Future-proof alarm transmission for fire and intruder systems
The 2G/3G sunset in Sweden: what it means for alarms
Tele2, Telenor and Tre closed their 2G and 3G networks in December 2025, and Telia has closed 3G. Telia's 2G network is the last one left, and it is planned to close at the end of 2027.
Many fire and intruder alarm communicators still depend on it. That leaves them on a single network with a fixed end date. Now is the time to audit installed communicators and plan replacements on 4G and LTE-M.
For CCTV, access control and other security systems, see IoT connectivity for security.
Cellular connectivity for EN 50136 alarm transmission
EN 50136 sets the performance, reliability and security requirements for alarm transmission systems, from single path (SP) to dual path (DP) categories. Com4 supports data-based alarm transmission and provides the cellular path for communicators designed to these categories.
- Multi-network SIMs that let the communicator switch network if one fails
- Private APN and secure routing straight to the alarm receiving centre
- SIM status and data sessions visible in Polaris, our connectivity management platform
- Pre-activated SIMs and eSIM for fast installation
- LTE-M, NB-IoT, 4G and 5G on one SIM
The category a system achieves depends on the whole installation: communicator, transmission paths and receiving centre. Our team helps you plan the cellular part.
Fire alarm systems
Reliable data transmission from fire alarm panels to the receiving centre, on networks that will be there after 2027.
Intruder alarms
Connect intruder alarm communicators in homes and businesses with multi-network SIMs that cut the risk of single-network outages.
Alarm receiving centres
Route alarm traffic through a private APN to your receiving centre and monitor every SIM in Polaris.
2G/3G migration
Get help mapping installed communicators on legacy networks and planning a controlled move to 4G and LTE-M.
Secure transmission
Keep alarm signals off the public internet with private APN and encrypted connections.
Discover the Power of IoT with Com4’s Exclusive Free Test Kit
Ready to revolutionize your IoT journey? Com4 invites you to experience the future with our Free IoT Test Kit – a gateway to seamless connectivity and unparalleled possibilities.
The Free IoT Test Kit includes:
- Up to 5 SIM cards per applicant
- 100 MB of data per SIM per month, usable within the EU
- A 60-day validity period
- Possibility to include eSIM form factor
- Support for multiple technologies, including 2G/3G/4G/5G, LTE-M, and NB-IoT, all within a single SIM
Global cellular connectivity for alarm systems
Use one SIM for installations in the Nordics, Central and Eastern Europe and beyond. Part of Wireless Logic, Com4 brings 15 years of IoT experience, 1000+ customers and 20M+ connections across the group.
We are your true partner for IoT connectivity.
Planning a 2G/3G replacement programme or a new communicator? Talk to our IoT specialists about networks, testing and rollout.