The number primarily refers to a technical specification for IP Multimedia Subsystem (IMS) emergency services used in telecommunications, or an academic research article regarding water quality monitoring . Telecommunications: ETSI TS 123 167
Details how emergency sessions are supported across different IP-Connectivity Access Networks.
The identifier also refers to a specific research article published in the journal (Article 123167), titled "Making waves: Report your quality assurance and control (QA/QC) ..." .