Raisecom
Gazelle ST2028i (A) Hardware Description
6 Appendix
Raisecom Proprietary and Confidential
Copyright © Raisecom Technology Co., Ltd.
41
Single-mode
fiber
In this fiber, single-mode optical signals are transmitted.
STP
(Spanning
Tree
Protocol)
STP can remove loopback in a LAN and backup data links. Thus it can
logically block loopback and avoid the generation of broadcast storm.
When the unblocked link fails, the blocked link will be activated and
serve as a backup line.
U
U
Unit of dimension, short for unit. It takes 44.45 mm as basic unit; namely
1 U = 44.45 mm
V
VLAN
(Virtual
Local Area
Network)
VLAN is a protocol proposed to solve broadcast and security issues for
Ethernet. It divides devices in a LAN into different segment logically
rather than physically, thus implementing virtual work groups which are
based on Layer 2 isolation and do not affect each other.
6.2 Acronyms and abbreviations
A
AN
Access Node
B
BPDU
Bridge Protocol Data Unit
D
DC
Direct Current
DFB
Distributed Feed Back
DHCP
Dynamic Host Configuration Protocol
E
ETSI
European Telecommunications Standards Institute
G
GE
Gigabit Ethernet
GMRP
GARP Multicast Registration Protocol