Comtech CDM-625-EN Advanced Satellite Modem

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Product Information

  • Type: SCPC
  • Frequency: 70/140mhz L
  • Brand: Comtech EF Data
  • SKU: CMT113

Tech Specifications

Datasheet PDF


The CDM-625-EN Advanced Satellite Modem builds on Comtech EF Data’s legacy of providing the most efficient satellite modems for IP-centric applications that require data encryption. It is the first modem to combine advanced Forward Error Correction (FEC) such as VersaFEC and Low Density Parity Check (LDPC) codes with the revolutionary DoubleTalk Carrier-in-Carrier bandwidth compression, allowing for maximum savings under all conditions.


  • DoubleTalk Carrier-in-Carrier bandwidth compression
  • Carrier-in-Carrier Automatic Power Control
  • Adaptive Coding and Modulation (ACM)
  • Packet Processor with header compression, payload compression, advanced Quality of Service (QoS) and Managed Switch Mode
  • AES Data Encryption for IP traffic (Packet Processor)
  • Dual Band Capability: 70/140 MHz and L-Band in same unit, extended L-Band receive
  • Data Rate: 18 kbps to 25 Mbps
  • Symbol Rate: 18 ksps to 12.5 Msps
  • Modulation: BPSK, QPSK/OQPSK, 8PSK/8-QAM, 16-QAM
  • FEC: Viterbi, Sequential, Concatenated Reed Solomon, TCM, Turbo Product Code (TPC) (IESS-315 Compliant), LDPC Code and VersaFEC (low-latency LDPC)
  • Widest Range of Data Interfaces: 4-port 10/100Base-T Ethernet, EIA-422/530, V.35, G.703 T1, G.703 E1, G.703 T2, G.703 E2, Quad G.703 E1, ASI, LVDS, HSSI
  • 4-port Managed Ethernet Switch with VLAN and QoS
  • Sub Mux to multiplex IP/Ethernet traffic with serial or G.703 traffic
  • Drop & Insert for T1/E1
  • Enhanced D&I++ for Single T1/E1 & Quad E1
  • Management: 10/100Base-T Ethernet with SNMP, Distant End SNMP Proxy, HTTP, Telnet and EIA-232/EIA-485
  • Carrier ID using MetaCarrier® Technology
  • Embedded Distant-end Monitor and Control (EDMAC)
  • Automatic Uplink Power Control (AUPC)
  • Standard high-stability internal reference (± 6 x 10-8)
  • 5-tap Adaptive Equalizer
  • L-Band TX: 10 MHz reference for BUC, FSK communications and optional BUC power supply
  • L-Band: Advanced FSK for LPOD M&C
  • L-Band RX: 10 MHz reference and LNB power supply
  • Redundancy switches available

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