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 meters.
This device was designed to be fully compliant with the SAPHIR standard. Our cellular modems represent a future-proof migration solution to the LTE network with the same functionality, on higher data speed. Configuration and firmware updates can be done remotely, minimizing the need for costly site visits.
| 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.4 / LTE Cat.1 / Cat.M/NB / 450 MHz; 2G fallback |
| 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 |
This external modem can be mounted on a DIN-rail and connected to the meter through an RJ45 cable. It can be configured to “push” the data it reads from the meter to the HES periodically at pre-programmed intervals or triggered by an alarm/event (for example, power outage, cover removal, reverse run etc.).
The modem reads actual and stored consumption data, recorded event log, load profile data, and can be used to read or modify certain parameters of the meter remotely. The device can be powered from the meter’s mains connection of the 57/100V AC power network (phase voltage) or 230/400V AC power network (line voltage).
It can be accessed remotely through the cellular network and it can send data on the Internet by using an APN.
The modem is fully configurable by our WM-E Term® software.
Product Datasheet – LTE Cat.1 module options with 2G or 2G / 3G “fallback”, LTE Cat.M / Cat.NB modules with optional 2G “fallback”
Updated: 2023-11-29
Product Datasheet – LTE Cat.4 / 3G / 2G module options
Updated: 2023-11-29
Quick Reference Guide
Updated: 2025-12-03
User Manual
Updated: 2025-12-03
WM-E Term User Manual
Updated: 2025-12-04
WM-E Term Appendix
Updated: 2025-01-22
Parameter Description (WM-E1S)
Updated: 2025-09-30
WM-E Term configuration tool
Updated: 2025-12-04
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)
4G LTE antenna with magnetic mount, SMA connection, 2.5m long RG174 cable, 6dBi max. gain
The remote management and maintenance of an IIoT solution can be a real challenge. Improve the network availability and operational efficiency of your fleet!
USB adapter for configuration of the WM-E2S (Itron compatible) and WM-E2SL (Landis+Gyr compatible) modems
Adapter cable for configuriation of the WM-E2SL (Landis+Gyr compatible) modem