Comtech EF Data CDM-750 High Speed Advanced Trunking Satellite Modem
Data rates up to 169 Mbps, L-Band or 70/140 MHz IF
CDM-750 High Speed Satellite Modem
The Comtech EF Data CDM-750 Advanced High-Speed Trunking Modem was designed to be the most efficient, highest throughput, point-to-point trunking modem available. The CDM 750 accommodates the most demanding Internet Service Provider (ISP) and telco backhaul links by offering users the most advanced combination of space segment saving capabilities while minimizing the need for unnecessary overhead. With the ability to process packets at line speed, the CDM750 will not throttle throughput due to processing limitations.
Beginning with the most efficient coding and modulation available, the CDM-750 leverages the DVB-S2 EN 302 307 LDPC/BCH standard to provide the best possible combination of coding and forward error correction ensuring that the maximum amount of satellite traffic is transported for a given signal to noise capacity.
Implementing Adaptive Coding and Modulation (ACM) operation (in packet-based applications) allows link margin to be converted to user capacity during non-faded conditions by taking advantage of the actual signal to noise ratio rather than calculated worst case signal to noise. This technology transforms link margin, implementation margin and margin for antenna pointing directly to improved throughput. By using the best encapsulation methods, the CDM-750 further increases throughput by using minimal overhead. In G.703 synchronous mode, users can implement monitor and control over the satellite with no additional overhead. When using Ethernet bridge mode, less than 1% overhead is used for encapsulation.
By using the best encapsulation methods, the CDM-750 further increases throughput by using minimal overhead. In G.703 synchronous mode, users can implement monitor and control over the satellite with no additional overhead. When using Ethernet bridge mode, less than 1% overhead is used for encapsulation.
No Loss
The optional K4 GZIP lossless compression engine performs real-time compression of Ethernet traffic and is capable of running at the full rate of the modem. Offering 52% to 59% compression rates at random packet sizes using the Calgary Corpos bitstream, K4 GZIP can greatly increase the throughput of the satellite link, or reduce required bandwidth.
Bandwidth Savings
Additionally, the CDM-750 leverages Comtech EF Data’s powerful Double Talk Carrier in Carrier Adaptive Cancellation” technology. With the ability to overlay TX and RX carriers, Carrier-in-Carrier enables the operator to establish the perfect balance between bandwidth and power, enabling the best possible use of the satellite resource and reducing operating expenses (OPEX).
These technologies alone offer enormous savings to the ISP and telco operator. When used in combination, however, the savings are astronomical.The innovative high-performance architecture of the CDM-750 allows efficient networking and transport over satellite links while supporting a wide range of applications and network topologies.
Enterprise , Broadband Interactive Services , Disaster Recovery & Emergency Communications , Enterprise , G.703 Trunking , High Speed Content Delivery