Cisco Model 6109 6 MHz Off-Air Reference (NTSC) Guide De Montage
Chapter 1 Overview
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Resource Adaptors
The term resource adaptor refers to the software component used to signal to a
resource. For example there are several QAM signaling interfaces in use - Generic
QAM Interface (GQI), R6, and D6. A resource model contains a standard naming
convention data item that defines the resource adaptor name. When a resource is
loaded, the corresponding resource adaptor is also activated to communicate with
the device, effectively pulling the resource adaptor into the configuration when a
resource that needs the adaptor is created. Typically, only a single instance of the
adaptor is activated.
resource. For example there are several QAM signaling interfaces in use - Generic
QAM Interface (GQI), R6, and D6. A resource model contains a standard naming
convention data item that defines the resource adaptor name. When a resource is
loaded, the corresponding resource adaptor is also activated to communicate with
the device, effectively pulling the resource adaptor into the configuration when a
resource that needs the adaptor is created. Typically, only a single instance of the
adaptor is activated.
Applications
An application is a software package that provides a network service. An
application typically exposes a network connection and passively waits for requests
from client devices. For example, the SDV session manager application opens a User
Datagram Protocol (UDP) socket that waits for channel change requests and
activates the requested service upon receiving the request.
application typically exposes a network connection and passively waits for requests
from client devices. For example, the SDV session manager application opens a User
Datagram Protocol (UDP) socket that waits for channel change requests and
activates the requested service upon receiving the request.
Component Interaction
Resource models, resource adaptors, and application software components are
fundamentally the same at the software construction level. The primary difference is
how the components interact with client devices.
fundamentally the same at the software construction level. The primary difference is
how the components interact with client devices.
A resource model is a representation of a client device.
A resource adaptor is used to actively manage a connection to the client device. The
adaptor typically creates a full-time connection to the client device used for active
management to the client.
adaptor typically creates a full-time connection to the client device used for active
management to the client.
The platform software then essentially "owns" the client device. Other systems (e.g.,
servers) that need to use the device must request a reservation on the device from
the platform. An application implements the inverse of this management
connection, i.e., it waits for the connection to be created.
servers) that need to use the device must request a reservation on the device from
the platform. An application implements the inverse of this management
connection, i.e., it waits for the connection to be created.