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The ST Engineering iDirect MDM3315 Satellite Modem is a powerful and highly flexible next-generation VSAT modem designed to support a wide range of satellite networks including enterprise connectivity, cellular backhaul, maritime communications, broadcast distribution, and government networks.
Built to operate on both Dialog and Velocity satellite platforms, the MDM3315 offers exceptional flexibility by supporting multiple return technologies such as ATDMA, MF-TDMA, SCPC, and Mx-DMA. This multi-waveform capability allows operators to design highly efficient satellite networks that adapt to changing bandwidth requirements while maintaining optimal spectral efficiency.
At VSATplus, we supply the MDM3315 Satellite Modem with full technical consultation, configuration support, and global delivery. Customers looking to deploy high-capacity satellite broadband networks can order this modem directly from VSATplus to build scalable and reliable VSAT infrastructures.
Modern satellite networks require high throughput, advanced waveform support, and the ability to integrate seamlessly with both fixed and mobility environments. The MDM3315 modem addresses these requirements with its high-speed architecture and flexible waveform support.
The modem is engineered to operate efficiently across a wide variety of networks and supports high throughput rates of up to 150 Mbps downstream and 70 Mbps upstream, enabling service providers to deliver reliable broadband connectivity for demanding applications.
One of the most important capabilities of the MDM3315 is its wideband forward channel support up to 500 Msps, which makes it suitable for use with modern HTS (High Throughput Satellite) and VHTS systems. This capability allows operators to deploy high-capacity networks that maximize satellite spectrum utilization.
The modem can also operate seamlessly within mixed networks alongside other iDirect terminals, allowing network operators to scale deployments gradually without requiring large infrastructure changes.
The MDM3315 supports both major satellite networking platforms used by iDirect systems:
The Dialog platform enables operators to deploy advanced satellite services using multiple access technologies.
Supported waveforms include:
These technologies allow the modem to dynamically allocate bandwidth depending on network conditions and traffic demands.
On the Velocity platform, the modem supports:
This architecture allows efficient bandwidth sharing across large numbers of terminals while maintaining high service quality.
By supporting multiple platforms and waveforms, the MDM3315 provides unmatched network design flexibility for satellite operators.
The modem supports advanced forward link modulation including:
DVB-S2X provides higher spectral efficiency and improved throughput compared to traditional DVB-S2 networks.
The forward channel can operate at symbol rates up to 500 Msps, enabling extremely high capacity satellite links.
The modem supports several return channel technologies that allow operators to optimize network performance.
Adaptive Time Division Multiple Access allows multiple remotes to share bandwidth dynamically.
Multi-frequency TDMA supports efficient multi-carrier operation across multiple frequencies.
Single Carrier Per Channel mode enables dedicated high-throughput connections.
Mx-DMA combines TDMA flexibility with SCPC performance, delivering both bandwidth efficiency and guaranteed throughput.
These waveform technologies allow the MDM3315 to operate efficiently across both small enterprise networks and large service provider infrastructures.
The MDM3315 supports high data rates suitable for modern satellite broadband applications.
Maximum throughput:
These speeds make the modem suitable for high-bandwidth applications such as enterprise networking, video streaming, and cellular backhaul.
Satellite networks typically suffer from latency due to the distance between earth stations and satellites. To mitigate this effect, the MDM3315 integrates advanced acceleration technologies.
Key acceleration features include:
These technologies reduce protocol overhead and significantly improve application performance across satellite links.
Security is critical for enterprise and government networks. The modem includes:
These features ensure secure communication across satellite networks while protecting sensitive data from unauthorized access.
| Parameter | Specification |
|---|---|
| TX Frequency Range | 950 – 2400 MHz |
| RX Frequency Range | 950 – 2150 MHz |
| TX Power Level | -55 dBm to +5 dBm (Dialog) |
| TX Power Level | -45 dBm to +5 dBm (Velocity) |
| Connector Type | F-Type 75 Ohm |
| Feature | Specification |
|---|---|
| BUC Power Supply | 24V / 4A or 43–44V / 3.5A |
| BUC Reference | 10 MHz or 50 MHz |
| LNB Voltage | 13V / 18V selectable |
| LNB Current | 500 mA |
| Polarization Control | 13/18V or 22 kHz tone |
| Interface | Specification |
|---|---|
| LAN Ports | 4 × 10/100/1000 Mbps Ethernet |
| Auto MDI/MDIX | Supported |
| Network Protocols | IPv4, IPv6, TCP, UDP, ICMP, ARP, DHCP, DNS, NTP, BGP |
| Technology | Symbol Rate | Modulation |
|---|---|---|
| DVB-S2/S2X | 1 Msps – 500 Msps | QPSK, 8PSK, 16APSK, 32APSK, 64APSK |
| MF-TDMA | Up to 7.6 Msps | QPSK, 8PSK |
| Mx-DMA MRC | Up to 25 Msps | QPSK, 8PSK, 16APSK |
| SCPC | Up to 64 Msps | QPSK – 64APSK |
| Parameter | Specification |
|---|---|
| Dimensions | 22 × 33 × 4 cm |
| Weight | 1.7 kg |
| Operating Temperature | 0° to 55°C |
| Storage Temperature | -30° to 60°C |
| Humidity | 5–95% non-condensing |
| Power Consumption | 60 W max |
The MDM3315 modem supports a wide variety of satellite communication applications.
Provides reliable broadband connectivity for corporate offices, remote branches, and enterprise WAN networks.
Supports mobile network operators by providing high-capacity satellite backhaul links for remote cellular towers.
Delivers broadband connectivity for ships, offshore platforms, and maritime operations.
Enables reliable multicast distribution of video and media content.
The modem offers several advantages that make it a strong choice for modern satellite networks.
High Throughput Performance
Supports up to 150 Mbps downstream capacity.
Wideband Forward Channel
Up to 500 Msps operation for HTS and VHTS satellite networks.
Multi-Waveform Support
Flexible return technologies including TDMA, SCPC, and Mx-DMA.
Integrated Acceleration Technologies
TCP acceleration and header compression improve application performance.
Strong Security Architecture
AES-256 encryption and hardware authentication.
Ease of Deployment
Multilingual web-based GUI and Point&Play installation tools simplify network setup.
VSATplus provides a complete solution for satellite communication equipment procurement and deployment.
When ordering the MDM3315 from VSATplus, customers receive:
Our experienced team ensures that your satellite network is designed and configured for maximum performance and reliability.
The ST Engineering iDirect MDM3315 Satellite Modem is a powerful and versatile VSAT modem designed to meet the evolving needs of modern satellite communications networks. With support for DVB-S2X wideband channels, advanced multi-waveform return technologies, high throughput rates, integrated acceleration, and strong security features, the MDM3315 is ideal for enterprise connectivity, cellular backhaul, maritime communications, and government networks.
By combining performance, flexibility, and reliability, the MDM3315 enables satellite operators and service providers to build scalable broadband networks capable of supporting the next generation of satellite services.
Organizations seeking to deploy high-capacity VSAT networks can order the MDM3315 Satellite Modem directly from VSATplus, where it is available with full technical support, configuration assistance, and global delivery.
