Comtech EF Data CDM-760 Ultra Advanced High-Speed Trunking Modem

CDM-760 Ultra Advanced High-Speed Trunking Modem

The Comtech CDM-760 Advanced High-Speed Trunking Modem builds on our award-winning family of high-speed, ultra efficient trunking modems. The CDM-760 further enhances our offerings to include ultra wide band symbol rates, near theoretical performance with minimal implementation loss, our proprietary DVB-S2 Efficiency Boost technology, Super Jumbo Frame (SJF) Ethernet support and many other value-added features.

The Comtech Radyne CDM-760 Advanced High-Speed Trunking Modem was designed to be the most efficient, highest throughput, point-to-point trunking modem available. The CDM-760 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.

The 760 Series Satellite Modem offers an expansive range of symbol rates (100 ksps to 150 Msps) and data rates (100 kbps to 314 Mbps). Run in a duplex setting, this is a staggering 628 Mbps or 300 Msps. Coupling these speeds with the native Super Jumbo Frame Ethernet interfaces supporting Ethernet frames from 64 Bytes to >10,000 Bytes and the CDM-760 will process Ethernet frames at a blazing (> 1.2 Million packets / second).

Expanding on the efficient DVB-S2 EN 302 307 standard, the CDM-760 again furthers spectral efficiency with its DVB-S2-EB1 (Efficiency Boost) waveforms. DVB-S2 is widely accepted as the most spectrally efficient standards-based waveforms. With our Efficiency Boost technology (DVB-S2-EB1), you can achieve a 10% – 35% increase in efficiency over the DVB-S2 standard without an increase in power or occupied bandwidth. The CDM-760 accomplishes this task by virtually doubling the number of available MODCODs, introducing three new ROF figures (5%, 10% and 15%) and minimizing implementation loss to near theoretical operation. The CDM-760 is software upgradeable to support future standards including DVB-S2 Efficiency Boost, DVB-Sx and DVB-S3.

Implementing Adaptive Coding and Modulation (ACM) operation 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.

By using the best encapsulation methods, the CDM-760 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.
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.

Additionally, the CDM-760 leverages our powerful DoubleTalk® 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-760 allows efficient networking and transport over satellite links while supporting a wide range of applications and network topologies.

Features

Symbol Rate: 0.1 to 150 Msps

Data Rate: 0.1 to 314 Mbps

DVB-S2 ETSI EN 302 307 compliant

DVB-S2-EB1 Efficiency Boost technology

DoubleTalk Carrier-in-Carrier bandwidth compression

ACM and CCM

GSE – low overhead <1% encapsulation

K4 GZIP lossless compression

Super Jumbo Frame 10,240 Byte Support

Modulation: QPSK, 8PSK, 16APSK, 32APSK

Dual IF: 70/140 MHz, L-Band and L-Band monitor

Data Interfaces

2 Gigabit 10/100/1000Base-T interfaces (standard)

1 Optical Gigabit interface (optional)

Processes > 600,000 pps simplex, 1.2M pps duplex

PIIC optional interface cards

G.703 E3/T3/STS-1 (34.368, 44.736, 51.84 Mbps)

STM-1 Copper SDH (155.52 Mbps)

OC-3 SONET single mode or multi-mode 1300 nm (155.52 Mbps)

Multistream capable (Multi-Interface mux)

Management: HTTP, SNMP, Telnet, RS-232/485

In-band (over satellite) M&C control

1:1 and 1:N redundancy switching available