Automate the transfer of measurement data from the field to your desktop via AT&T's 3G or 4G LTE network.

Product Configurations



The Symphonie iPackGPS | LTE-ATT is a remote communications and autonomous power module for Symphonie series data loggers. This iPackGPS delivers measurement data to your desktop by utilizing a specialized cellular modem that connects your data logger to the internet through AT&T’s 3G or 4G LTE cellular network.


When used with the SymphoniePRO® Data Logger, iPackGPS enables remote bi-directional communication with the SymphoniePRO Desktop Application using our MetLink protocol in addition to the traditional SMTP email data delivery path. MetLink connections can be initiated either by the logger or the SymphoniePRO Desktop Application, allowing you to connect remotely as needed.

Flexible scheduling options and support for multiple data delivery methods provide redundant paths for the transfer of critical resource data. Once established, remote MetLink connection sessions provide full access to the data logger and iPack, including:

  • Automated or manual download of data files (alternative to SMTP email)
  • Live data viewing for site health checks
  • Configuration settings changes in the data logger or iPack
  • Firmware upgrades to the data logger or iPack


iPackGPS attaches to a port located on the back of your Symphonie series data logger. The iPackGPS and the data logger are then secured to a Symphonie shelter box using four screws.


The iPackGPS | LTE-ATT contains one rechargeable 12 V sealed lead-acid battery and a recharging circuit. The battery recharging circuit is designed for use with an external 15W PV panel that connects to terminals on the side of the iPackGPS. Terminals for an external power system are also available. This configuration keeps the internal batteries continuously charged—ensuring reliable data logging and transfer operations.


Each iPackGPS | LTE-ATT ships with an omnidirectional antenna appropriate for sites where a cellular tower is nearby.


The iPackGPS | LTE-ATT requires either 3G or 4G LTE data service and an Internet Service Provider (ISP) account to function properly. GSM and ISP accounts need to be obtained from the provider of your choice, and the required settings for the accounts should be programmed into the Symphonie iPackGPS prior to use.


  • Automatic transfer of logged data via email, or additionally, via direct MetLink connection when used with SymphoniePRO
  • Operation in the USA with AT&T’s 3G or 4G LTE service
  • Integrated autonomous power supply saves installation time and powers entire system
  • Customizable data transmission fits your schedule or application with call intervals ranging from 10 minutes to 14 days
  • WindLinx™-ready wireless service and web-based management portal
  • Access to network information including signal strength, network operator, modem band, DNS, and IP address
  • Complete iPackGPS history log to monitor events from communication sessions
  • Automated GPS coordinate reporting
  • Ability to remotely update the iPackGPS firmware and configuration

In The Box

  • One (1) Symphonie iPackGPS | LTE-ATT
  • One (1) WindLinx SIM card with activation form
  • One (1) cellular antenna
  • One (1) GPS antenna


  • Symphonie PV Panel | 15W sold separately.
  • The iPack voltmeter SCM is now included in SymphoniePLUS3 data logger kits. SymphoniePRO includes built-in monitoring of the 12V power supply and does not require a separate interface module.


  4G LTE-ATT (#9389)
Accessory type Internet-enabled remote communication and autonomous power module for Symphonie® series data loggers
  • Wind and solar resource assessment and forecasting
  • Frequency Bands (MHz)
    • 4G: 700 (B12/B13)/850 (B5)/AWS 1700 (B4)/1900 (B2)
    • 3G : 850 (B5)/1900 (B2)
  • USA
Instrument compatibility Symphonie series data loggers
  • Enables remote MetLink connections for real-time two-way communication, including automated data delivery, firmware updates, and/or configuration updates to data logger and iPackGPS
  • GPS time synchronization
  • Cellular band and operator management via SymphoniePRO Desktop Application
  • Automatic transfer of logged data via email
  • Automatically updates latitude, longitude, and altitude settings in the data logger
  • GPS position viewer
  • iPackGPS status and event reporting
  • GSM (cellular) signal confirmation indicator
  • Accepts remote firmware updates
  • Automatic real-time clock setting from internet time server
  • Remote parameter updates of Symphonie series data loggers and iPackGPS
  • Ability to disconnect a call in progress
  • Event log viewer
  • Includes rechargeable battery and PV charge controller for the data logger
Data Collection
Software SymphoniePRO Desktop Application
Data delivery
  • Data delivery via SMTP email and/or MetLink connections
  • Configuration changes and firmware updates administered via MetLink connections
  • Test functions for all data delivery methods, with access to these features from both the logger LCD and SymphoniePRO Desktop Application
User interface
  • Status reporting on data logger front panel
  • Configuration via desktop software on Windows PC
Configurable parameters
  • Internet Service Provider settings
    Other settings (schedule, SMTP, etc.) stored in data logger allowing minimal disruption to settings in the event of iPack swap.
Power requirements
Batteries One (1) built-in 12 V Sealed Lead-Acid (SLA) battery with 2200 mA-hr rating
External solar input 12 V (nominal) solar PV panel or external power supply (15 to 24 V)
Other External battery (12 - 14 V)
  • iPack stacks with Symphonie data logger using long logger mounting screws (included)
  • Logger and iPackGPS attach to logger mounting bracket; Keyed slots allow for easy installation/removal in shelter box
  • Standard multi-band cellular antenna is magnetically mounted to top of shelter box
  • GPS antenna is magnetically mounted to top of shelter box
  • An optional 15 W solar PV panel (sold separately) mounts to your tubular tower with supplied hose clamps
Tools required 8 mm (5/16") wrench or nut driver for mounting screws
Accessories Cellular antenna and GPS antenna included
  • Data connection to iPack connector on rear of data logger
  • Two (2) screw terminals for solar PV panel or external power supply input
  • Two (2) screw terminals for external battery
  • One (1) screw terminal for earth ground pre-wired for connection to data logger earth ground stud
  • GSM antenna connector SMA female
  • GPS antenna connector QMA female
  • Programming port connection via data logger programming adapter, or USB in case of SymphoniePRO
Dimensions 165 x 222 x 51mm ( 6.5 x 8.75 x 2.0")
Enclosure Polycarbonate plastic
System requirements
Computer Windows PC with desktop software for applicable data logger model:
  • SymphoniePRO Desktop Application for SymphoniePRO Data Logger
Operating system
  • iPackGPS Firmware | SymphoniePRO
  • iPackGPS Firmware | SymphoniePLUS3
  • SymphoniePRO Desktop Application requires Windows 7 or later
Related hardware
  • iPack Programming Kit (Item 3368)
  • Universal iPack Charger (Item 3615; included in 3368)


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