Products

VSATPlus II
FlexiDAMA
VSATPlus 3

The VSATPlus II provides a full mesh, hubless network with no single point of failure and offers the greatest ease of network configuration and expansion. It supports the most demanding network applications including high quality voice, low and high-speed data, video conferencing and fax - all in a single low-cost, integrated platform. Combined with the unique direct E1 telephony and Frame Relay interface, the VSATPlus II is the most cost-effective satellite communications solution for multi-line and/or multi-application networks in the world.

The VSATPlus II satellite communications terminal offers multiservice capability, using Time Division Multiple Access (TDMA) with Frequency Hopping (FHOP) technology. The system offers hubless, full mesh network connectivity with features that provide better price/performance levels.

Highlights:

Voice, data, video and facsimile services combined in a single, low-cost platform
Hubless, full mesh Demand Assigned Multiple Access (DAMA) operation with single satellite hop
Maximum use of satellite bandwidth by combining TDMA and FHOP technology
Fractional, split, DAMA E1 and DAMA Frame Relay
PolarSat's StreamView™ Network Management System offers sophisticated network control for dynamic "Bandwidth on Demand" services
Easily installed and expandable terminals for low-cost network growth

With its ability to support voice, data, video, and facsimile, the VSATPlus II terminal is an ideal modular system. It supports a full complement of information transport applications including low and high-speed data, multichannel high-quality voice & facsimile and two-way videoconferencing - all in a single, integrated, fully digital network.

Network Management System:
The product line also includes StreamView™, a comprehensive software-based network management system (NMS). StreamView allows operators to monitor and control an entire VSATPlus II network from a single location.

Network services:
Services supported include: interactive voice, data, facsimile, videoconference, LAN interconnect, WAN service, email, high-speed imaging and backup circuits for terrestrial links.

A range of RF and antenna subsystems:
These subsystems complete the VSATPlus II product line and permits network operation on C-Band, extended C-Band, INSAT and Ku-Band satellites.

VSATPlus II architecture:

This architecture is based on a combination of TDMA and frequency hopping and has unique attributes with significant advantages over most other VSAT architectures for the markets targeted. These markets are characterized by requiring four or more voice channel equivalents at each remote site and requiring wide flexibility of network configurations and service combinations. The product is ideally suited for applications requiring or benefiting from a direct digital interface.

FlexiDAMA based SCPC DAMA VSAT networking system is capable of providing a wide variety of satellite based communications services in an extremely cost-efficient manner. FlexiDAMA systems use satellites to provide wireless connectivity between terminals geographically dispersed over a wide region. FlexiDAMA uses SCPC-DAMA (single channel per carrier - demand assigned multiple access) satellite access technology to provide full mesh circuit and packet switched connectivity with dynamic in-circuit bandwidth-on-demand to provide maximum flexibility and bandwidth efficiency. User applications serviced by FlexiDAMA systems can range from simple telephone connectivity to complex intelligent data services such as LAN/WAN and Internet access and broadcast applications like video-conferencing and tele-education.

SkyIP is a low cost FlexiDAMA terminal option for remote sites when a single IP or serial data connection is required. It integrates the satellite modem and router/bridge function to provide a very low cost unit. SkyIP units provide both SCPC DAMA and BoD to efficiently use satellite bandwidth and reduce operating costs. When a remote site needs more than a single carrier, FlexiDAMA Units (FDUs) provide multiple SCPC carriers as needed

With the FlexiDAMA, PolarSat offers customers a flexible networking solution that:

Utilizes cost-effective initial capital investment
Minimizes space segment lease costs
Reduces expenses during expansion
Shared hub station and sub-networks
The unique design of the modular FlexiDAMA architecture not only supports easy network expansion but also offers an integrated network of physically independent sub-networks with a shared hub. Each sub-network can be assigned a separate computer to support the DAMA call processing functions of that particular sub-network. Intra sub-network communication can be authorized or prohibited by the network manager at the Network Control Center. This results in a cost effective initial capital investment.
Data DAMA
The Data Channel Unit (DCU) provides DAMA operation for IP traffic based on the input buffer pointer. If there is no data in the buffer, the carrier is taken down. The carrier is reactivated after data enters the buffer or data reaches the carrier activation pointer position in the buffer. This provides an extremely efficient use of the space segment, and lowers overall operational costs.
Bandwidth on Demand (BoD)
The IP traffic interface also manages the transmission bandwidth so as to provide more bandwidth if the input buffer pointer reaches the bandwidth expansion buffer pointer, provided additional satellite bandwidth is available.

Star/Mesh Overlay

In a Star/Mesh overlay, some of the nodes operate as a Star network, and the remaining nodes operate as a Mesh network. Within the FlexiDAMA system, a remote station may be at the same time part of the Star network and part of the Mesh network. In such a station, certain services can be connected to an Data Channel Unit (DCU) that is assigned to the Star network and that transmits all its traffic to the hub station, while other interface modules and associated modems are operated as part of the Mesh network from the remotes to the regional hubs.

Multiple Satellites

The NMS supports multiple satellites as well as multiple transponders. Each transponder requires at least one FEP. The system can be configured with up to eight different satellite transponders.

Fully integrated services in a single platform The VSATPlus 3 terminal is based on TDMA with frequency hopping (FHOP). Taking advantage of both time domain and frequency domain access methods, the VSATPlus 3 allows users to support multiple services such as data, voice, and videoconferencing in one simple, integrated IP transport platform.

The single VSATPlus 3 platform integrates with IP based routing and user equipment allowing for a more reliable,flexible, and economical solution. Hubless, full mesh operation with single satellite hop. The VSATPlus 3 is based on a flexible architecture that supports various network topologies including star, full mesh, hybrid, or any combination of these.
The VSATPlus 3 architecture eliminates the need for costly central hub equipment and improves call quality by transferring information over single satellite hops. Transponder bandwidth and power requirements are greatly reduced.

PolarSat's IP support provides a powerful and cost-effective solution to corporations, governments, and service providers who need to interconnect locations via a satellite-based backbone. The Ethernet Interface supports industry-standard IP. Corporate users are provided a single transport mechanism that can carries all user traffic such as TCP/IP, UDP/IP, while providing mesh communications among all sites within the network.

Satellite bandwidth is allocated through committed information rate (CIR), excess information rate (EIR), and Quality of Service (QoS) definitions, and optimized using dynamic bandwidth allocation (BoD) techniques, thereby minimizing recurring communications network costs. This approach provides user traffic with guaranteed bandwidth and the ability to request additional bandwidth from the network. VSATPlus 3 provides the virtual LAN in the sky with the satellite bandwidth resource shared among all users.

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