplers), etc. Failure Modes Potential failure modes for this test include, but are not limited to: a. Loss of optical continuity, either during or at the end of the test, b. Fiber breakage or damage, c. Breakage of other components, d. Loss of component integrity, e. Degradation of optical transmission and/or reflection characteristics.