All around the world mobile operators are shutting down 2G/3G networks in order to give way to 5G. Companies that operate smart meters with 2G/3G connectivity must plan the migration to the latest 4G LTE network which is well-positioned to dominate smart metering communication technologies in the upcoming years. The migration to LTE has many advantages, for example, a shorter readout time due to the high-speed network with low latency.
Utilities have two options for migration: replace the meters or upgrade the modems! The 1st option comes with a high CAPEX, while the 2nd option is a future-proof solution that reduces TCO.
Our company develops cellular modems that work smoothly and are fully compatible with the different models of SAPHIR® electricity meter models (Altys®, Enedis® meters).
Our cellular modems represent a future-proof migration solution to the LTE network with the same functionality, on higher data speed.
| Device type | Smart electricity metering cellular modem |
|---|---|
| Primary use case | Smart metering (AMI/AMR), Smart Grid, LTE and Cat.M upgrade of legacy meters |
| Cellular & RF Access Technology | LTE Cat.1 / 2G with CSD |
| Protocols | IEC Transparent, TCP |
| Interfaces, Physical Connectors | RS232 (RJ45) |
| Meter compatibility | SAPHIR compatible (Enedis, Altys type) electricity meters |
| Power & Environment | AC power from the meter — between -40 Celsius and +70 Celsius degree, IP51 protection |
| Approvals & Certifications | CE, RoHS, ReD DA |
| Firmware | Customized Free RToS (embedded system) |
| Installation | Fit under the terminal cover of the meter / optional DIN Rail mount adapter |
| Configuration | WM-E Term configuration software (downloadable) via local or TCP |
| Device Management | Device Manager software (Remote provisioning, firmware update, bulk config) |
| Security | TLS, Super capacitor (LastGASP notification) option, Surge protection |
Our modem forms part of the AMI (Advanced Metering Infrastructure) of the utility company.
This external modem can be mounted on DIN-rail and connected to the meter through an RJ45 cable.
The device can be configured to “push” the read out the data (current consumption, event log, load profile) from the connected meter and send it to the HES periodically via Internet (by using an APN) at the pre-programmed intervals. Data sending can be also triggered by an alarm (e.g. power outage, cover removal event).
Configuration and firmware updates can be done remotely, minimizing the need for costly site visits. The modem can be accessed remotely through the cellular network. It can also read or modify certain parameters of the meter remotely via WM-E Term® configuration software.
The device is remotely manageable with the Device Manager® software (order option).
Product Datasheet
Updated: 2026-03-27
Quick Reference Guide
Updated: 2025-12-03
User Manual
Updated: 2025-12-03
WM-E Term User Manual
Updated: 2026-01-19
WM-E Term Appendix
Updated: 2025-01-22
Parameter Description (WM-E1S)
Updated: 2025-09-30
WM-E Term configuration tool
Updated: 2026-01-19
Video tutorial – Chapter 1. WM-E Term: Introduction
Video tutorial – Chapter 2. WM-E Term: How to Create a log file from the connected modem?
Video tutorial – Chapter 3. WM-E Term: Serial port connection settings
Video tutorial – Chapter 4. WM-E Term: Debug redirection
Video tutorial – Chapter 5. WM-E Term: How to change the Display Language?
Video tutorial – Chapter 6. WM-E Term: Use Log Files in WM-E Term (Tutorial video)
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