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What is
DialSat? |
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From basic telephony to
high speed internet :
- Public voice service: Prepaid,
Public cal Offices (PCO), Stand alone payphones
- High speed internet service
- Advanced features for SOHO
and small businesses (e-mail,
e-commerce services s etc.)
- Fax (G3 Standard)
- Voice Mailing for incoming
calls to payphones
- Leading the rural telephony
market
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- DialSat
is the first platform in the market to
have operational bundled Telephony and high
speed solutions
- Toll quality telephony
- Always on Advanced services
- Mesh or star architecture
- Up to 6 voice lines
- Gateways solutions
- Add-on services
- Unique satellite access scheme
- Lowest VSAT power consumption
- Telephony and applications
using the same hub based-band, NMS and VSAT
equipment
- "Always on" High
speed Internet service
- High bt rates for high
speed access
- Inbound : Up to 153.6 KB
- Outbound : Up to 8 MB
- LAN Connectivity on VSAT board
- not occupying a phone line
- Asymmetric packet switched
network access
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| VSAT
- OUTDOOR UNIT (ODU) |
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- Standard TVRO LNB
- SSPA
- KU-band : 0.5W,
1W
- C/XC-band :
2W
- Enhanced Operating
Temperatures:
-40° to +60°C, up to 100% humidity
- Typical Antenna
Sizes
- KU-band : 0.6
to 1.2m
- C/XC-band 1.8
m
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- In Door Unit(IDU) with 3
expansion slots each with 2 FXS RJ-11 interface
- On
Board LAN port
- Low
power consumption AC or DC feed
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DialSat
Built to Perform and Expand with Ease. The
DialSat is designed for maximum performance,
flexibility and quality: toll-quality, full
duplex voice; automatic voice/fax/data channel;
two-way, always on asymmetric routing and
more. Read below for detailed information
on DialSat architecture and technical specifications.
Architecture DialSat network consists of a
central hub, Multiple PSTN gateways, satellite
channels and remote terminals (VSATs).
A remote terminal
consists of a small outdoor antenna (typically
0.55 to 1.2 meters), an Outdoor Unit (ODU)
and an Indoor Unit (IDU). The hub consists
of an RFT and base band equipment. The base
band includes a Hub Satellite Processor (HSP),
a Hub Voice Processor (HVP), a Hub Protocol
Processor (HPP) and a Network Management System
(NMS). Each HVP can be connected directly
to the PSTN using a digital E1 line. The HPP
is used to interface with the Internet Service
Provider (ISP). The hub design permits easy
scalability and incorporation of new features.
DialSat's Network Management System enables
to monitor and control the remote terminals,
and to gather call data records from the sites
for billing operations. Client-server architecture
enables remote NMS capability. PSTN gateways
are remote terminals that serve a different
function. They establish digital E1 connectivity
with several central offices in various locations.
There are two options available. Satellite
gateways, which utilize satellite channels,
and terrestrial gateways, which carry compressed
voice data over terrestrial leased lines.
Bundled Telephony
and Internet Voice/Fax/Data Transmission With
DialSat, the analog voice input is digitized
and compressed to 4.8 or 6.4 kbps. The compressed
voice is packetized and transmitted to the
hub or to another remote terminal via the
satellite. At the destination, a voice/fax/data
card decodes the incoming voice packets into
digitized voice, which is then reconverted
into analog form. The voice/fax/data channel
is configured for voice mode by default. When
a Group 3 fax transmission is detected, the
channel automatically switches to fax mode.
Upon completion of the fax message, the channel
automatically returns to voice mode. Internet
Access The DialSat provides two-way, always
on asymmetric routing. The data is time-Multiplexed
with the telephony data, enabling simultaneous
telephone calls and Internet browsing. Internet
access is carried out without occupying a
telephone line. The hub transmits a high-speed
outbound carrier of up to 8 Mbps containing
data. The VSATs transmit an inbound carrier
of up to 153.6 kbps. The VSAT acts as a router,
enabling the connection of more than one PC.
An Ethernet LAN port at the VSAT is used for
PC connection (RJ-45). Internet enabling technologies
such as TCP spoofing and Internet Page Acceleration
are incorporated to ensure a superior user
experience. |
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