| Air Interface—Downstream |
DVB-S or DVB-S2, CCM/VCM/ACM, IP over MPEG |
| Modulation |
QPSK, 8PSK, 16APSK |
| Information Rates |
Up to 80 Mbps or even higher (as available from DVB-S and DVB-S2 downstream vendors) |
| Air Interface—Upstream |
DVB-RCS, IP over ATM or MPEG |
| Multiple Access Method |
MF-TDMA |
| Modulation |
QPSK, 8PSK optional |
| Max Burst Info rates |
64 kbps—6 Mbps |
| Coding |
RS/Convolutional or LDPC on the downstream; Turbo on the upstream |
| MAC Layer—Upstream |
|
| Protocol |
CF-DAMA (Combined Free & Demand-Assigned Multiple Access) |
| QoS—Capacity Requesting |
Reserved Capacity (CRA), Volume Based Dynamic Capacity (VBDC), Rate Based Dynamic Capacity (RBDC), Free Capacity (FC) |
Bandwidth on Demand (Return Link)
|
0-6 Mbps every 26.5 ms, framed in 1, 2 or 4 ATM or 1 MPEG packet, with in-band and out-of-band capacity requesting mechanisms |
| Interfaces |
|
| Network |
IP over Ethernet (10/100/1000BaseT) |
| NMS |
NetManager™, web interface control, remote terminal management, VNO 3rd Party Equipment—Standard SNMP interfaces available |
| Tx & Rx |
Frequency Independent (can use any combination of C, Ku, Ka, etc.)
Can interface with any frequency at L-band IF frequency |
| RLSS Expansion Options |
|
| Additional Return Link Carriers and Rates |
Demodulator is programmable with multiple carriers, at rates from 64 kbps—6 Mbps up to a maximum total of 5-24 Mbps per card.
Each additional demodulator can provide up to 24Mbps of throughput
|
| Additional Terminals |
Each additional processor can support hundreds to thousands of terminals |
| Units/Racks |
Non-redundant and redundant Hub solutions available in rack standard configurations. The RLSS is assembled in standard 19” telecom racks. All RLSS functions are housed in the same unit. Scaling involves adding additional cards, and then additional units as required to expand terminal and throughput capacity. |
| Options |
|
| Fade Countermeasure |
VCM/ACM, ClearSky™ |
| Redundancy |
Non-Redundant, Protected, Hitless Hot Redundant |
| PEP |
TCP/HTTP Acceleration |
| Multiple Satellites/Beams |
Designed to support multiple satellites in mix of frequencies |
| Hub Networks |
Main Hub, Dependent Remote Hubs, Autonomous Remote Hubs |
| Diversity |
Hitless Diversity Switching (from diversity antenna/hub) |
| Scalability |
Pay-as-You-Grow™ |
| Higher Layer Protocol Options |
VoIP, Virtual Telephony™, Advanced QoS, IPSec/VPN, VLAN, Data Compression, Multicast
hits for external ref. |
| Other |
DVB-S forward link configurable down to 1 Msps, Mesh Overlay |
| |
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DVB-RCS VSAT Systems
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