
In the rapidly evolving world of satellite communications, network efficiency, scalability, and adaptability are the keys to success. Whether you're building robust enterprise connections, providing reliable cellular backhaul, powering government and military operations, or enabling global maritime communications, choosing the right satellite modem is mission critical. At VSATPlus, we are proud to offer one of the most advanced and versatile satellite modems on the market — the MDM3315 Satellite Modem by ST Engineering iDirect.
Engineered for high performance and seamless integration across multiple satellite network platforms, the MDM3315 sets a new benchmark in flexibility, efficiency, and reliability. In this article, we will explore the modem’s features, technical specifications, key advantages, and use cases — demonstrating why this modem is the perfect solution for your connectivity demands.
The MDM3315 is a high-performance, next-generation satellite modem designed to meet the connectivity needs of enterprise networks, cellular backhaul, maritime, government, and broadcast applications. With its broad support for multiple platforms (Dialog and Velocity), the MDM3315 provides unmatched flexibility in handling a wide array of services and return waveform technologies, including ATDMA, MF-TDMA, SCPC, and the cutting-edge Mx-DMA MRC.
This modem enables forward channel rates of up to 500 Msps, allowing for wideband HTS/VHTS usage and optimal bandwidth utilization. It offers remarkable data throughput — up to 150 Mbps downstream and 70 Mbps upstream — making it a high-capacity choice for next-gen broadband services.

Let’s take a closer look at the key features that make the MDM3315 a leading choice for satellite connectivity solutions:
Here is a comprehensive look at the modem's technical parameters and supported features:
| Interface | Specification |
|---|---|
| Tx Frequency | 950–2400 MHz |
| Tx Power Level | -55 dBm to +5 dBm (Dialog) / -45 dBm to +5 dBm (Velocity) |
| BUC Power | 24V / 4A or 43–44VDC / 3.5A (software selectable) |
| BUC Reference | 10/50 MHz at 0 dBm |
| Rx Frequency | 950–2150 MHz |
| LNB Power | 13/18VDC, 500 mA |
| LNB Control | Voltage or 22kHz tone for band and polarization selection |
| Interface | Specification |
|---|---|
| Ethernet Ports | 4 x 10/100/1000 Mbps Ethernet ports, auto MDI/MDIX |
| Platform | Rx (Downstream) | Tx (Return) |
|---|---|---|
| Dialog | DVB-S2/DVB-S2X up to 500 Msps | MF-TDMA, Mx-DMA HRC, Mx-DMA MRC, SCPC |
| Velocity | DVB-S2 | Adaptive TDMA |
| Return Technology | Modulations Supported | Symbol Rates |
|---|---|---|
| MF-TDMA | QPSK, 8PSK, 16APSK, 32APSK | Up to 7.6 Msps |
| Mx-DMA HRC | 4CPM QPSK, 8PSK | Up to 20 Msps |
| Mx-DMA MRC | QPSK, 8PSK, 16APSK, 32APSK, 64APSK | Up to 25 Msps |
| SCPC | QPSK, 8PSK, 16APSK, 32APSK, 64APSK | 1–64 Msps |
| DVB-S2X Outbound | QPSK to 64APSK | Up to 500 Msps |

| Parameter | Specification |
|---|---|
| Dimensions | 22 cm (W) x 33 cm (D) x 4 cm (H) |
| Weight | 1.7 kg (3.75 lbs) |
| Operating Temperature | 0°C to +55°C (32°F to 131°F) |
| Storage Temperature | -30°C to +60°C (-22°F to 140°F) |
| Humidity | 5% to 95% (non-condensing) |
| Parameter | Specification |
|---|---|
| Input Voltage | 48 VDC @ 4 Amps |
| AC Adapter | 50Hz 220–260V or 60Hz 100–130V |
| DC Option | -48VDC |
| Max Power Consumption | 60W |
The MDM3315 is suitable for a wide range of industry applications:
The dual-platform capability of the MDM3315 makes it an ideal choice for network operators and service providers. It allows deployment on both Dialog and Velocity platforms — with adaptive TDMA or MF-TDMA return links — depending on your application’s needs. Whether you’re operating a hub-spoke or mesh network, the MDM3315 supports seamless integration, network scalability, and optimal bandwidth usage.

The MDM3315 features a multilingual, intuitive web-based GUI that simplifies installation, configuration, and monitoring. The Point&Play tool supports zero-touch activation — making the modem easy to deploy even by non-technical personnel.
At VSATPlus, we are dedicated to delivering industry-leading satellite communication hardware and support. When you purchase the MDM3315 from us, you get:
The MDM3315 Satellite Modem is available now at VSATPlus. Whether you're upgrading an existing network or launching a new deployment, this modem gives you the performance, security, and scalability needed to stay ahead in a connected world.
📩 Visit us at www.vsatplus.com or contact our sales team to learn more and place your order.
🛰️ VSATPlus – Your Trusted Partner for Next-Generation Satellite Connectivity.
