Installation Guide

7/21/2020 TTU-2900 Hardware & Installation Guide - PULS Wiki
4/29
LTE
2.2.5 TTU-2900™
The TTU-2900™ is responsible for delivering the location and status information when and where it is needed. Data requests can come from any
of the following sources:
PEG™ script within the TTU-2900™
A location or status request from the LM Direct server
A location or status request from LMU Manager
A request made from a host device such as a laptop, PDA or MDT
2.2.6 Host Device – Laptop/PDA or MDT
In some cases, it is necessary to run an application in the vehicle while it is being tracked by the backend software. Such examples could include
instant messaging between vehicles or a central office, in-vehicle mapping or driving directions, email or database access. In most of these cases
you will be using the TTU-2900™ as a wireless modem as well as a vehicle-location device.
2.3 Wireless Data Primer
This section is meant to give an overview of the wireless data technologies employed by the CalAmp location products.
2.3.1 SMS (Short Message Service)
The Short Message Service (SMS) is the ability to send and receive text messages to and from mobile telephones. The text can comprise of words
or numbers or an alphanumeric combination. SMS was created as part of the GSM Phase 1 standard.(Excerpt taken from the GSM World website
(http://www.gsmworld.com/technology/sms/intro.shtml#1))
SMS message are typically text based, though binary messages are possible and can range in size from 140 characters to 256 characters depending
on the network being used.
2.3.2 LTE (Long-Term Evolution)
Long-term evolution (LTE) is the latest and rapidly growing global data transmission technology. Based on GSM and UMTS/HSPA standards,
LTE is a standard of high-speed wireless data transmission and communication. Continuously evolving, LTE advancements continue to push data
capacity and user experience on a global scale. With a peak downlink rate of 300 mbps, uplink rate of 75 mbps, LTE sits in 1.4 MHz to 20 MHz
bands, while also supporting FDD, TDD, and not sacrificing data capability.
"Both LTE FDD and TDD offer very high data rates, low latency, and seamless interworking with 3G, as well as between FDD and TDD
networks. They also leverage common core network." (Excerpt taken from the Qualcomm website
(https://www.qualcomm.com/invention/technologies/lte))
LTE is the most current and advanced data technology network for MDT's (mobile data terminals) and other mobile devices, and an upgrade over
GSM/UMTS and CDMA. LTE frequency bands vary internationally, so it is important to note device configuration will dictate proper
functionality.
3 Hardware Overview
3.1 Location Messaging Unit-TTU-2900™
3.1.1 TTU-2900™ Handling Precautions
Electrostatic Discharge (ESD)
Electrostatic discharge (ESD) is the sudden and momentary electric current that flows between two objects at different electrical potentials caused
by direct contact or induced by an electrostatic field. The term is usually used in the electronics and other industries to describe momentary
unwanted currents that may cause damage to electronic equipment.
WARNING: This product can expose you to chemicals including carbon black, nickel, & bisphenol A, which are known to the State of
California to cause cancer and birth defects or other reproductive harm. For more information go to https://www.P65Warnings.ca.gov.
ESD Handling Precautions
ESD prevention is based on establishing an Electrostatic Protective Area (EPA). The EPA can be a small working station or a large manufacturing
area. The main principle of an EPA is that there are no highly charging materials in the vicinity of ESD sensitive electronics, all conductive