Raisecom
RC3000-15 (P100R001) Hardware Description
14 Appendix
Raisecom Proprietary and Confidential
Copyright © Raisecom Technology Co., Ltd.
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H
Half duplex
In a communication link, both parties can receive or send data at a
time.
I
Institute of
Electrical and
Electronics
Engineers
(IEEE)
A professional society serving electrical engineers through its
publications, conferences, and standards development activities. The
body responsible for the Ethernet 802.3 and wireless LAN 802.11
specifications.
ITU-T
International Telecommunication Union-Telecommunication
Standardization Sector
L
Label
Symbols for cable, chassis, and warnings
Loopback
It is the process that a signal is sent out and then sent back to the
sender. It is used to detect and analyze potential faults in a ring
network.
M
Multi-Mode
Fiber (MMF)
In this fiber, multi-mode optical signals are transmitted.
Multiplexer
The device to multiplex multiple tributary signals to several bearing
channels
Multiplex
Section
Protection
(MSP)
MSP is based on multiplex sections. Whether to perform switching
depends on the quality of multiplex section signals. Switching is
initiated by the APS protocol carried by the Multiplex Section
Overhead (MSOH). If a multiplex section fails, service signals of the
whole STM-N are switched to the backup channel.
R
RS232
It is an Asynchronous Transfer Mode (ATM), which does not contain
hand-shaking signals. It can carry on point-to-point communication
with RS232 and RS422 of other stations, featuring transparent
transmission, with a maximum rate of 19.2 kbit/s. Generally, the form
of RS232 interface is DB9 or DB25.
S
Single-Mode
Fiber (SMF)
In this fiber, single-mode optical signals are transmitted.