docsRphyRpdIfPhysEntitySoftwareRev — CableLabs official current and historical MIBs
The vendor-specific software revision string for the physical entity. Note that if revision information is stored internally in a non-printable (e.g., binary) format, then the agent must convert such information to a printable format in an implementation-specific manner. If no specific software programs are associated with the physical component, or if this information is unknown to the agent, then this object will contain a zero-length string.