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| The system network department of strengthgroup
provides system network solution for television and broadcasting
system, and wide band (SDH transmit, ATM exchange, HFC connect)
is its emphasis, as well as provides solution for intranet. |
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Typical
Solution
Wide band ATM based on multi-service ATM
system is the result to fulfil the communicating need for
wide band integrated services digital signals in recent years.
It heightens the transmission speed by means of provide a
method to transmit, multiplex, and exchange for wide band
integrated service digital signals so that language, data,
graphics, and images could be transmitted as a fixed cell
length in one network. |
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Interface
Function
The solution has more
than one interface that can transmit data, voice, images and
so on and the quality is guaranteed.
Its interfaces:
10M, 100M, 1000M Ethernet interface
2M frame relay interface
FDDI, TOKEN, RING interface
Internet access
DDN access
X.25 access
ISDN access
2-622 ATM tache |
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Services:
Connect Internet with computer network
VOD
HDTV
Videoconference
Videophone
Tele-education
Tele-treatment
Videotex
E-business |
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Characteristics:
ATM is an advanced strategical
technology solution, which predigests and unifies the high
integration of information such as voice, images, and data
in network.
ATM system network needs only working equipment
and switch without adjustor and router, thus it is very easy
and convenient for technology support and training.
ATM provides unmatched flexibility that
the customers could communicate and share resource as long
as set up SVC via ATM switch.
ATM ensures fair and cost-efficient bandwidth
utilization.
High-speed wide band transmission
No limit for transmission distance
ATM simplifies network design. |
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ATM over Sonet / SDH
In principle, a transmission
network has two basic equipment that are transmission equipment
and network node. The transmission equipment could either
be cable system, microwave system, or satellite system. The
network node could either be simply node with multiplex or
complex node with transmission, multiplex, cross connection
and exchange. SDH network units was came into being in order
to unify those network node interfaces. |
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Interface
Electricity interface: 2.048 mb/s 34.368mb/s
139.264mb/s 155.520mb/s
Light interface: 155.520mb/s 622.080mb/s
2488.320mb/s
Backward and forward compatibility
ATM FDDI DQDB BISD FR |
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Service
High-speed communication:
efficient data communication, interlinkage
of exchanger, transmission of abundant documents, videotex
of high definition, e-business, video communication,
videoconference, videophone, HDTV, VOD |
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Characteristic
SDH admits three major PDH.
SDH takes 155 mb/s as basic module and
adopts pointer adjust technology and synchromultipling in
which way it simplifies the multiplex and tapout process and
prevent the add-drop process while multiply and demultiply.
SDH unifies electricity interface standard and reduce interface
classes.
SDH offers self-diagnoses and auto-restore
capability so that network could restore all transactions
from malfunction by itself immediately without being noticed.
SDH has flexible rebuild function by means of adopting module
framework to well coordinate with cross-linked equipment and
circuit. Network integrated with SDH eliminate a great deal
of interface switch processes and back-to-back connection
that traditional communication needs. So SDH communicating
network is more economy and reliable.
SDH provides strong network management function to meet all
kinds of management and maintenance needs and intelligentize
network management.
SDH supports ATM and narrow band or wide
band integrated services digital network. |
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CATV
integrated services
HFC
solution
The rapid development of fiber transmission
technology, digital technology and computer technology results
in a revolutionary change of CATV system. The most remarkable
change is that the breakthrough of fiber technology in 1310nm
and 1550nm has totally changed the traditional full cable
CATV network frame and formed HFC structure. HFC not only
improves the CATV transmission quality and reliability but
also forms a bidirectional basic transmission structure with
favorable performance. And the band width could be enlarged
to 1000MHz. |
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Interface
HFC
has three key equipment: HDT, NIU and FN. Their interface
functions are as follows:
HDT
2 mbit/s interface or V5 interface or V5.2
interface
Radio modem interface
OAM interface
Light interface
RF interface |
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Services
Tele-education
Digital broadcasting e-library
Analog TV e-business
Digital TV videophone
VOD videoconference
Data broadcasting tele-meter reading
Videotex
Internet access |
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Characteristics
Low transmission loss, 155nm light signals, attenuation<0.25db/km
Band width: 5-1G
No disturbance among fibers
High transmission quality
Strong reliability
Well performance
Strong compatibility |
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Intelligent Residence
