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LZT 123 7589 R1A
2. GR47/GR48 RADIO DEVICES
.
MS
SIM
POWER
SUPPLY
Figure 2.1 Main Blocks in a Wireless System (embedded application)
MS
SIM
POWER
SUPPLY
EXTERNAL
APPLICATION
MS STATUS &
RESPONSE
DTE
'AT' COMMAND
CONTROL M
Figure 2.2 Main Blocks in a Wireless System (external micro-controller)
In accordance with the recommendations of ITU-T (International
Telecommunication Union - Telecommunications Standardisation Sector)
V.24, the TE communicates with the MS over a serial interface.
GR47 / GR48
GSM
ENGINE
EMBEDDED
APPLICATION
STATUS &
RESPONSE
DCE
DTE
'AT' COMMAND
CONTROL
GR47 / GR48
GSM
ENGINE
DCE
DTE
GSM NETWORK
GSM NETWORK
8
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