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Qualcomm announced its Qualcomm 315 5G IoT Modem-RF System on May 20, 2021, positioning it as a purpose-built modem for industrial and enterprise Internet of Things devices. Qualcomm specified sub-6 GHz 5G NR in standalone mode with LTE fallback, plus a design intended to help device makers move from LTE modules to 5G. The announcement is historical: it said commercial availability was expected in the second half of 2021, but the cited materials do not establish current sales or network support.
What Qualcomm announced
The Qualcomm 315 was presented as a modem-to-antenna solution for makers of upgradeable LTE and 5G IoT devices. Qualcomm said it supported global sub-6 GHz 5G NR bands, standalone (SA) operation, and switching to LTE when needed. It was intended for use on public or private 5G networks and alongside existing Ethernet and wired technologies.
Qualcomm’s May 20, 2021 announcement described the product as its first purpose-built IoT modem solution with 5G connectivity optimized for industrial IoT. The company said it was expected to become commercially available in the second half of 2021; that was a launch-era expectation, not confirmation of present-day availability. Qualcomm’s announcement
Qualcomm’s published specifications
The figures below come from Qualcomm’s product brief. They are manufacturer specifications, not independent test results.
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- ✅Designed for Raspberry Pi 5, HAT+ standard design with onboard I2C EEPROM, and supports Raspberry Pi 40PIN GPIO stackable expansion. Extends 3x high-speed USB 3.2 Gen1 ports for connecting more peripherals
- ✅Onboard M.2(NGFF) Key B slot, supports SIM7600XX-M.2, SIM82XX and RM5XX series 4G/5G modules and is compatible with 3042/3052 packages. Onboard Type-C port for connecting to a PC for 4G/5G networking, debugging and firmware updating, or external power supply input
- ✅Onboard power monitoring chip for real-time measurement of voltage, current and power. Onboard SIM card slot for NANO-SIM card
- ✅Onboard Reset button, Power and Network indicators for easy debugging and monitoring the operating status. Comes with customized 5G-4IN1-PCB Antenna for neat wiring management, supports top or bottom installation
- ✅Reserved airflow vent and mounting holes for cooling fan to increase airflow and provide better heat dissipation
| Area | Qualcomm-published details |
|---|---|
| 5G standard | 3GPP Release 15 5G NR |
| 5G peak data rates | 1.54 Gbps download and 330 Mbps upload |
| 5G radio | Sub-6 GHz; 100 MHz bandwidth; 4×4 downlink MIMO; 64 QAM downlink and uplink |
| LTE capability | Cat.13 downlink and Cat.5 uplink |
| LTE peak data rates | 400 Mbps download and 75 Mbps upload |
| LTE frequency coverage | 700 MHz to 3.6 GHz |
| Positioning | Dual-frequency, multi-constellation GNSS |
| Integration features | Embedded Ethernet MAC, extended ambient operating temperature, antenna tuners, power trackers, and transmit/receive modules |
Peak-rate specifications are not guarantees of real-world throughput. Actual performance depends on factors such as network configuration, signal conditions, and the device implementation; the cited brief does not provide independent field measurements.
Qualcomm 315 5G IoT Modem Product Brief
How the design was meant to ease LTE-to-5G upgrades
Qualcomm said a reduced chipset footprint and integrated RF front end were designed to enable modules up to 50% smaller than existing 5G modules. The brief also said the module could fit the same form factor and retain pin-to-pin compatibility with current LTE legacy modules, potentially allowing an OEM to upgrade with minimal or no hardware changes. These are Qualcomm design claims; the cited materials do not provide independent validation or a like-for-like comparison against competing products.
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- Support 5G modules with M.2 (NGFF) Key B interface, compatible with SIMCom and Quectel 5G modules
- Support 5G modules with 3042/3052 form factor, such as SIM82XX, and RM50XQ series 5G modules
- USB 3.1 Type A port for connecting to PC, Raspberry Pi, or Jetson Nano host board to enable high speed 5G network
- 4x SMA antenna connectors, easy to install the antenna Onboard SIM card slot for NANO SIM card
- Onboard power and network indicators, with multiple reserved pads, for checking module operating status and testing other functions
The product brief also described extended-life hardware and software support for a minimum of eight years through 2029. That is a launch-era statement from Qualcomm, not evidence that terms remain unchanged today or that every device design receives identical support.
Where Qualcomm saw industrial and enterprise uses
Qualcomm listed retail, energy, automation and manufacturing, precision agriculture, construction, mining, and public venues as target sectors. In those settings, cellular connectivity could complement wired Ethernet and other existing technologies rather than automatically replace them. Whether a deployment can use the modem depends on its network, radio-band, interface, and device requirements.
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- Wide Frequency Band: This 5G module supports various network standards such as 5G , 4G LTE and 3G WCDMA, covering a wide range of frequency bands, allowing users to enjoy faster data speeds and more stable network connections.
- High Speed: This 4G LTE network provides download speeds of up to 4.67Gbps and upload speeds of 1.25Gbps under 5G networks, users can quickly download and upload large amounts of data, improving work efficiency and online entertainment experience.
- MIMO Technology: This 5G supports 4x4 MIMO technology which can provide better coverage and higher speeds, giving users a more stable connection when using the network.
- GNSS Modem: This DW5931e network is equipped with a GNSS modem to provide accurate navigation and positioning functions to meet the user's needs for location information.
- Widely Compatible: This 5G network module is compatible for and for Linux operating system, suitable for laptop, desktop and tablet, etc.
The launch announcement identified Quectel’s RG500S and RM500S 5G NR module series as products that would use the Qualcomm 315. It also quoted Fibocom, MeiG, Telit, Bosch Rexroth, Schneider Electric, Siemens, and HMS Networks in connection with the industrial 5G ecosystem. HMS said it had released an industrial automation 5G router using Qualcomm Technologies’ 5G solutions, but the announcement did not name the router model. Those launch-era references do not establish current stock, compatibility, or commercial terms.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What to check before choosing an industrial 5G modem
The Qualcomm 315’s stated capabilities can help define a shortlist, but the announcement does not compare it with named alternatives. Before selecting any module for a deployment, verify the exact SKU and its fit with the intended network and device.
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- The adapter can't work for WLAN card without LTE moudle. Also can't work for SSD.
- The adapter can't work if you only plug in the sim card. Please insert WWAN card and SIM card together. Suitable for MU736/ME936/ ME906V, ME906C, ME906E, ME906J, Sierra Wireless Airprime EM7305 EM7345 EM7355 EM7430 and other NGFF interface communication module.
- Ideal for testing the WWAN cards. You don't need to break or open your laptop to test your WWAN modules.
- Has integrated with a SIM card slot and WWAN slot It can work with most of Key-B WWAN modules.
- Very easy to use. Don't need extra drivers. Just make sure you have installed the drivers software for your WWAN card.
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- The RM520N is a series of 5G IoT modules specially optimized for IoT/eMBB applications, designed in an M.2 form factor in accordance with the 3GPP Release 16 specification, which supports both 5G NSA and SA modes, NSA data rates: 3.4Gbps (DL) / 550Mbps (UL), SA data rates: 2.4Gbps (DL) / 900Mbps (UL).
- The RM520N is compatible with Quectel’s 5G module series RM50xQ, LTE-A Cat 6 module EM06, Cat 12 module series EM12/EM12xR/EM120K, and Cat 16 module EM160R-GL, facilitating migration from LTE-A to 5G. Support Worldwide 5G and LTE-A coverage Cellular Data Network.
- The RM520N is an industrial-grade 5G module for industrial and commercial applications only. It covers nearly all the mainstream carriers worldwide and supports IZat location technology Gen9C Lite (GPS, GLONASS, BDS and Galileo). The integrated Multi-constellation GNSS receiver greatly simplifies the product design and provides quicker, more accurate and dependable positioning capability.
- The RM520N IoT 5G NR Sub-6G Module has a rich set of Internet protocols, industry-standard interfaces and abundant functionalities (USB and PCIe drivers for Windows 7/8/8.1/10, Linux, and Android). Size: 30mm × 52mm × 2.3mm, Extended temperature range of -40°C to +85°C.
- The RM520N 5G Cellular Data Modem Module can be adopted in a wide range of eMBB and IoT applications including industrial routers, home gateways, STB, industrial laptops, consumer laptops, industrial PDAs, rugged tablet PCs, video transmission, and digital signage.
- Regional bands: Confirm that the module supports the 5G and LTE bands used at the installation site.
- Network mode: Check whether the deployment requires 5G SA, LTE fallback, a public network, or a private 5G network, and confirm compatibility with the operator or private-network equipment.
- Throughput and radio needs: Match the application’s requirements to supported bandwidth, MIMO configuration, and uplink and downlink performance; do not treat peak manufacturer rates as field guarantees.
- Mechanical and electrical integration: Validate the module’s dimensions, pinout, interfaces, thermal conditions, and any claimed LTE-module compatibility against the device design and the exact module documentation.
- Location and wired connectivity: Establish whether GNSS and Ethernet are needed and confirm the implementation details for the selected module.
- Lifecycle support: Obtain current written terms for software, hardware, and product availability rather than relying on a launch-era support statement.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
