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Advanced VSAT Solutions

The Advanced VSAT Solutions is a portfolio of high-performance, satellite-based communication solutions that facilitate premium services for the enterprise – energy, mining, maritime, airline and corporate networks. Representing the next generation in satellite networking equipment, the Advanced VSAT comprises a bundle of products and advanced technologies developed by the various engineering groups within Comtech EF Data and our subsidiary, Memotec.

We are recognized in the industry for our market-leading modems and bits/Hz performance. The Advanced VSAT takes performance to the next level. It puts the intelligence in the horsepower machine that is a Comtech EF Data modem. Is it TDMA? Is it SCPC? It is dynamic bandwidth allocation.



Throughput + Service Quality


Today, end users require astounding levels of additional throughput to support mission-critical applications. The majority of this increased demand originates in the inbound direction given the valuable multimedia content that needs to be transmitted from remote sites back to central locations. It is key for satellite networking solutions to be able to handle these increasing data rates while having headroom for future growth.

Advanced VSAT is focused on throughput and service quality. It has the processing power needed to support your pps and Mbps transmission requirements for high data rate applications, high definition video and voice. It provides the service quality your users demand with low jitter and low latency so you can meet those stringent SLAs. It is also a fully managed system with the intelligence to enable dynamic allocation of bandwidth when and where it is needed.









Do you want a satellite platform that only allows you to provide contended service for the next 1-3 years? Or, do you want to provide premium services based on the Advanced VSAT platform that will enable you to expand your business and meet your users’ requirements?

Advanced VSAT is a fully managed hub-spoke networking system that consists of hub and remote terminal components.



  • Shared DVB-S2 outbound transmission with ACM/VCM
  • VersaFEC® return channel reception with ACM and bandwidth on-demand
  • High-performance packet processing and optimization including multi-level Quality of Service (QoS), header compression & lossless payload compression
  • Integrated management system platform
  • WAN optimization


Remote Terminals

  • DVB-S2 outbound reception
  • Return channel transmission based on VersaFEC with ACM and Dynamic Single Carrier per Channel (dSCPC) bandwidth on-demand
  • High-performance packet processing and optimization including QoS, header compression and lossless payload compression
  • WAN optimization


Multi-Layer Optimization

Satellite bandwidth is the largest operating expense for satellite networks. Utilizing bandwidth and power efficiencies can directly impact service provider profitability and SLAs. Multi-layer optimization is crucial for sustainable operations.

Multi-level optimization and sharing are at the core of our Advanced VSAT Solutions. Our system provides the highest spectral efficiency in its class by optimizing smart bits and unintelligent Hz. Essentially, it’s a process of more intelligently processing data, driving the economics to the right point while having the right horsepower to support it. Examples of the Advanced VSAT functionality that facilitate efficient transport are:

Functionality Benefit
  • Enables dynamic allocation – remote terminals can share one or more bandwidth / power pools for return links
DVB-S2 and VersaFEC with ACM/VCM
  • Provides maximum spectral efficiency with minimal latency
  • Converts available link margin for maximum throughput
Header Compression & Lossless Payload Compression
  • Reduces required bandwidth and enables the most efficient transport for IP datagrams
Fully Integrated & Multi-Level QoS
  • Ensures the highest service quality with minimal jitter & latency
  • Enables real-time & other low priority traffic to seamlessly co-exist on the same link without impacting voice quality or mission-critical data delivery
Low Overhead Streamline Encapsulation & Enhanced GSE
  • Facilitates link layer efficiency
Global Roaming
  • Allows remote terminals on-board mobile platforms to seamlessly transition between satellite beams or hub coverage with minimal service interruption
WAN Optimization
  • Reduces amount of data that traverses the link and gets data to users faster

The Advanced VSAT platform will allow you to dynamically assign bandwidth network-wide to meet the ever-increasing demands of your business. It has the intelligence and underlying resiliency to meet stringent jitter and latency requirements of your most crucial applications. It provides the highest bandwidth efficiencies and processing power to support your most bandwidth-rich applications. It can also remotely modify bandwidth allocations as requirements change tomorrow…without requiring costly upgrades or site visits. With the addition of our premium service, ESS Prime, we also provide 24×7 engineering support and other technical services to support your integrated network infrastructure.

More Information

In a world of “me-too” offerings, differentiation comes from challenging convention and partnering with a satellite platform provider that enables you to defy the norm. Contact us today – We’ll help you carve out service differentiation based on the right mix of platform and support…before, during and after the network implementation. Advanced VSAT Solutions Overview Video
Watch a video overview of Advanced VSAT Solutions


Products with Encryption

NetVue Integrated Management System (NMS)

A state-of-the-art NMS is critical to operating a shared multi-user platform in a cost-effective manner. NetVue is our unified network management platform designed to provide overall network visibility on a single screen, improve resource utilization, improve service quality and Quality of Experience (QoE) to increase customer satisfaction, reduce downtime thereby maximizing service availability. NetVue offers advanced applications for automation, scheduling, monitoring, reporting and spectrum analysis.


Multi-Layer Optimization

The focal point of the Advanced VSAT is our multi-level optimization with the highest spectral efficiency in its class:

  • DVB-S2 and VersaFEC with ACM/VCM enable the most efficient physical layer without compromising latency
  • Low overhead Streamline Encapsulation (SLE) and Enhanced GSE enable the most efficient link layer
  • Header compression and lossless payload compression enable the most efficient transport for IP datagrams
  • RAN optimization minimizes the bandwidth required for mobile backhaul
  • WAN optimization provides TCP connection management, TCP optimization, image reduction and smoothing, caching, bandwidth pooling, and other capabilities for significant bandwidth savings
  • Advanced multi-level QoS ensure the highest service quality with minimal jitter and latency for real-time traffic, priority treatment of mission critical applications while maximizing bandwidth efficiency


Dynamic Bandwidth Management (dSCPC)

The dSCPC capability enables dynamic allocation and sharing of bandwidth among users. Automatic switching modes include load switching and ToS switching. Load switching is ideal for applications, such as ftp and web browsing that can ramp up or down based on available bandwidth. ToS switching is ideal for applications that require fixed bandwidth, such as video conferencing.


Advanced Forward Error Correction (FEC)

The Advanced VSAT incorporates the latest forward error correction technologies:

  • DVB-S2 for the high-speed shared outbound traffic; delivers unmatched bandwidth efficiency for high-speed traffic.
  • VersaFEC (low-latency LDPC) for return traffic; a patented system of high-performance, short-block, low-latency LDPC codes designed to support latency-sensitive applications, such as mobile backhaul over satellite. VersaFEC provides excellent coding gain with the lowest possible latency. VersaFEC’s coding performance is similar to that of DVB-S2 (short block) with up to 95% lower latency.

The combination of DVB-S2 for the outbound and VersaFEC for the return provides maximum spectral efficiency with minimal latency.


Adaptive Coding & Modulation (ACM)

Satellite users have traditionally relied on worst-case link margin to overcome rain fade and other impairments, which leads to significant inefficiencies. ACM converts the available link margin into increased throughput – a gain of 100% or more is possible. With the ability to maximize throughput under all conditions – rain fade, inclined orbit satellite operation, interference and other impairments – ACM allows each remote to achieve maximum throughput thereby maximizing network efficiency and availability. ACM operation is integrated with advanced QoS and other optimization technologies to maintain desired service levels.


RAN Optimization

RAN Optimization significantly reduces the satellite bandwidth required for mobile backhaul. The Advanced VSAT’s RAN optimization capabilities allow users to select the level of RAN optimization to achieve the desired link quality and bandwidth savings, providing ultimate control. And, the pre-emptive bandwidth management maintains superior voice and service quality even under WAN congestion conditions.


High-Performance Packet Processing

For efficient IP networking and transport over satellite, the product features high-performance packet processing capability with very low overhead encapsulation, header compression, lossless payload compression and multi-level QoS that is fully integrated with ACM and Dynamic SCPC.

  • Header Compression
  • Lossless Payload Compression
  • Low Overhead Encapsulation
  • Multi-level Quality of Service (QoS)

Multi-Service Connectivity via Advanced VSAT Solutions
Multi-Service Connectivity via Advanced VSAT Solutions


Seamless Layer 2 or Layer 3 Operation

The Bridge Point-to-Multipoint (BPM) capability enables true layer 2 operation so that an Advanced VSAT network operates like an Ethernet switch in the sky with MAC learning, VLAN trunking and VLAN access mode while benefitting from:

  • Multi-level QoS, allowing classification by VLAN ID
  • Header compression including Layer 2, Layer 3 and Layer 4 headers
  • Lossless payload compression
  • Bi-directional Adaptive Coding & Modulation
  • Dynamic SCPC bandwidth on-demand

Ethernet frames containing higher layer protocols including VLAN, MPLS, IPv4/IPv6, UDP, TCP, RTP, OSPF and BGP, seamlessly flow through an Advanced VSAT network just like any Ethernet switch, greatly simplifying the network design, deployment and operation and enabling seamless integration with existing IT infrastructure. BPM mode also allows seamless transport of MPLS over Ethernet. With ever-increasing transmission speeds and usage of VLANs and MPLS, the need for larger and larger Ethernet frames for improved efficiency continues to grow. Advanced VSAT BPM mode supports jumbo Ethernet frames up to 2018 bytes.


Global Roaming

Advanced VSAT supports global roaming in conjunction with the Vipersat Management System and Roaming Oceanic Satellite Server (ROSS). This allows a remote satellite terminal on-board an oceanic vessel to seamlessly transition between satellite beams or hub coverage with minimal service interruption. ROSS functions as the onboad mobility controller – interfacing to the Antenna Control Unit (ACU), maintaining satellite footprint maps, shoreline contour vector maps and exclusion zones, and initiating beam switching and handoff as the vessel moves through satellite footprints. The ROAM protocol offers a common management interface for the ROSS and the ACU by providing a common set of commands, information, interfaces and status queries.


Seamless E1 and IP/Ethernet Operationn

The Advanced VSAT enables simultaneous E1 and IP/Ethernet operation in a hub-spoke topology, while supporting advanced capabilities including RAN optimization, header compression, lossless payload compression, QoS and ACM. In addition to supporting multiservice networks, this allows for seamless migration from an E1 RAN to an all IP RAN.


WAN Optimization and Application Acceleration

WAN optimization and application acceleration provide TCP connection management, TCP optimization, image reduction and smoothing, caching, bandwidth pooling, and other capabilities. In addition to a significant improvement in user experience, they can also reduce bandwidth by 20-70% for web traffic.



The Advanced VSAT provides a highly scalable and cost-effective solution to meet the needs of a diverse user community. A network can start with a few sites and expand to hundreds of sites. The bandwidth can also scale as needed – the outbound can scale from as low as 1 Mbps to as high as 160 Mbps. The return can scale from as low as 16 kbps to as high as 15.35 Mbps.


Key Specifications

Outbound (Hub to Remote) Return (Remote to Hub)
Data Rate 1 – 160 Mbps 16 kbps – 15.35 Mbps
Symbol Rate 1 – 62 Msps (QPSK, 8-PSK)
1 – 47 Msps (16APSK)
1 – 37 Msps (32APSK)
16 ksps – 4.5 Msps
Modulation & Code Rates QPSK
1/4, 1/3, 2/5, 1/2, 3/5, 2/3, 3/4, 4/5, 5/6, 8/9, 9/10
3/5, 2/3, 3/4, 5/6, 8/9, 9/10
2/3, 3/4, 4/5, 5/6, 8/9, 9/10
3/4, 4/5, 5/6, 8/9, 9/10
0.533, 0.631, 0.706, 0.803
0.642, 0.711, 0.780
0.731, 0.780, 0.829, 0.853
Rolloff 20%, 25% and 35% 20%, 25% and 35%

Advanced VSAT Solutions Application images

Typical Users

  • Mobile Operators
  • Telecom Operators
  • Offshore & Maritime
  • Enterprise
  • Internet Service Providers (ISPs)

Common Applications

  • Mobile Backhaul
  • IP Trunking & Backhaul
  • Maritime and offshore connectivity
  • Corporate networks
  • Emergency & disaster recovery


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