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RS232 9-way serial interface
5 V - 32 V DC input
4-wire audio connection
Antenna connection (FME male)
FCC and PTCRB approved
2.3 TT4031 (SE-GM29) in a Communication System
Figure 2.1 illustrates the main blocks of a wireless communication system
using the TT4031 (SE-GM29). It also shows the communication principles of
the system. The definitions in the figure, as used elsewhere in this manual,
are in accordance with the recommendations of GSM 07.07.
The MS (mobile station) represents the TT4031 (SE-GM29)
modem plus SIM card. The modem excluding SIM card, is known
as the ME (mobile equipment).
The TE (terminal equipment) is a micro-controller (i.e., a
computer) and is a part of the application.
Application
Figure 2.1 Main Blocks in a Wireless System
In
accordance
with
Telecommunication Union - Telecommunications Standardisation Sector)
V.24, the TE communicates with the MS over a serial interface.
The functions of the TT4031 (SE-GM29) follow the recommendations
provided by ETSI (European Telecommunications Standards Institute) and
ITU-T.
Owner's Manual
Wireless Communication System
ME status, responses
TE
(DTE)
AT commands to control MS
the
recommendations
Rev 1.0
GSM Network
MS
(TT4030)
of
ITU-T
(International
Page 16 of 16
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