AfriConnect Satellite Technology Overview
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1 AfriConnect Satellite Technology Overview
2 Topics Why VSAT? Defining The Network Requirements Coverage Traffic & Connectivity Features Public & Private Networks Understanding The Technology VSAT Terminal & IDU Transmission Basics Satellite Network What Fits The Application?
3 Why VSAT? Geographic coverage: satellites cover the globe Speed of implementation: terminal can be installed and operating within a day Flexible: supports voice, data, Internet and video Modular: start small - end up big - pay for what you need Reliable: VSAT networks operate at 99+% availability Network management: control over the network, common equipment at each site Cost: capital and operating cost
4 Applications Data transmission point-to-point, point-to-multipoint, broadcast interconnection of LANs coupling of computer centres internet direct access to the backbone connection decentralised database access Voice and fax applications interconnection of PBXs (ISDN E1 Interface) public switched telephone and fax services emergency backup communication facilities Desktop video/multimedia video-conferencing tele-education (distance learning, training) tele-medicine
5 Coverage
6 Teleport Facility
7 Connectivity
8 Connectivity Choices Private Networks Control of QoS, bandwidth, fixed costs Previously only way of getting higher bandwidths Public Networks Shared features Best endeavours rather than guaranteed performance
9 Private Network Closed VSAT network, no shared traffic Reduced security issues, internal network only Guaranteed delivery time across network Single satellite hops for voice possible Any configuration Star, mesh, partial mesh, dynamic pooled bandwidth, burstable bandwidth Diverse routing & redundant systems Services Voice (circuit switched and IP), async data, TCP/IP, UDP, voice conferencing, multicast services, VPN Any bandwidth up to 100Mbps
10 Public Broadband IP Service Two-way broadband satellite access data rates of 128 kbps and above Bursts up to 2Mbits Over-subscription of the satellite bandwidth where return on operational expenditure is maximised. Satellite bandwidth being the highest recurring cost STAR network architecture hub and spoke configuration, any terminal to terminal communications requires a double hop through the central hub Transports Internet Protocol (IP) and respective higher layer protocols & applications
11 Agenda Why VSAT? Defining The Network Requirements Coverage Traffic & Connectivity Features Public & Private Networks Understanding The Technology VSAT Terminal & IDU Transmission Basics Satellite Network What Fits The Application?
12 VSAT Terminals m VSAT Any make or design Outdoors Dish & mount RF Indoors Satellite modem Terrestrial network interface
13 Technologies & TLA s Carriers & Services SCPC (Turbo) Frame DAMA (SCPC FDMA & TDMA) DVB-RCS, DVB-SCPC, TDMA Network Hardware Voice, security, multimedia
14 Network Architecture Options Mesh Star Hybrid
15 Star Network: Point-to-point / SCPC PBX Central Site CPE F7 F1 F8 F2 LAN F3 F9 F4 Six Remote Sites CPE LAN CPE LAN CPE LAN CPE Bandwidth on Satellite F5 F6 F10 F11 F12 CPE CPE LAN LAN LAN F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 Total Bandwidth 768 kb/s
16 Star Network: Frame Six Remote Sites SDM-9350 F2 SDM-9350 LAN F3 LAN Central Site SDM-9350 LAN SDM-9380 F4 PBX F1 Mod/Demod(1-2) Demod (3-6) SDM-9350 LAN F5 SDM-9350 LAN Bandwidth on Satellite F6 SDM-9350 LAN F7 F1 192kb/s F2 F3 F4 F5 F6 F7 LAN Total Bandwidth 576 kb/s
17 DAMA A Switch in the Sky
18 Dynamic Bandwidth Allocation 1024Kbps REMOTE 1 REMOTE 6 REMOTE 2 REMOTE Kbps REMOTE 3 REMOTE 4
19 Dynamic Bandwidth Allocation REMOTE 1 REMOTE 6 REMOTE 2 REMOTE 5 REMOTE 3 REMOTE 4
20 Dynamic Bandwidth Allocation REMOTE 1 REMOTE 6 512Kbps 1024Kbps REMOTE 5 512Kbps REMOTE 2 REMOTE 3 REMOTE 4
21 Agenda Why VSAT? Defining The Network Requirements Coverage Traffic & Connectivity Features Public & Private Networks Understanding The Technology VSAT Terminal & IDU Transmission Basics Satellite Network What Fits The Application?
22 Decision Process Budget Capex vs. Opex Client requirements Locations Connectivity needs Volume Skill sets! Trade-Offs Duration
23 AfriConnect Recommended Standard Solutions Ku-band & C-band solutions m antennas 32Kbps - 2Mbps Choice of service depends on application and location SatIP SatWidth
24 Broadband IP- VSAT Technology Network Operator Teleport Remote Client Site VoIP Phone Router Broadband VSAT Hub LAN Switch Internet/ Backbone
25 Downstream Data Flow C or Ku Band Frequencies 11.5 Mbps TDM Shared Downstream with Turbo Coding Customer A LAN Data Data From Source Hub Customer B LAN Data
26 Upstream Data Flow To Destination C or Ku Band Frequencies Configurable TDMA upstream (5.5Mbps) with Turbo coding Customer A LAN Data Hub Customer B LAN Data
27 Option 1 - SatIP m Ku-band VSAT PAS 10 satellite DVB / TDMA SatIP-POD18 IDU provides an always-on connection for instant access to the Internet and corporate Intranet embedded TCP/IP acceleration 10BaseT Ethernet connection suitable for one PC, or connected to a router or hub or switch on a LAN Each PC on the network must have anti-virus and firewall software installed to prevent problems
28 Options 2 - SatWidth m C-band VSAT AB3 satellite TDMA / TDMA Turbo Product Code, TCP Acceleration, encryption 10BaseT Each PC on the network must have antivirus and firewall software installed to prevent problems
29 So, Why VSAT?! Broadband VSAT offers organisational level connectivity solutions and bandwidths! Or flexible connectivity if telecoms not centralised function! Many of the variables and pricing have now been simplified! More complex networks can be engineered! Higher bandwidths at lower cost available on demand! High level business applications can be supported
30 AfriConnect Satellite Technology Overview
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