Comtech EF Data CDM-625A Advanced Next Generation Satellite Modem

CDM-625A Next Generation Advanced Satellite Modem

The Comtech EF Data CDM-625A features the latest highly advanced bandwidth efficient technologies that deliver massive spectral savings which reduce OPEX.  With support for the revolutionary DoubleTalk Carrier-in-Carrier bandwidth compression, VersaFEC Forward Error Correction (FEC), additional rolloffs and advanced packet processing, the CDM-625A provides exceptionally reliable spectral purity and satellite space segment cost reductions under all conditions. These combinations of advanced technologies enable multi-dimensional optimization, allowing satellite communications users to: 

 Minimize operating expenses (OPEX)

 Maximize throughput without using additional transponder resources

 Maximize availability (margin) without using additional transponder resources

 Minimize capital expenses (CAPEX) by allowing a smaller BUC/amplifier and/or antenna

 Or, a combination to meet specific business needs

The modems are available with 70/140 MHz or L-Band IF and EIA-530/-422, V.35, sync EIA-232 and G.703 T1/E1 data interfaces. The CDM-625A includes a high-performance packet processor for IP-centric applications.

Key Features

 DoubleTalk Carrier-in-Carrier bandwidth compression

 Carrier-in-Carrier Automatic Power Control

 VersaFEC-2 High Performance LDPC with Adaptive Coding and Modulation (ACM), Short Block and Long Block

 VersaFEC FEC with Adaptive Coding and Modulation (ACM)

 5%, 10%, 15%, 20%, 25% and 35% Filter Rolloff

 Packet Processor with header compression, payload compression, advanced Quality of Service (QoS) and Managed Switch Mode with VLAN support

 Integrated 4-port managed Ethernet switch with VLAN and QoS

 Jumbo frame support

 Dual Band Capability: 70/140 MHz and extended L-Band (950 – 2250 MHz) in same unit 

 Data Rate: 18 kbps to 25 Mbps

 Symbol Rate: 18 ksps to 12.5 Msps

 Modulation: BPSK, QPSK/OQPSK, 8PSK/8-QAM/8-ARY, 16-QAM/16-ARY, 32-ARY

 FEC: Viterbi, Sequential, Concatenated Reed Solomon, TCM, Turbo Product Code (TPC) (IESS-315 Compliant), LDPC Code, VersaFEC (low-latency LDPC) and VersaFEC2 (high performance LDPC)

Doubletalk Carrier-in-Carrier