Optical communication module, method for recording log of optical communication module, and optical communication apparatus

Abstract

An optical communication module includes a control unit, a nonvolatile memory and a volatile memory. The control unit monitors the optical communication module and repeatedly receives log information about a state of a host substrate from the host substrate. The control unit stores the log information in the volatile memory, together with a result of monitoring of the optical communication module. When a hazard signal indicating an abnormality relating to power supply from the host substrate is detected, the control unit writes, in the nonvolatile memory, the result of monitoring of the optical communication module and the log information from the host substrate.

1 . An optical communication module insertable in and removable from a host substrate, comprising:
 a control unit for monitoring said optical communication module and repeatedly receiving log information about a state of said host substrate from said host substrate; and   a nonvolatile memory, wherein   when a hazard signal indicating an abnormality of said host substrate is detected, said control unit writes, in said nonvolatile memory, a result of monitoring of said optical communication module and said log information from said host substrate.   
     
     
         2 . The optical communication module according to  claim 1 , further comprising
 a power supply monitoring unit, wherein   said power supply monitoring unit outputs said hazard signal when an abnormality relating to power supply from said host substrate to said optical communication module is detected, and   said abnormality relating to said power supply includes a case in which a power supply voltage supplied from said host substrate during operation of said optical communication module falls outside a prescribed range.   
     
     
         3 - 4 . (canceled) 
     
     
         5 . A method for recording a log of an optical communication module, comprising the steps of:
 causing an optical communication module insertable in and removable from a host substrate to perform self-monitoring;   causing said optical communication module to receive log information about a state of said host substrate from said host substrate; and   writing, in a nonvolatile memory mounted on said optical communication module, a result of said self-monitoring by said optical communication module and said log information received by said optical communication module, when an abnormality relating to power supply from said host substrate to said optical communication module is detected.   
     
     
         6 . An optical communication apparatus, comprising:
 a host substrate; and   a plurality of optical communication modules, each of which is insertable in and removable from said host substrate and includes a nonvolatile memory, wherein   each of said plurality of optical communication modules performs self-monitoring and repeatedly receives log information about a state of said host substrate from said host substrate,   when an abnormality relating to power supply from said host substrate to said optical communication modules occurs, each of said plurality of optical communication modules writes, in said nonvolatile memory, a result of said self-monitoring and said log information from said host substrate, and   said host substrate transmits the log information to said plurality of optical communication modules at different timings.   
     
     
         7 . (canceled) 
     
     
         8 . The optical communication module according to  claim 1 , wherein said log information includes information indicating whether a fan for releasing heat generated at said host substrate is normal or not. 
     
     
         9 . The optical communication module according to  claim 1 , wherein said log information includes time information indicating a time when said log information is generated. 
     
     
         10 . The optical communication module according to  claim 1 , wherein said log information includes time information indicating a time when said host substrate is monitored. 
     
     
         11 . The method for recording a log of an optical communication module according to  claim 5 , wherein
 said log information includes information indicating Whether a fan for releasing heat generated at said host substrate is normal or not.   
     
     
         12 . The method for recording a log of an optical communication module according to  claim 5 , wherein
 said log information includes time information indicating a time when said log information is generated.   
     
     
         13 . The method for recording a log of an optical communication module according to  claim 5 , wherein
 said log information includes time information indicating a time when said host substrate is monitored.   
     
     
         14 . The optical communication apparatus according to  claim 6 , wherein
 said log information includes information indicating whether a fan for releasing heat generated at said host substrate is normal or not.   
     
     
         15 . The optical communication apparatus according to  claim 6 , wherein said log information includes time information indicating a time when said log information is generated. 
     
     
         16 . The optical communication apparatus according to  claim 6 , wherein
 said log information includes time information indicating a time when said host substrate is monitored.