Comtech CDM-425 Advanced Next Generation Satellite Modem
Carrier ID using MetaCarrier Technology, Automatic Uplink Power Control (AUPC), Engineering Service Channel (ESC/ESC++)
CDM-425 Next Generation Advanced Satellite Modem
The Comtech CDM-425 Ultra Advanced Satellite Modem offers the most advanced, popular and powerful features of the CDM-625A, with a smaller footprint and less power. Its Forward Error Correction options comprise 18 VersaFEC ModCods and 74 VersaFEC-2 ModCods, permitting the user to optimize for latency and coding gain for any link budget. It includes DoubleTalk Carrier-in-Carrier bandwidth compression, additional TX rolloffs and sophisticated packet processing capabilities. This combination of advanced technologies enables 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
This modem is 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-425 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 – similar performance to DVB-S2X with significantly lower latency.
VersaFEC FEC with Adaptive Coding and Modulation (ACM), both standard and Ultra-Low Latency (ULL)
Transmit Filter Rolloff
Optional 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, 8-QAM/8-ARY, 16-QAM/16- ARY, 32-ARY
FEC: VersaFEC (low-latency LDPC) and VersaFEC-2 (high performance LDPC)
Doubletalk Carrier-in-Carrier
Mobile Backhaul
G.703 Trunking
IP Trunking
Offshore & Maritime Communications
Enterprise
Communications on-the-Move
Satellite News Gathering