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Modern satellite communication networks demand more than basic connectivity. Organizations require efficient bandwidth utilization, low latency, advanced Quality of Service (QoS), secure IP transport, and highly reliable operation for mission-critical applications. Whether supporting enterprise VSAT deployments, government communications, cellular backhaul, defense operations, broadcasters, or Internet Service Providers (ISPs), today’s satellite modem must deliver exceptional performance while remaining flexible enough to adapt to evolving network requirements.
The Comtech CDM-570/L-IP Satellite Modem is one of the industry’s most trusted and feature-rich satellite modems, designed specifically for professional IP networking over satellite. Built upon Comtech EF Data’s proven modem architecture, the CDM-570/L-IP integrates advanced modulation schemes, Turbo Product Coding (TPC), sophisticated IP optimization technologies, and optional Vipersat® bandwidth management capabilities to maximize satellite efficiency while maintaining outstanding reliability.
Supporting a wide range of interfaces, flexible modulation and Forward Error Correction (FEC) options, integrated IP routing capabilities, header and payload compression, Quality of Service (QoS), and advanced network management, the CDM-570/L-IP is suitable for a broad range of satellite communication applications. According to the product documentation, the modem supports data rates from 2.4 kbps up to 9.98 Mbps, multiple modulation formats including BPSK, QPSK, OQPSK, 8PSK, 8-QAM, and 16-QAM, integrated Ethernet connectivity, optional G.703 interfaces, and extensive IP optimization features.
Available from VSATplus, the Comtech CDM-570/L-IP provides organizations with a reliable, scalable, and highly configurable modem solution backed by expert technical consultation and worldwide delivery.
The CDM-570/L-IP is a professional satellite modem designed for SCPC and IP-over-satellite applications. It is available in two hardware versions:
| Model | RF Interface |
|---|---|
| CDM-570 / CDM-570-IP | 70/140 MHz IF |
| CDM-570L / CDM-570L-IP | L-Band (950–2000 MHz) |
The “IP” variants include an integrated IP module that enables efficient satellite networking with advanced compression, routing, and QoS capabilities.
The Comtech CDM-570/L-IP offers a comprehensive set of features designed to improve satellite network performance:
These capabilities make the modem suitable for everything from traditional point-to-point links to sophisticated bandwidth-on-demand satellite networks.
One of the modem’s strengths is its ability to operate across a wide range of data rates.
| Specification | Value |
|---|---|
| Data Rate Range | 2.4 kbps – 9.98 Mbps |
| Resolution | 1 bps |
| TX/RX Rates | Independently Configurable |
This flexibility enables network designers to optimize bandwidth for applications ranging from low-speed telemetry to high-speed enterprise communications.
The CDM-570/L-IP supports a broad selection of modulation schemes to maximize spectral efficiency.
| Supported Modulations |
|---|
| BPSK |
| QPSK |
| OQPSK |
| 8PSK |
| 8-QAM |
| 16-QAM |
By supporting multiple modulation formats, operators can balance throughput and link robustness according to satellite conditions.
Reliable satellite communication depends on powerful error correction.
The modem supports:
| FEC Technology |
|---|
| Viterbi |
| Reed-Solomon |
| Turbo Product Coding (TPC) |
| Trellis Coded Modulation (TCM) |
| Uncoded Modes |
TPC provides excellent coding gain, allowing operators to reduce required satellite bandwidth while maintaining reliable communication.
The optional IP module transforms the CDM-570/L-IP into a powerful IP networking platform.
According to Comtech, the IP module supports efficient IP transport over satellite with advanced networking capabilities.
Voice applications often suffer from protocol overhead.
The modem’s Header Compression feature reduces this overhead significantly.
According to the datasheet:
For example, a G.729 VoIP call requiring 32 kbps can be reduced to approximately 10.8 kbps over the satellite link.
Payload compression further improves bandwidth utilization.
| Feature | Benefit |
|---|---|
| Payload Compression | Up to 40% bandwidth reduction |
This enables operators to maximize available satellite capacity and lower operational costs.
The modem supports sophisticated QoS mechanisms for prioritizing traffic.
Supported modes include:
| QoS Mode | Description |
|---|---|
| DiffServ | Industry-standard QoS |
| Max/Priority | Eight traffic priority levels |
| Min/Max | CIR with burst capability |
QoS helps ensure that latency-sensitive applications such as VoIP, video conferencing, and mission-critical traffic receive preferential treatment.
Mobile network operators often require precise synchronization between remote base stations.
The CDM-570/L-IP includes an optional G.703 Clock Extension, which propagates a high-stability timing reference from the hub to remote sites without consuming additional satellite bandwidth.
This eliminates the need for separate GPS-based timing equipment in many deployments.
One of the modem’s most powerful capabilities is optional integration with the Vipersat Management System (VMS).
VMS enables:
The modem can automatically transition from shared STDMA channels to dedicated SCPC links when traffic demands increase, reducing latency and improving network efficiency.
The CDM-570/L-IP supports a comprehensive range of interfaces.
| Interface | Availability |
|---|---|
| 10/100 Ethernet | Optional |
| V.35 | Yes |
| EIA-422 / EIA-530 | Yes |
| EIA-232 | Yes |
| G.703 T1 | Optional |
| G.703 E1 | Optional |
This wide interface support enables integration with both legacy and modern communications equipment.
| Model | Frequency |
|---|---|
| CDM-570 | 50–90 or 100–180 MHz |
| CDM-570L | 950–2000 MHz |
Supported frequencies:
The L-Band versions include integrated support for outdoor RF equipment.
| Option | Output |
|---|---|
| 24V | Up to 100W |
| 48V | Up to 180W |
This simplifies VSAT installations by reducing external power requirements.
The modem includes comprehensive management capabilities.
Supported methods include:
Additional features include:
| Parameter | Specification |
|---|---|
| Operating Temperature | 0°C to +50°C |
| Storage Temperature | -25°C to +85°C |
| Model | Typical Power |
|---|---|
| CDM-570 | 29 W |
| CDM-570-IP | 37 W |
| CDM-570L | 29 W |
| CDM-570L-IP | 37 W |
Power supply options include:
| Parameter | Specification |
|---|---|
| Rack Height | 1RU |
| Width | 19 inches |
| Depth | 12–16 inches (model dependent) |
| Weight | 2.7–7.2 kg (depending on model and BUC power supply) |
The CDM-570/L-IP is ideal for:
VSATplus is a trusted global supplier of professional satellite communication equipment, serving enterprise, government, maritime, defense, and telecom customers.
When purchasing the Comtech CDM-570/L-IP Satellite Modem from VSATplus, customers benefit from:
Whether you’re building a new VSAT network, upgrading an existing satellite infrastructure, or deploying IP-over-satellite services, VSATplus can help you select and integrate the right modem for your application.
The Comtech CDM-570/L-IP Satellite Modem remains a highly capable solution for organizations seeking efficient, reliable, and feature-rich satellite communications. With support for advanced modulation, Turbo Product Coding, IP optimization, QoS, Vipersat bandwidth management, G.703 clock extension, and comprehensive network management, it provides the flexibility and performance required for modern satellite networks.
Available now through VSATplus, the CDM-570/L-IP delivers dependable connectivity and advanced networking capabilities for enterprise, government, telecom, maritime, and mission-critical applications worldwide.
