Raisecom
Gazelle ST2028i (A) Hardware Description
6 Appendix
Raisecom Proprietary and Confidential
Copyright © Raisecom Technology Co., Ltd.
40
Grounding
cable
Connecting the device to the ground, usually a yellow/green coaxial cable
H
Half duplex
In a communication link, only one party can send data at a time.
I
IEEE
American Institution of Electrical and Electronic Engineers
Industrial
Ethernet
switch
Developed for applications in the industry. Compared with traditional
business Ethernet switch, the industrial Ethernet switch is cost/effective,
with stable and closed chassis design, no fan for dissipation, power input
overloading, overcurrent detection, EMC, etc. it can adapt to severe and
dangerous industrial environments, such as mining, power grid, and
railway.
L
Link
Aggregation
A computer networking term which describes using multiple network
cables/ports in parallel to increase the link speed beyond the limits of any
one single cable or port, and to increase the redundancy for higher
availability.
M
Multi-mode
fiber
In this fiber, multi-mode optical signals are transmitted.
Q
QinQ
QinQ is (also called Stacked VLAN or Double VLAN) extended from
802.1Q, defined by IEEE 802.1ad recommendation. Basic QinQ is a
simple layer-2 VPN tunnel technology, encapsulating outer VLAN Tag
for client private packets at carrier access end; the packets take double
VLAN Tag passing through trunk network (public network). In public
network, packets only transmit according to outer VLAN Tag, the private
VLAN Tag are transmitted as data in packets.
R
RS232
In synchronization transfer mode, no handshaking signals, able to
communicate with RS232 or RS422 devices point to point, in transparent
transmission, with a maximum rate of 19.2 Kbit/s
S
