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Symphonie® iPackGPS | 4G LTE-TDD

Automate the transfer of measurement data from the field to your desktop through a 4G LTE-TDD network.

  • Symphonie® iPackGPS | 4G LTE-TDD

Configuration Options

The Symphonie iPackGPS | 4G LTE-TDD is an internet-enabled communications and autonomous power module for SymphoniePRO data loggers. Utilizing a specialized cellular modem that connects your data logger to the internet through a 4G LTE-TDD network, iPackGPS delivers measurement data from the field to your desktop.


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

See the SymphoniePRO Data Logger product page and user manual for more details. Note: iPackGPS units require a firmware upgrade for compatibility with the SymphoniePRO Data Logger.


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


The iPackGPS | 4G LTE-TDD contains one rechargeable 12 V sealed lead-acid battery and a recharging circuit. The battery recharging circuit is designed for use with an external 15 W 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 | 4G LTE-TDD ships with an omnidirectional antenna appropriate for sites where a cellular tower is nearby. If a different antenna solution is required, please contact us.


This iPackGPS requires 4G LTE-TDD 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 direct MetLink connection
  • Operation from remote locations with 4G LTE-TDD 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
  • 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
  • One (1) Symphonie iPackGPS | 4G LTE-TDD
  • One (1) cellular antenna
  • One (1) GPS antenna


  • Symphonie PV Panel | 15W sold separately.
  • SymphoniePRO includes built-in monitoring of the 12 V power supply and does not require a separate interface module.
  4G LTE-TDD (#9388)
Accessory type Internet-enabled remote communication and autonomous power module for SymphoniePRO® data loggers
  • Wind and solar resource assessment and forecasting
  • Enables internet features for SymphoniePRO where 4G LTE (TDD) cellular data services are available
  • Frequency Bands:
    • LTE FDD-4G: B1/B3/B5/B8
    • LTE TDD-4G: B38/B39/B40/B41
    • WCDNA: B1/B8
    • TD-SCDMA-3G: B34/B39
    • CDMA-3G: BC0
    • GSM-2G: 900/1800MHz
Instrument compatibility SymphoniePRO 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
  • 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/3G/4G (cellular) signal confirmation indicator
  • Accepts remote firmware updates
  • Automatic real-time clock setting from internet time server
  • Remote parameter updates of SymphoniePRO 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 Configuration via data logger desktop software on Windows PC (SymphoniePRO Desktop Application (SPD))
Data delivery
  • Data delivery via SMTP email and/or MetLink connections
  • Configuration changes and firmware updates administered via MetLink connections remotely or locally via logger USB connection
User interface
  • Status reporting via data logger user interface
  • Configuration via data logger desktop software on Windows PC (SymphoniePRO Desktop Application (SPD))
Configurable parameters
  • Call interval range: 10 minutes - 14 days
  • Internet Service Provider settings
  • Optional 'No Partial Files' setting
  • Up to three (3) email addresses
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 - 24 V)
Other External battery (12 - 14 V)
  • iPackGPS attaches to back of SymphoniePRO data logger with (4) long logger mounting screws
  • Standard multi-band cellular antenna is magnetically mounted to top of shelter box
  • GPS antenna is magnetically mounted to top of shelter box
  • Symphonie Solar PV panel 15 W (optional) available with lattice or tubular mount for NRG towers
Tools required 8 mm (5/16") wrench or nut driver for mounting screws
Accessories Cellular antenna and GPS antenna included
  • 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
  • Cellular antenna connector SMA female
  • GPS antenna connector QMA female
Dimensions 165 x 222 x 51mm (6.5 x 8.75 x 2.0 inches)
  • Weather-proof polycarbonate plastic
  • IP65 Rated
System requirements  
Computer Windows PC with SymphoniePRO Desktop Application (SPD) required for configuration
Operating system SymphoniePRO Desktop Application requires Windows 7 or higher
Related hardware
  • Symphonie Solar PV panel 15 W with lattice (Item 9111) or tubular mount (Item 9112)
  • Universal iPack Charger (Item 3615; included in 3368)

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