Руководство По Проектированию для Cisco DNCS System Release 2.7 3.7 4.2
4000358 Rev B
Introducing DOCSIS
1-5
Terminology,
Continued
Term
Definition
DAVIC-capable only
A DAVIC-capable only DHCT does not have a tuner
to support DOCSIS. Cisco’s DHCTs prior to the
Explorer 4200 DHCT are DAVIC-only. For example,
the Explorer 3100 DHCT is DAVIC-only.
DAVIC mode
A communication mode of the DHCT in which all
communications (including DBDS broadcast and
unicast data) use the DAVIC channel. The DOCSIS
channel is not used.
DBDS broadcast data
Data that is broadcast by the DBDS to DHCTs. This
data includes UNConfigIndication messages,
UNDownload messages, UNPassthru messages, out-
of-band conditional access (CA) messages, and out-
of-band system information (SI).
Demilitarized Zone (DMZ) A demilitarized zone is used by a company that
wants to host its own Internet
The DMZ is located between the Internet and an
internal network's line of defense that is a
combination of
services without
sacrificing unauthorized access to its private
network.
firewalls and bastion hosts
Typically, the DMZ contains devices accessible to
Internet traffic, such as Web (
.
HTTP ) servers, FTP
servers, SMTP (e-mail) servers, and DNS
DHCT Communication
Mode (DCM)
servers.
The DHCT Communication Mode is the mode that
the DHCT uses to communicate with other
equipment in the DBDS or DOCSIS environment.
The DHCT has three communication modes:
•
•
DAVIC
•
Mixed DOCSIS/DAVIC
•
DOCSIS
DHCT Customer Premise
Equipment
The DHCT CPE is the operating system (OS) and
application software components that provide core
DHCT functionality. The DHCT CPE is internal to
the DHCT.
Terminology,
Continued