Table of Contents
Advertisement
HUAWEI Board
Product Description
CSCF
D
DMZ
DNS
dual stream
DVI
DVI-I
E
EUA
G
G.722
G.728
H
H.239
H.263
H.264
Issue 02 (2018-10-22)
the demarcation point.
Call Session Control Function
The core component of the IMS network. It performs the functions
such as registration, authentication, session control, service
triggering, topology hiding, QoS control, NAT traversal, and security
management.
demilitarized zone
A buffer area between an insecure system and the secure system and
is used to solve the problem of an external network being unable to
access an internal network equipped with a firewall. The DMZ is
located between the internal network and the external network. The
DMZ contains some public server facilities, such as the enterprise
Web server and FTP server. The DMZ protects the internal network.
Domain Name System
A mechanism that maps easy-to-remember domain names to IP
addresses recognizable for network devices.
During a conference, two channels of video streams can be sent or
received simultaneously. One channel is used for transmitting video
(such as the video captured by a camera) and the other channel is
used for transmitting presentation (such as a computer desktop).
Digital Visual Interface
Digital Visual Interface-Integrated
Enterprise Unified Address Book
A next-generation address book server launched by Huawei. It
provides LDAP-based unified address book services for Huawei
videoconferencing and enterprise communication solutions.
Audio codec standard that uses adaptive differential pulse-code
modulation (ADPCM). Its data rate is 48 kbit/s, 56 kbit/s, or 64
kbit/s.
Audio codec standard that uses low-delay code excited linear
prediction (LD-CELP). Its data rate is 16 kbit/s.
A standard recommended by ITU-T. It enables a video conference to
simultaneously transmit both video and data content (for example,
computer desktop).
A video codec standard for video conferences at low rates. Five
formats are available: SQCIF, QCIF, CIF, 4CIF, and 16CIF.
Compared with H.263, H.264 can provide the same-quality video at
half of the bit rate, with strong error resilience.
Copyright © Huawei Technologies Co., Ltd.
A Glossary
46
Advertisement
Table of Contents
