WM Systems - Innovation in Smart IoT Systems Landis+Gyr electricity metering modems for retrofit 2G to 4G : WM Systems LLC – Innovation in Smart IoT systems

The world of wireless communication, of M2M & IoT have known for years that the obsolete GPRS (2G) networks should be migrated to the state-of-art 4G LTE network worldwide.

Thus, the single most important challange nowadays the IoT world is faced: how to migrate the obsolete 2G/GPRS, 3G communication devices to the latest 4G LTE technology?

No need to worry though – WM SYSTEMS LLC is there for you!

The upgrade of the currently used 2G/3G communication devices to the 4G-level should be performed in the near future. Utility companies and energy providers dispose of a rather tight timeframe for this migration.

Our wireless modems represent a future-proof migration solution to the LTE network with the same functionality, on higher data speed.

For retrofit purposes, we offer our 4G devices with migration-platform modules with the same connection and meter manufacturer standards’ compatibility and the usual outfit – with 2G fallback compatibility (if you still need to use it).


  • installed meters can be used without changing metrology
  • snap-in modems (drop & plug, easy installation)
  • 4G with 2G fallback (backward compatibility with current systems)
  • long-term solution: the 4G LTE will be used for 10 years or more


   for Landis+Gyr® E350 / E450 / E550 meters
     (ZxG3xx / ZxG4xx / ZxG5xx types)

  • RS232 compatible RJ45 connection
  • It provides transparent data link to the HES centre (remote meter readout of meters)
  • Snap-in modem, installable into the meter enclosure
  • Design & connectivity satisfy L&G® standards
  • Power supply from the metrology (DC power)
  • „Pull” data sending (for HES request)
  • Supercapacitor / IEC 62056-21 protocol


  • Remote & safe firmware updates, config by SMS text, free configuration tool
   for Landis+Gyr® E350 / E450 meters
     (ZMD310 / ZMD410 types)

  • RS232 and RS485 (2 or 4-wire) connection
  • It provides transparent data link to the HES centre (remote meter readout of meters)
  • Meter data DL and configuration on the provider’s request on pre-determined schedule / on-demand
  • It can be installed under the terminal cover and fastened securely
  • Design & connectivity satisfy L&G® standards

  • Power supply from the metrology (AC power)
  • Surge protection from 4kV up to 12kV
  • „Push” data sending / IEC 62056-21 protocol
  • Scheduled data sending / trigger by alarm
  • Remote & safe firmware update


More information about the Related Products:


You can download this article here:

WM-E2SL® modem for Landis+Gyr® E350 / E450 / E550 meters

(ZxG3xx / ZxG4xx types)

WM-E2SL modem


WM-E1SL® modem for Landis+Gyr® E350 / E450 meters

(ZMD310 / ZMD410 types)

WM-E1SL modem


Pay attention to the following products



CDMA 450 / 2G / 3G / 4G / LTE-M / Narrow Band modems for Landis+Gyr E350 / E450 electricity meters (ZMD310, ZMD410 types)



CDMA 450 / 2G / 3G / 4G / LTE 450 / Narrow Band modems for Landis+Gyr E350, E450, E550 (type ZxG 3xx and ZxG 4xx) electricity meters


UniTerm configuration tool

UniTerm configuration tool for the Itron and Landis+Gyr compatible metering modems (WM-E2S and WM-E2SL)


Smart Electricity Metering Modems

Industrial & commercial consumption metering, remote meter readout with CDMA 450 / 2G / 3G / 4G / LTE Cat.M / Cat.NB data transmitting modems.
Our devices are matched with the electricity meters of flagship manufacturers (Elster, Honeywell, Itrón, Landis & Gyr, EMH). Software solutions satisfy the provider’s requirements. Unique needs, further customization can be developed in a timely manner.


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