Cisco DNCS System Release 2.7 3.7 4.2 デザインガイド
1-6
Introducing DOCSIS
4000358 Rev B
Term
Definition
Digital Broadband
Delivery System (DBDS)
The entire network architecture of Cisco’s digital
system that ultimately provides signal to and from a
subscriber’s DHCT. The DBDS consists of five areas:
sources, headend, transport network, hub, and
access network.
Digital Home
Communications Terminal
(DHCT)
Cisco’s digital set-top converter that is two-way
capable for interactive services.
Digital Network Control
System (DNCS)
The DNCS is a computer server that is used to
monitor and control the DBDS network elements.
Generally located at the DBDS headend, although it
may be located elsewhere and remotely connected to
the DBDS.
DOCSIS
Data-Over-Cable Service Interface Specifications that
define interface standards for cable modems and
supporting equipment. For more information on
DOCSIS, refer to the following specifications:
•
•
Data-Over-Cable Service Interface Specifications
Radio Frequency Interface Specification
•
Data-Over-Cable Service Interface Specifications
Cable Modem to Customer Premise Equipment
Interface Specification
•
Data-Over-Cable Service Interface Specifications
Operations Support System Interface Specification
For copies of these specifications, go to the
CableLabs web site at the following address:
http://www.cablelabs.com/
http://www.cablelabs.com/
DOCSIS-capable
The ability to use a DOCSIS channel. For example,
the Explorer 4200 DHCT is DOCSIS-capable.
DOCSIS or DSG mode
A DHCT communication mode in which all
communications (DBDS broadcast data and unicast
data) use the DOCSIS channel. The DAVIC channel
is used, if available, as a redundant source of DBDS
broadcast data.