APX™ Feature Description: Data Modem Tethering

Summary

This feature allows your APX radios to offload data to a cellular or public safety broadband network.

Details

Your P25 system is designed to keep you safe and in control. Voice calls and mission-critical data (such as GPS) are always prioritized. Ordinary data transmissions are not prioritized. When you need to push an update to your radios, such as a new codeplug or encryption keys, you may have to wait, especially if the network is busy. This feature allows you to speed up those transmissions by "tethering" your radios to a vehicle-mounted LTE modem. You can now route noncritical data over a mobile broadband network, improving speed and responsiveness. Portable radios are connected over Wi-Fi; mobile radios can be connected over Wi-Fi or using a USB cable.

Customer Benefits

Non-critical data such as radio updates can be delivered more quickly.

Dependencies

Portable radios must be Wi-Fi capable: APX 8000, APX 8000XE, or Enhanced ("BN") models of APX 6000, APX 6000XE and SRX2200.
Mobile radios can be connected over Wi-Fi or using a USB cable.
Mobile radios cannot also be connected to a DVRS unit.
All radios must have firmware release 7.18 or later.
Sierra Wireless MP70/RV55 LTE Vehicle Router supports 1 radio connection.
Motorola Solutions VML750 Vehicle-Mounted LTE Router supports 6 simultaneous radio connections.
Sierra Wireless GX440/450 LTE Vehicle Modem supports 1 radio connection.
Feature license must be purchased.

Compatibility

Portable Radios:

APX 8000, APX 8000XE (Wi-Fi)
APX 6000, APX 6000XE (Wi-Fi)
SRX2200 (Wi-Fi)

Mobile Radios:

APX 8500 (Wi-Fi or cable)
APX 7500 (cable)
APX 6500 (cable)
APX 4500 (cable)

Diagram Description

The diagram illustrates the data flow for APX radios using Data Modem Tethering. It shows a control center with a person operating multiple screens, connected via P25 to a vehicle. Within the vehicle, a mobile radio unit is shown. Data can flow from the control center to the vehicle's LTE modem via a high-speed data connection (red arrow). The LTE modem can then connect to portable radios via Wi-Fi (red arrow) or to mobile radios via Wi-Fi or a USB cable (red arrow). Voice and data traffic on the P25 network (blue arrows) are prioritized and flow directly between the control center and the mobile radio unit, and then to a portable radio. The system allows non-critical data to be routed over LTE and Wi-Fi, separate from the mission-critical P25 voice and data.

Sample Use Cases

Radio Updates

As part of Motorola Solutions' APX Device Management Services, the Radio Management service is enhanced by a broadband connection. Data Modem Tethering allows radios near vehicles to connect, overcoming the limitations of waiting for static Wi-Fi hotspots.

Over-the-Air Rekeying (OTAR)

For enhanced security, regular encryption key changes are crucial. Data Modem Tethering enables routing of AES 256 encryption key updates over LTE and Wi-Fi, significantly reducing rekeying time from days to under an hour, ensuring continuous security.

Text Messaging

When voice communication is prioritized on a busy P25 system, text messages can be delayed. Data Modem Tethering bypasses the congested P25 system, ensuring quick and efficient message delivery.

Disaster Response

In critical situations like natural disasters or major incidents, P25 systems must prioritize voice calls. Data Modem Tethering provides an essential secondary data link via LTE bandwidth without compromising mission-critical P25 voice communications, especially when data bandwidth is limited.

Contact Information

Motorola Solutions, Inc.
500 West Monroe Street, Chicago, Il 60661 U.S.A.
motorolasolutions.com

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