Cisco Headend Digital Broadband Delivery System Referencia técnica
2-2
OCAP System Implementation
738184 Rev B
SR 4.0 System Support
Overview
With SR 4.0, cable service providers can choose to add OCAP applications and
OpenCable network components. Customers with SR 4.0 must purchase a license to
add the object carousel support for the OCAP platform to their system.
Object Carousel Output Types
The OCAP object carousel has the following three output types:
•
•
Output over Ethernet to the DNCS for the XAIT kit (XAIT Delivery)
•
Output over ASI (or Gigabit Ethernet) to the QAM modulator for the OCAP object
carousel that is transmitted inband
•
Output over Ethernet to a QPSK modulator for OOB OCAP object carousel (or over
DOCSIS
®
Set-Top Gateway [DSG])
XAIT Delivery
The object carousel builds an XAIT kit. The XAIT kit consists of a zip file. The zip file
The object carousel builds an XAIT kit. The XAIT kit consists of a zip file. The zip file
contains two files: a binary file of the XAIT and an XML file containing the binary
file name and configuration information. The object carousel interface delivers the
XAIT kit to the DNCS anytime an unbound OCAP application is added or deleted.
OpenCable Common Download
Cisco designed OCAP to support the OpenCable Common Download method for
OpenCable Common Download
Cisco designed OCAP to support the OpenCable Common Download method for
firmware download. The host firmware data may be downloaded through the
Common Download data carousel. The DNCS OCAP Common Download Manager
(ocdlManager) application provides the common download function for the DNCS.
Signaling is done using the SCTE 28 System Control resource (same as the OpenCable
Common Download Specification).
The ocdlManager uses a Web User Interface (WUI) that provides the ability to load
The ocdlManager uses a Web User Interface (WUI) that provides the ability to load
and playout a Common Download Code Version Table (CDVT) file set.
The CableCARD module implements common download signaling to use the OOB
The CableCARD module implements common download signaling to use the OOB
forward data channel (FDC), either QPSK or DSG. This implementation for
upgrading an OpenCable-compatible host meets the requirements of the OpenCable
Common Download Specification.