With convergence of voice, data and video over satellite becoming more common, some organizations are encountering TCP/IP performance limitations. Typical satellite links exhibit both high latency and bit error rates (impaired links), which can be challenging for the transmission of TCP. With this connection-oriented protocol, a number of factors contribute to its performance degradation over impaired links, including:

• The time required for an acknowledgement can severely limit the ramp up in transmission rate
• Sender's small window size reduces throughput
• Delay that is interpreted as network congestion versus propagation causes reduced transmission rates
• Packet loss that is interpreted as network congestion versus corruption causes reduced transmission rates

Transparent TCP Acceleration
Comtech EF Data's PEPs were designed to combat the inherent challenges of transmitting TCP over satellite links. Available in a standard 19" rack unit or a 1/2 rack form-factors, the units provide transparent acceleration of TCP sessions, increasing throughput over satellite links while requiring minimal topology changes. The PEPs are standards-based, supporting the Space Communications Protocol Standard Transport Protocol (SCPS-TP). The units provide reliable connection-oriented, end-to-end data transfer for user applications, and can also overcome the deficiencies that exist with TCP, including slow start and congestion control. Since the PEPs interoperate with TCP/IP networks and devices, they can be seamlessly integrated into existing networks in a staged manner, avoiding the need for network-wide upgrades.

The Solution - turboIP^®-G2
The turboIP-G2 is the next generation in the line of turboIP Performance Enhancement Proxies, specifically built to meet the satellite acceleration needs of today's most advanced networks. Building on the legacy of the turboIP product line, the new turboIP-G2 combines standards-compliance, interoperability, security and management features, and Wide Area Network (WAN) optimization into a single COTS platform.

turboIP-G2 is already deployed in government and military agencies plus commercial environments around the globe. Common applications for the turboIP product line are supporting organizations utilizing satellite links for Internet backbone trunking services and organizations with large or evolving satellite bandwidth requirements for Internet traffic.

Comtech EF Data is also pleased to offer a very competitive trade-in offer for existing customers that would like to update their systems to the latest, powerful, turboIP-G2. Please see your Comtech EF Data sales associate for more information on this great offer.

Throughput (Bi-Directional)
The turboIP-G2 can be software configurable, via FAST codes, to move support from 15 Mbps up to 45 Mbps, maximum single session and/or maximum aggregate throughput rates.

Product Specifications

Advanced Technologies

• Implements Open Standards (SCPS-TP)– MIL-STD-2045-44000
• Rate Pacing or Dynamic Bandwidth (Per Connection Support)
• Intelligent Congestion Control
• VLAN and GRE Tunnel Support
• Automatic Window Scaling
• Selective Acceleration
• Black Hole Detection & Recovery
• Path Maximum Transmission Unit (MTU) Discovery
• Packet Reordering Tolerance
• Large Queue Support
• Up to 3200 simultaneous accelerated sessions with bypass of additional sessions
• Asymmetrical Route Management
• Out of line – Network Device Position Configuable
• IPv6/IPv4 Capable

Simplified, Yet Powerful, User Management

• Quick Start
• HTTP and SNMPv3/v2/v1 Network Management
• Enhanced Configuration and Management Option
• Enhanced Performance Analysis Tools

Physical Features

• Available in 1RU 19" rack form factor
• Also available in hardened 1RU 19" 1/2 width rack form factor
• Rack kit allows left or right or dual mount positions
• Fail-to-Wire
• Size, Weight, and Power considerations (SWaP)
• 10/100/1000 Mbps Auto Sensing, Auto Crossover Capabilities

Product Specifications

The charts below illustrate the advantage of using turboIP-G2 to accelerate TCP performance.

Results charted are for a single session file transfer over a 10 Mbps full duplex link on a Microsoft Windows 2000™ Professional FTP server and client with factory default settings for TCP.