Huawei TX50 Manual page 48

TX50 Videoconferencing Endpoint
Product Overview
demilitarized zone
(DMZ)
domain name system
(DNS)
dual tone multiple
frequency (DTMF)
E
EUA
enterprise unified
address book (EUA)
G
G.722
G.728
H
H.239
H.263
H.264
H.323 protocol
HD
HD display
HDMI
HEVC
Issue 05 (2017-10-31)
A buffer area between an insecure system and the secure system and is used to solve
the problem that the external network equipped with a firewall cannot access the
internal network server. The DMZ is located between the internal network and the
external network. In the DMZ, some public server facilities, such as the enterprise
Web server and FTP server, can be located. The DMZ effectively protects the internal
network.
A mechanism of mapping easy-to-remember domain names to IP addresses
recognizable for network devices.
Multi-frequency signaling technology for telephone systems. According to this
technology, standard set combinations of two specific voice band frequencies, one
from a group of four low frequencies and the other from a group of four high
frequencies, are used.
See 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 have
simultaneous transmission of 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 characteristics.
A communication control protocol defined by the International Telecommunication
Union (ITU). It offers multimedia services in the packet-switched (PS) network. Call
control is an essential component in H.323 and is used to establish point-to-point
media sessions and multi-point media conferences.
See high definition.
A HD plasma TV that is used to display the video from a telepresence codec.
See high definition multimedia interface.
See High Efficiency Video Coding.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
A Glossary
41