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Terrestrial
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The
Digital Data Network (DDN) has been established by subsidiary
Smart Highway Co Ltd. Using the latest digital cross connect
technology, it is now possible to provide reliable, high-speed
data transmission facilities for private companies. To complete
the package, the firm provides access to the network and related
equipment wired direct to customers' premises. |
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Satellite |
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With
their ability to overcome a variety of difficult geographical
conditions, as well as their overall stability, satellites
are playing a more important role in communication systems
including those using Internet Protocol.
Subsidiary company Acumen
Co., Ltd., with its expertise in this area, was the successful
bidder for the two 15-year concessions offered by the Telephone
Organisation of Thailand (presently known as TOT Public Co., Ltd. (TOT) to operate and maintain a TDMA satellite
network as well as to provide a VSAT service through its
Integrated Satellite Business Network (ISBN). Using a Shared
Hub Network configuration, the system provides high performance,
low to medium speed data links from subscribers' headquarters
to branches across the country. Businesses such as banks,
hotels and dealership networks benefit from this economic
and reliable system.
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The
services available through the ISBN network include data through
the Personal Earth Station system and voice through the Telephony
Earth Stations (TES) system. TES connections are crisp, clear
and continuous, regardless of weather or terrain. Unlike normal
telephones, TES function perfectly in areas where infrastructure
is unstable or inconsistent, so if connections to the fixed-line
network are difficult, this is a better solution. The latest
compressed speech algorithms offer the clearest, non-echo
transmissions possible, with 24-hour customer support services
nationwide The system has a self-diagnostic facility to ensure
greater reliability. |
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High
security connections can be made with digital encoding direct
to fax or modems for Internet purposes, supporting all protocols
such as TCP/IP, DECnet, NetBIOS, AppleTalk, LAN Manager, SNA/SDLC,
Telenet, TN 3270, Netware, VINES, XNS, SLIP and PPP, with
seven-digit numbers available exclusively to each user at
a single, low-rate charge across the country. Instant installation,
removal, relocation or modification is available, within a
week of receiving the order. |
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Acumen
has also joined a consortium to operate Sky LAN, which allows
simultaneous transmission of batch files from the hub, with
the time required to deliver the files being independent of
the number of sites. Address filtering SkyLAN distinguishes
between local and distant LAN traffic, and transmits only
that data which is addressed to a distant LAN, optimising
network efficiency and ensuring high throughput. |
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Being
self learning and aging, SkyLAN learns the address of devices
on the local network, simplifying network reconfiguration
requirements. The so-called aging of these addresses removes
them from the address table when they are inactive for a user-specified
period. It is protocol transparent because SkyLAN is insensitive
to the type of traffic protocol; new applications with different
Protocols can be added to SkyLAN. |
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Also
available are video conference facilities which can enhance
the efficiency of any business. The firm is a turnkey service
provider, with 24-hour system troubleshooting and hardware
maintenance. Link set-up for video on demand can be arranged,
with maintenance contracts and management fees set at affordable
rates. The firm offers intensive training courses, and comprehensive
packages including all audio and video accessories, conference
room modifications, and mobile video conference trucks or
vans for rental or outright purchase. |
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Submarine
Cable |
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When
the Telephone Organisation of Thailand (presently known as
TOT Public Co., Ltd. (TOT) ) realised the need
to provide a reliable transmission system to satisfy the need
for telephone lines in all areas of the country, Jasmine Submarine
Telecommunications Co., Ltd. (JSTC) was awarded a 20-year
concession as co-investor. The company designed and constructed,
and now operates and maintains an underwater fibre-optic cable
system along Thailand's southeastern coast. The cable was
ploughed into the sea bed to maximise security and minimise
risks associated with fishing activities. |
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The
cable incorporates 12 fibre-optic cores, transmitting digital
signals at 565Mbps, providing about 7,500 circuits per pair.
TOT uses around 15,000 circuits and only six fibre cores.
Excess capacity is available for future projects such as expansion
of Internet Protocol networks. |
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In
1995 the network was expanded by subsidiary Thai Long Distance
Telecommunications Co., Ltd, along the west coast of Thailand.
This expansion provided much-enhanced communication with Malaysia
after cooperation with Malaysian Time Telekom. It improved
the reliability of the overall system, and moved towards the
development of TOT's international
gateway. This second cable incorporates 24 fibre-optic cores
and data speeds of 2.5Gbps. TOT uses around 10,000 circuits.
Expansion to Myanmar, Cambodia and Vietnam is planned. |
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| For
more information in part of JSTC, please contact |
| Mr.
Poonsavas Sukosi |
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| Vice
President, Operation & Maintenance |
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| Tel
: 0-2502-3158 |
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| For
more information in part of Acumen, please contact |
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| Mrs.
Jirawat Prayoonyuang |
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| Senior
Sales Manager |
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| Tel
: 0-2502-3191 |
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TH 
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