The communications between an ITS Management Center or portable computer and a Closed Circuit Television (CCTV) Switch is accomplished by using the NTCIP Application Layer services to convey requests to access or modify values of CCTV Switch objects resident in the device via an NTCIP network. An NTCIP message consists of a specific Application Layer service and a set of data objects. An NTCIP message may be conveyed using any NTCIP defined class of service that has been specified to be compatible with the Simple Transportation Management Framework (STMF).

The scope of this document is limited to the functionality related to CCTV switches within a transportation environment. This publication defines data elements that are specific to CCTV Switches and also defines standardized data element Groups that can be used for conformance statements. The limits and descriptions of the parameters are established to give the user maximum flexibility to operate devices that either exist at the time this document was authored or may exist in the future.

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