Cisco Cisco ONS 15454 SONET Multiservice Provisioning Platform (MSPP) Guía De Diseño

OL-4556-01

 

322

 
The ONS 15454 provides the flexibility required to support the next generation hybrid fiber coax 
(HFC) network recommended by Cable Labs.  The next generation HFC network is based on the 
regional hub concept and includes the following attributes: 
 

    A master headend offering the ability to combine voice, data, and video into ATM cells for 

transmission on a SONET network to secondary headends and regional hubs. 

 

    Centralized regional hubs which allow sharing of common equipment among multiple 

system operators (MSOs) within the region. 

 

    Fiber rings interconnecting hubs and headends extend their reach and offers routing 

capabilities. 

 

    No amplifiers needed for fiber rings. 

 

    Maximum distance between furthest end user node and fiber hub of 80 km. 

 

    The ring topology may interconnect a single operator’s headends or the headends of any 

number of MSOs operating in adjacent serving areas. 

 
Centralization of capital-intensive investments at the regional hub allows the cable operators to 
spread the investments across a wider base and provides a platform for offering a common set of 
services to subscribers and other cable operators. 
 
In Figure 9-42, the ONS 15454 is used to transport voice, data, and video signals from the Master 
Headend to all Regional Headends and Fiber Hubs over OC-12, OC-48, or OC-192 SONET 
rings.