Cisco Model 6109 6 MHz Off-Air Reference (NTSC) Installation Guide
Chapter 1 Overview
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USRM Block Diagram and Nomenclature
This section defines the USRM components and nomenclature. The USRM software
consists of a set of modular software components. Base "platform" components
provide the basic USRM functions. Applications, resource model, and resource
adaptor "plug-in" components are then installed on the USRM to implement a
specific application service with specific protocols and network devices.
consists of a set of modular software components. Base "platform" components
provide the basic USRM functions. Applications, resource model, and resource
adaptor "plug-in" components are then installed on the USRM to implement a
specific application service with specific protocols and network devices.
The USRM can be envisioned as a software representation of a traditional
communications equipment chassis. An application, like a front line card is installed
on the USRM to provide a specific application service (e.g., SDV). Resources, like the
rear I/O card, are called resource models and are installed on the USRM to support a
specific device (e.g., xDQA-24). Unlike a communications chassis, the USRM must
support many protocols on its midplane. The resource adaptor is installed to
implement a specific communications protocol (e.g., GQI, R6, etc.).
communications equipment chassis. An application, like a front line card is installed
on the USRM to provide a specific application service (e.g., SDV). Resources, like the
rear I/O card, are called resource models and are installed on the USRM to support a
specific device (e.g., xDQA-24). Unlike a communications chassis, the USRM must
support many protocols on its midplane. The resource adaptor is installed to
implement a specific communications protocol (e.g., GQI, R6, etc.).
A block diagram of the USRM is shown in the following illustration.
Note: In all USRM block diagrams, resource models and adaptors are shown on the
bottom of the platform. Applications are shown on top.
bottom of the platform. Applications are shown on top.