March 13, 2012

At Satellite 2012, STM announces DVB-RCS2 Hubs & VSATs for general availability.

Washington, D.C., March 13, 2012 – STM Group, Inc. has announced today, at the Satellite 2012 tradeshow in Washington D.C., that it is now shipping its SatLink® family of VSATs and Hubs with support for the new DVB-RCS2 standard for general availability.  STM is the first company in the industry to support the “RCS2” standard. In June of 2011, STM also lead the way with the first public demonstration of the major high-performance features in the new RCS2 standard, just a few months after approval by the DVB organization.

DVB-RCS2 provides for higher order modulation and coding along with many other elements contributing to much higher throughput, better bandwidth efficiency, and improved link availability relative to legacy VSAT systems.  Modulation and coding from QPSK 1/3 up to 16QAM 5/6 is provided for TDMA burst mode carriers with Adaptive Coding and Modulation (ACM) controlled per burst for each VSAT.  The other elements include a 16-state Turbo Code FEC and highly efficient Return Link Encapsulation (RLE) for IP packets imposing about 2% overhead.   

In the SatLink implementation, TDMA carriers can be operated in large, dynamically shared pools at various symbol rates up to 8 Msps with carrier spacing of only 12%.  VSATs use very fast frequency hopping, under 5 microseconds, across carriers, providing a huge dynamic range for handling diverse conditions and/or VSAT sizes within a single beam.   Return Link carriers with over 22 Mbps of IP throughput are possible in TDMA mode using short bursts of 540 symbols, providing maximum burst filling efficiency.

Operators of both large and small networks can realize huge benefits with SatLink’s DVB-RCS implementation. In small networks with few VSATs and one or two TDMA carriers, the “ACM per burst” feature makes it so operators do not have to choose the “best” modulation and coding to use; it is determined automatically per VSAT with each burst.  Large networks benefit in this same way, plus they get additional multiplexing efficiency gains by using larger pools of TDMA bandwidth, dynamically sharing up to 50 Mbps across many 1000s of VSATs, if desired. Total efficiency gains with RCS2 can be as large as 300 percent on TDMA carriers compared to legacy VSAT networks.  

RCS2 is available on the current generation of SatLink VSAT IDU and Hub products, including the SatLink 2000 IDU, SatLink 2900 IDU, SatLink 2900 Mobile/Maritime IDU and the SatLink 8560 FLS and RLS products. STM also continues to support and enhance features of its proven DVB-RCS implementation on these and earlier generation SatLink platforms. 

STM has a special live demonstration of SatLink technology at Satellite 2012 in stand #367, with a real-time connection to the SatLink WebNMS.


About STM Group (

STM provides complete IP based satellite network systems, under the SatLink brand, that follow the DVB-RCS & RCS2 standards and operate in all satellite bands. STM products and services are in use globally and serve customers in diverse industries for a variety of IP based applications. Based in Irvine, California, STM has offices in several worldwide locations for product development, network services, and technical support.


Brian Cunningham 
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