NFS-640: DVC Digital Voice Command

Each DVC Series model is a multi-featured audio processor with digital audio functionality that operates as an event-driven audio message generator and router. It is designed for use with the DAA2, DAX, DAA Series digital audio amplifiers, and the DVC-RPU Remote Paging Unit, as well as the DS-DB distribution boards, in a single panel or networked environment, and may also be used as an analog audio source or configured as a remote paging unit.

The NFS2-640/E may be directly connected to the DVC for single panel applications. An associated NCA-2 is required when a DAL (digital audio loop) is part of the configuration; this configuration supports NUP-to-NUP-to-NUP configuration for single panel DAL applications.

Network configurations require an associated NCA-2, and will support all Network Control-by- Event; each node (DVC, CPU-2 and NCA-2) requires a network address/NCM port in network applications.

NOTE: The DVC Series consists of all the model versions listed in the bullets below this note. Individual part numbers are used in this manual only when it is necessary to distinguish features or functions that differ. The term DVC is used in all other cases.

  • • DVC-EM – Digital Voice Command, extended memory, wire version (standard)
  • • DVC-EMF – Digital Voice Command, extended memory, multi-mode fiber version
  • • DVC-EMSF – Digital Voice Command, extended memory, single-mode fiber version.

NOTE: The term DAA is used in this manual to refer to all DAA wire and fiber models. Individual part numbers are used only when it is necessary to distinguish features or functions that differ.

Figure 3.13 gives simplified overview illustrations of typical applications for the DVC Series and its Digital Audio Loop (DAL).

Wire and fiber, or multi-mode and single-mode, can be mixed.

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