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For proper operation of terminals - GSM/GPRS network nodes, one needs a SIM card with
GPRS service enabled, permission to log in to existing APN and a static IP assignment.
A static IP address is the base for addressing terminals in packet transmission GPRS
networks.
Note that when using GPRS for real time monitoring, packet transmission networks add a
delay dependent of the route the addressed packet has to go between the sender and
recipient terminal. Usually this delay does not exceed a few seconds and is insignificant
from a monitoring perspective. In turn, the possibility of creating networks independent
of terrain topography and territorial size of the system is gained.
13.1.4. EDGE
EDGE
(Enhanced Data rates for GSM Evolution) is a technology for data transmission
employed in GSM networks.
This is an extension of GPRS technology ( EDGE is also called for EGPRS - Enhanced
GPRS), with enhanced radio interface allowing triple throughput (in most of current
systems up to 236.8 kbit/s) and dynamic adjustment of packet transmission speed
depending on transmission conditions.
13.1.5. UMTS
Universal Mobile Telecommunications System (
UMTS
) is a system of third generation
cellular phone networks following 2G systems like GSM. The new radio interface
significantly improved data transfer between the subscriber and the network boosting the
quality of service (384 kbit/s throughput).
13.1.6. HSDPA
HSDPA
(High Speed Downlink Packet Access) is a technology based on shared
transmission channel. The main feature is dynamic adaptation to changes in radio
environment and quick retransmission of faulty data. The HSDPA technology allows
transmission from the network to device with 14,4 Mb/s speed.
13.2. Application examples
This chapter shows basic configurations of systems employing MT-101 modules.
13.2.1. Communication with single module
This is the simplest possible monitoring system based on transmission of SMS messages
by MT modules in case of event defined during module configuration. In this mode, the
module sends text SMS with static or dynamic content holding information on
input/output states or content of module's internal registers. This mode may be
employed in systems where continuous monitoring is not imperative but alert when
defined event occurs or an answer for enquiry is wanted. SMS syntax is described in
appendices.
Содержание MT-101
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