DSD, your satellite gateway to Internet
Thanks to the most advanced VSAT satellite Internet Access technologies offered by DSD, you can get a fast Internet access wherever you are in the word!
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We are working hard every day to offer to our clients the most impressive VSAT satellite Internet speeds and reliability. Our best picks are “Great just isn’t good enough.” And “Focus on the user and all else will follow. “
Latest Satellites
Eutelsat E10A C-band Africa
Eutelsat E10A C-band satellite (replacing the broken Amos 5) has a strong coverage of all the African continent ensuring top of the range services
Yamal 402 Ku-band Africa
Yamal 402 is a great new satellite for sub-Sahara African area alloying is to offer the highest Ku-band availibity services
Intelsat 25 C-band Africa
Intelsat 25 C-band satellite is a great C-band satellite for dedicated enterprise networks and dedicated 100% guaranteed bandwidth services
Anik G1 Ku-band America
Anik G1 satellite is ideal for south America area alloying us to offer the highest availability for Ku-band services in south America
Top 4 services
iDirect Evolution X3 & X5
iDirect Evolution technology is the leading technology for shared satellite Internet access and enterprise networks
SCPC
SCPC is the greatest technology for 100% guaranteed bandwidth service on point-to-point links
DVB-S2/SCPC
DVB-S2/SCPC is the most advanced technology for 100% guaranteed bandwidth Internet access services
Newtec Sat3Play
Newtec technology is the best technology for ADSL via satellite services and can bring very high bandwidth rates directly to home and small offices
ADSL via Satellite
ADSL Scroll3
AVAILABLE EVERYWHERE
The ADSL via satellite service is available throughout sub-Saharan Africa with a reliable broadband connection, especially for underserved regions by the optical fiber and other terrestrial broadband services
FAST AND FLEXIBLE
Broadband Internet access ADSL via satellite is fast and reliable. The broadband ADSL via satellite offers a range of highly flexible services covering most market needs. This offer is constantly updated with new specialized services that target the most demanding end client and institutions
VoIP Telephony
ADSL satellite enables high quality VoIP telephony via the Internet anywhere in the world at low cost while simultaneously allowing you to navigate on the Internet.
FULL ACCESS TO THE WEB
ADSL via Satellite is not filtered, you can use all the ports and the Internet protocols that you need
VoIP Services
DSD is proud to announce his satellite broadband Internet access ready for VoIP use. With special chipset integrated in the new ranges of modems, placing VoIP call through satellite broadband Internet access has never been so efficient and so cheap !
With developments in IP networking in general and the Internet in particular, the ability to transmit voice calls which have been traditionally handled by the public switched telephone network (PSTN) over a lower cost IP infrastructure has become a reality. More and more users are researching VoIPcapability when purchasing a connection to the Internet or simply expanding their private intranet. VoIP based telephony has also provided a very cost-effective solution for companies that have locations in many disparate regions and require connectivity back to their headquarters.
When engineering a satellite network capable of effectively handling VoIP, there are several important elements that require consideration.
Latency:
There is approximately 280 msec of one-way propagation delay due to the location of the Geo Stationary orbit and the speed of light. Regardless of the satellite product, this propagation delay
must be considered and overcome. Today, numerous overseas calls originated in the United States are actually transmitted as VoIP over satellite calls, particularly if provided by the smaller long distance carriers.
Jitter:
Quantifies the effects of network delays on packets arriving at the receiver. Packets transmitted at equal intervals from the transmitting gateway arrive at the receiving gateway at irregular intervals.
Excessive jitter has the effect of making speech choppy and difficult to understand. Jitter is calculated based on the inter-arrival time of successive packets. For high-quality voice, the average inter-arrival time at the receiver should be nearly equal to the inter-packet gaps at the transmitter and the standard deviation should be low. Jitter buffers (packet buffers that hold incoming packets for a specified amount of time) are used to counteract the effects of network fluctuations and create a smooth packet flow at the receiving end.
Packet Loss:
Packet loss or packet corruption will cause degradation of voice quality. Since all of the voice traffic is UDP/IP and would not be retransmitted (like in the case of TCP/IP) all packets would be
completely lost if the packet becomes lost or corrupted. It is extremely important to have very low Bit Error Rates (BER) to ensure low or no corruption or loss.
QoS and Traffic Prioritization:
Packet switched networks are subject to congestion as typical data traffic is bursty. Congested networks can wreak havoc on a VoIP call with delayed , dropped , or packets that are out of sequence . It is a necessity to have QoS and Prioritization in order to guarantee delivery of VoIP traffic through congested links.
Compression Technologies:
There are many encoding schemes that have been standardized for voice. The most dominant standard in the industry is the G.729 codec. G.729 encoding requires 8Kbps of bandwidth, but because of the overhead associated with IP/UDP/RTP headers, the actual bandwidth needed is between 16 and 18Kbps (depending on the equipment vendor and configuration).
With Compress RTP (cRTP) the total bandwidth requirement per call will drop to about 10Kbps. There are other standards, such as G.723 that takes only 5.3Kbps for the voice payload.
Required bandwidth per VoIP call:
To design a network properly, one would need to know the amount of bandwidth required per VoIP call, the number of concurrent calls, and the duration of the
call. Bandwidth required per VoIP call will depend the encoding standard used, header compression, and payload size. For example, with G.729(b), payload of 40 bytes, and no header compression, a VoIP call would take about 16Kbps of bandwidth. With header compression this would require 10Kbps
of bandwidth.
Comtech EF Data
Advanced Communication Solutions
Comtech EF Data Corporation, a subsidiary of Comtech Telecommunications Corporation (NASDAQ: CMTL), is the recognized global leader in satellite bandwidth efficiency and link optimization. Their advanced communication solutions encompass Advanced VSAT Solutions, Modems, RAN & WAN Optimization, Managed Bandwidth, RF Products, and more. The solutions enable commercial and government users to reduce OPEX/CAPEX and to increase throughput for fixed and mobile/transportable satellite-based applications.
Products are designed and manufactured at our Tempe, Arizona USA plant. Our well-maintained facilities are configured to support current and planned production requirements. We employ formal quality management programs and training, including the International Standard Organization’s (“ISO-9000”) and Aerospace Standard (“AS9100”) quality procedure registration programs.
Comtech EF Data members are recognized as a technology innovator, and have a reputation for product quality and reliability.
Examples of our technologies that optimize satellite communications are:
- DoubleTalk® Carrier-in-Carrier® Bandwidth Compression
- VersaFEC® Forward Error Correction
- Adaptive Coding & Modulation
- DVB-S2
- Low Density Parity Check Coding (LDPC) & 8-QAM Modulation
- 2nd Generation Turbo Product Coding
- Integrated Router
- Radio Access Network (RAN) Optimization
- WAN Optimization
- Dynamic Single Carrier per Channel
- Daisy Chain Redundancy Switching
Comtech EF Data products are installed in 160+ countries. They provide “around the clock” customer support and have authorized service centers globally. We are prepared to help you optimize bandwidth, reduce OPEX/CAPEX associated with satcom, and lower the total cost of ownership.
Satellite VPN
A powerful satellite VPN network that takes into account the specificities of the satellite
The satellite Internet connections have the distinction of having a high latency between 550ms and 800ms.
To make sure the flow rates are good and enjoyable Internet navigation, satellite modems incorporate TCP IP accelerators or accelerators to better manage TCP including acknowledgment packets. When setting up the VPN boxes usually used on low-latency connections like xDSL or fiber, these optimizations are blocked because the VPN uses UDP rather than TCP and flows within the VPN are very bad.
The satellite VPN solution of DSD, Virtual Private Network satellite uses VPN boxes that integrate IP or TCP accelerator and you guarantee website communications reliable and secure site, high performance for companies that have more growing need for highly reliable to ensure certain key transactions between many sites links.
VPN virtual private network (VPN) allows a company to expand its geographical connectivity with enhanced security and reduced compared to conventional networks operating costs.
Unlike a dedicated, for example, a leased line can be very expensive connection, a VPN uses "virtual" connection via the Internet from the company's network to connect remote sites or users within a network private.
VPN satellite have long had a reputation for being inefficient.
Today, DSD satellite VPN solution associated with broadband satellite connections provide quality and reliability of the first order.
iDirect
iDirect’s satellite-based IP communications technology enables constant connectivity for voice, video and data applications in any environment. Through our vast network of global partners you will find broadband access solutions for telecommunications carriers, enterprise customers and military and government organizations. iDirect’s partners can utilize our platform to extend private networks to remote offices, support mobile connectivity across land, sea and air, providing high-speed broadband access anywhere in the world.
Visit iDirect Websat : http://www.idirect.net
The main iDirect modem routers are :
Modem iDirect Evolution X3
Modem iDirect Evolution X5 that also replaces the old iDirect Infinity 3100 modem
Typical iDirect Enterprise Network with VoIP
iDirect technology offers a full line of compact satellite routers that integrate all in one devices with :
> a satellite modem and IP router with:
+ TCP optimization over satellite
++ QoS prioritization
+++ compression
in an easily deployed, reliable one-box design.
DSD Telecom now offers premium iDirect shared and dedicated Internet access for any place in the world. DSD iDirect satellite services are available in Ku-band and C-band all over the world as well has Ka-Band is some regions only. To have any information on our iDirect services please ask for a iDirect hardware and service quotation or visite one of the following pages :
iDirect services for autodeploy based antennas
Auto deploy VSAT
DSD Auto-Deploy VSAT Antenna R-Mobile systems
The auto deploy VSAT Antenna DSD range is offering from 98 cm to 1.8m auto-acquire satellite VSAT antenna systems which can be mounted on the roof of a vehicle for direct broadband access over any configured satellite. The system works seamlessly with the auto pointing VSAT Controller providing fast satellite acquisition within minutes, anytime anywhere.
If you operate in Ku-band, the 98cm or 120cm systems are easily configured to provide instant access to satellite communications for any application that requires reliable and/or remote connectivity in a rugged environment. If you operate in C-band, the 180cm will be the good choice. Ideally suited for industries such as Oil & Gas Exploration, Military Communications, Disaster Management, SNG, Emergency Communications Backup, Cellular Backhaul and many others.
This 0.98m and 120cm motorized VSAT are the vehicle mounted antennas of choice even for satellite footprint fringe areas. The auto deploy antennas are also used in high bandwidth Satcom situations, including: mobile office, classroom, bookmobiles and emergency response.
The DSD auto deploy, auto pointing VSAT Hi-Roller Equipped Platform (Cross Pol) Complete with Hi-Roller Bracket, Reflector, Reflector Back Cover, Feed Assembly, Feedarm, Flexible Wave Guide - (Requires a Controller and Cables).
DSD auto deploy VSAT antenna range R-Mobile
DSD is a leader in deployment of fully automated, self-aligning mobile satellite antenna systems for the delivery of two-way high-speed Internet services.
mobile satellite internet auto-pointing
DSD R-Mobile system is fully compatible with many of the worlds leading satellite-based Internet providers, namely; Comtech, EMS, HNS Direcway, iDirect, Nera, Tachyon, ViaSat, Gilat and Gilat-based systems such as SkyEdge and Starband for global versatility and applications.
The DSD R-Mobile System offers you the complete freedom of mobility! Every time you move and relocate, the DSD R-Mobile System can easily compensate for any change in location, orientation, and even a variation in slope. Virtually allowing you the ability to go online from almost anywhere on the globe, the DSD R-Mobile System is the ideal solution for your Broadband Satellite needs.
Using a high-speed 2-way link, the DSD R-Mobile System allows you to access the Internet from anywhere our satellite Internet access covers.
Mounting easily on top of vehicles (RVs, SUVs, vans, or any other commercial vehicle) or a transportable platform, with the simple click of a button, the R-Mobile System automatically deploys, locks onto the selected satellite, and interfaces with the modem to enable high-speed broadband Internet service.
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DSD is a VSAT expert
DSD is a major satellite data communication provider. Since 1998, DSD helps the companies get profit from the Internet network and has very soon specialized in the VSAT satellite communications. DSD is now able to provide a VSAT satellite data connexion in any place of the world with the best VSAT technologies on the market alloying to setup private satellite networks or satellite Internet connexions.
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