Siretta is a UK-based designer and manufacturer of industrial connectivity products specialising in cellular hardware for machine-to-machine (M2M) and IoT applications. They also supply the antennas, RF accessories, and engineering services that make real-world projects work. Unlike catalogue brands that rebadge OEM boards, Siretta’s range reflects real engineering depth—strong RF performance, robust enclosures, and sensible firmware design for field deployment.
If your job involves connecting equipment that must stay online in heat, noise, vibration, or remote isolation, Siretta’s products deserve a serious look. They build equipment that survives, not just benchmarks.
Company Overview
Siretta Ltd is headquartered in Reading, England. The company focuses entirely on industrial communications and cellular IoT, covering 2G, 3G, 4G LTE, 5G NR, LTE-M, and NB-IoT technologies. It designs, tests, and assembles products in the UK, supported by a global distribution network. Siretta’s background in RF design and antenna systems is evident throughout its portfolio—every router, modem, and analyser reflects the company’s deep understanding of cellular signal behaviour in real-world conditions.
Their size is modest compared to giants like Teltonika or Cradlepoint, but that can be a strength. Siretta can customise, adapt, and support customers with a level of direct contact that larger vendors rarely provide. This agility allows them to serve diverse markets, from utilities and manufacturing to retail, transport, and smart-city infrastructure.
Siretta’s Product Ecosystem
Siretta’s product line covers the full connectivity chain. For many integrators, that means fewer suppliers and fewer variables to manage.
Industrial Routers
A family of rugged 4G and 5G routers designed for IoT, M2M, and edge applications. Models range from compact single-port LTE gateways to multi-port 5G edge hubs with serial and I/O integration.
Industrial Modems and Gateways
Standalone modems for embedded use or serial-controlled applications where a host device manages data sessions. Ideal for retrofitting cellular connectivity into existing systems or integrating with PLCs and controllers.
Antennas and RF Accessories
Extensive range of LTE, 5G, GNSS, Wi-Fi, and ISM antennas, including panel, puck, whip, magnetic, adhesive, and marine-grade types. Siretta also provides the matching cables, connectors, and lightning arrestors for complete RF hygiene.
Network Analysers and Tools
Handheld signal analysers, testers, and monitoring tools for installers and engineers. Used to locate optimal mounting positions and detect real network conditions, these tools make a measurable difference to project reliability.
Engineering Support and OEM Services
Siretta’s in-house team provides firmware adjustments, connector changes, and product branding for OEM customers. Their engineering flexibility is a strong differentiator in a market dominated by fixed SKUs and outsourced support.
The Siretta Industrial Router Range
At the heart of Siretta’s connectivity solutions lies its QUARTZ family of industrial routers. The naming convention is straightforward: each variant represents a step in size, resilience, and performance—from simple LTE gateways to full-blown 5G edge routers.
QUARTZ-COMPACT LTE (EU/US, optional GPS)
What it is:
An ultra-compact single-port LTE router for space-constrained environments such as payment kiosks, vending machines, or small controllers.
Key features:
- LTE connectivity with 3G fallback
- 1 × 10/100 Mbps Ethernet port
- Single SIM slot
- Optional GNSS for location tracking
- Optional RS232 serial interface
- Industrial metal enclosure, wide 5–32 V DC input
- Operating temperature –30 °C to +70 °C
- Full VPN stack (IPsec, OpenVPN, L2TP, GRE, PPTP)
- NAT, firewall, DDNS, DMZ, port forwarding
- Compact footprint with DIN-rail or wall mount options
Typical use cases:
Payment terminals, ticketing machines, digital signage, kiosk systems, and simple telemetry controllers where cost and footprint matter most.
QUARTZ-LITE (Dual-Port LTE)
What it is:
A small footprint LTE router with two Ethernet ports for sites that need WAN/LAN separation and modest segmentation.
Key features:
- LTE with 3G fallback
- 2 × 10/100 Mbps Ethernet ports (configurable)
- Single SIM
- Optional Wi-Fi or GNSS
- Firewall, NAT, VLANs, DDNS, port forwarding
- Optional RS232 interface
- Wide DC input, metal chassis, industrial temperature rating
Typical use cases:
Environmental monitoring, small retail systems, industrial controllers, and IoT gateways requiring a slightly richer network layout than a single-port device.
QUARTZ Dual-SIM LTE (Workhorse)
What it is:
Siretta’s staple industrial router. Dual SIMs provide network redundancy, while dual Ethernet, serial ports, and I/O give flexibility for complex installations.
Key features:
- Dual SIM with automatic failover
- LTE with 3G fallback
- 2 × 10/100 Mbps Ethernet ports (WAN/LAN or dual LAN)
- RS232 and digital I/O (configurable)
- Optional Wi-Fi and GNSS variants
- VPNs: IPsec, OpenVPN, GRE, L2TP, PPTP
- Full routing and firewall suite
- Industrial 7–32 V DC input
- Rugged metal case, DIN-rail mount
- Watchdog timers and link-health monitoring
Typical use cases:
Building management systems, SCADA networks, small CCTV rings, and automation panels that demand resilience and remote visibility.
QUARTZ-GOLD (LTE, Gigabit LAN)
What it is:
A performance-oriented LTE router with gigabit Ethernet ports and optional dual-band Wi-Fi. Designed for higher-speed data transfer without jumping to 5G.
Key features:
- LTE Category 4/6 connectivity (up to 150 Mbps downlink)
- 2 × Gigabit Ethernet ports
- Single SIM
- Optional dual-band Wi-Fi and GNSS
- Optional RS232/RS485 ports
- VPN, VLAN, QoS, and routing control
- Wide DC power input range
- Metal enclosure, industrial operating range
Typical use cases:
HD camera backhaul, multi-device networks, high-bandwidth telemetry, small edge nodes, and retail/branch network redundancy.
QUARTZ-GOLD 5G (Gigabit LAN, 5G NR)
What it is:
The 5G-ready evolution of the GOLD series. A future-proof router with the latest cellular technology for bandwidth-intensive IoT and edge applications.
Key features:
- 5G NR (NSA/SA) with 4G LTE fallback
- 2 × Gigabit Ethernet ports
- Optional Wi-Fi and GNSS
- Industrial power and temperature specifications
- VPN protocols including IPsec and OpenVPN
- 7.5–32 V DC input, metal enclosure
- Optional RS232 and I/O interfaces
Typical use cases:
CCTV backhaul, transport, event connectivity, construction sites, and high-data telematics requiring 5G speed and low latency.
QUARTZ-ONYX 5G (Quad-Port Edge Hub)
What it is:
The flagship of the Siretta router family. A multi-port 5G edge router for large IoT sites and complex network segmentation.
Key features:
- 5G NR (global bands) with LTE fallback
- 4 × Gigabit Ethernet ports
- Dual SIM for failover
- RS232/RS485 serial ports and digital I/O on select models
- Optional GNSS
- Full industrial-grade metal housing
- VPNs: OpenVPN, IPsec, L2TP, GRE, PPTP
- VLAN support, watchdog recovery, link-health monitoring
- Extended temperature and humidity tolerance
Typical use cases:
EV charging hubs, CCTV control cabinets, smart transport systems, process plants, and edge computing environments connecting multiple local networks to the cloud.
Quick Model Reference
| Requirement | Recommended Model | Key Reason |
|---|---|---|
| Single device, small cabinet, cost-sensitive | QUARTZ-COMPACT LTE | Minimal footprint, low power |
| Small multi-device site | QUARTZ-LITE | Two ports for WAN/LAN separation |
| Critical site, dual SIM resilience | QUARTZ Dual-SIM LTE | Network failover, serial + I/O |
| Higher throughput without 5G | QUARTZ-GOLD LTE | Gigabit LAN, better CPU, Wi-Fi |
| Future-proof 5G upgrade path | QUARTZ-GOLD 5G | 5G NR performance |
| Large edge hub with multiple LANs | QUARTZ-ONYX 5G | Four gigabit ports, full industrial power |
Using Siretta Routers with IoT SIM Cards
Siretta routers are built with IoT SIM deployments in mind—especially where private IP, VPN access, and network redundancy are required.
SIM and Network Planning
- Dual SIM variants enable carrier diversity and uptime guarantees.
- Private IP SIMs are supported via VPN access (OpenVPN/IPsec).
- Roaming IoT SIMs function reliably thanks to strong reconnect logic.
- eSIM compatibility is available on select models—check module type before deployment.
VPN and Security
Siretta’s firmware supports site-to-site tunnels, client VPNs, and full packet filtering. You can configure OpenVPN or IPsec tunnels for private SIM environments that use CGNAT, allowing secure remote access without exposing ports.
Antennas and RF Planning
The routers’ performance is only as good as the antenna chain. Siretta’s advantage is their matching antenna ecosystem—meaning gain, impedance, and cable loss are properly matched from the outset. Use dual or quad MIMO antennas for LTE/5G variants and keep coax runs short.
Deployment and Maintenance
Firmware templates, watchdogs, and auto-reconnect logic keep routers alive through transient power or cell drops. SNMP and syslog support allow monitoring integration with existing NMS platforms.
Strengths and Weaknesses
Strengths
- Industrial DNA: Metal enclosures, wide temperature range, and clean DC input design across all models.
- RF Credibility: Antennas, cables, and accessories all from one brand ensure predictable performance.
- Dual SIM Redundancy: Reliable automatic failover on key models.
- Flexible Firmware: VPNs, VLANs, NAT, and watchdog timers tuned for IoT reliability.
- OEM Friendly: Custom branding, firmware adjustments, and connector changes available.
- Good Value: Industrial quality without enterprise-level licensing costs.
Weaknesses
- Limited Cloud Management: The remote management offering isn’t as deep as Teltonika RMS or Cradlepoint NetCloud.
- Longer Lead Times on Niche SKUs: Special variants (with serial/I-O) may require ordering ahead.
- Smaller Ecosystem: Fewer turnkey integrations or app frameworks than bigger US or EU competitors.
- Firmware Maturity: While stable, it doesn’t yet offer the multi-tenant orchestration features enterprise buyers expect.
Typical Applications
CCTV and Security
- Challenge: Reliable uplink, firewall protection, VPN access, remote reboot.
- Solution: Dual-SIM LTE or GOLD/ONYX for multi-camera bandwidth. Private IP SIM with VPN ensures secure viewing from the monitoring station.
Building Management and HVAC
- Challenge: Serial connectivity, low data, continuous uptime.
- Solution: Dual-SIM LTE with RS232/RS485 and I/O. Use IPsec to connect back to the BMS server.
Utilities and Environmental Monitoring
- Challenge: Harsh sites, limited power, low-bandwidth telemetry.
- Solution: LITE or Dual-SIM LTE with external antennas and watchdogs.
- Note: Ensure proper surge protection on power and antenna feeds.
Retail and Payment
- Challenge: Quick installation, small cabinet, PCI compliance.
- Solution: COMPACT LTE with VPN-only outbound access. Disable management over WAN.
EV Charging and Smart Transport
- Challenge: Roaming coverage, high data, live diagnostics.
- Solution: GOLD 5G or ONYX 5G with dual SIM.
- Note: Use vandal-proof puck antennas and short RF cables.
Competitor Analysis
Teltonika Networks
Teltonika dominates the industrial LTE market through volume, price, and a strong management platform. Their routers are widely used in CCTV and transport.
Siretta advantage: deeper RF ecosystem, stronger focus on antenna performance, and more willingness to customise hardware or firmware.
Robustel
Robustel shares Siretta’s industrial mindset—metal casings, dual SIMs, rich VPNs.
Siretta advantage: better antenna and accessory integration, plus UK-based engineering support.
Digi and Sierra Wireless (AirLink)
Enterprise-grade reliability and mature cloud tools.
Siretta advantage: simpler deployment, lower total cost, and no recurring licence for basic management.
Cradlepoint and Peplink
Strong in SD-WAN and vehicle networking, with extensive software suites.
Siretta advantage: cleaner, more focused industrial design for cabinets and SCADA, not office-style routing.
Four-Faith, WLINK, and Value Brands
Compete mainly on price.
Siretta advantage: proven RF engineering, better QC, support responsiveness, and proper industrial documentation.
Summary:
Siretta sits comfortably between entry-level OEM routers and high-end enterprise systems. They offer professional-grade performance and build quality, without the cost or complexity of a managed service platform. For integrators and engineers who handle their own networks, that’s a powerful balance.
Deployment Checklist for IoT SIM Projects
- Select the model based on site size, data rate, and redundancy need.
- Confirm APN and IP type before staging.
- Configure VPN from the start—never rely on public IP exposure.
- Select antennas suited to the frequency and MIMO count.
- Protect power with clean DC and surge suppression.
- Document golden configuration for replication.
- Test failover between SIMs and link recovery on power drops.
- Integrate monitoring via SNMP or API for proactive alerts.
- Label routers and SIMs with ICCID, IMEI, MAC, and site ID.
- Maintain spares—keep a pre-imaged router per region or cluster.
Final Word
Siretta’s industrial routers are designed for what most IoT projects truly face: inconsistent signal, limited space, unpredictable power, and the need to work without supervision. Their hardware is rugged, their firmware is practical, and their ecosystem of antennas and accessories makes deployment predictable.
If you manage IoT networks that demand uptime without enterprise bloat, Siretta gives you exactly that—a lean, industrial-grade solution built for engineers, not marketers. Combine the right model with a well-chosen IoT SIM, use VPN-only access, and you’ll have connectivity you can trust in the toughest environments.