MC55i Terminal Hardware Interface Description
3.3 Operating Modes
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MC55i_Terminal_HD_v01.201a
Page 20 of 47
2010-04-16
Confidential / Released
3.3
Operating Modes
The table below briefly summarizes the various operating modes referred to in the following
chapters.
Table 8:
Overview of operating modes
Normal operation
GSM / GPRS SLEEP
Various power save modes set with AT+CFUN com-
mand.
Software is active to minimum extent. If the Terminal was
registered to the GSM network in IDLE mode, it is regis-
tered and paging with the BTS in SLEEP mode, too.
Power saving can be chosen at different levels: The
NON-CYCLIC SLEEP mode (AT+CFUN=0) disables the
AT interface. The CYCLIC SLEEP modes AT+CFUN=7
and 9 alternatingly activate and deactivate the AT inter-
faces to allow permanent access to all AT commands.
GSM IDLE
Software is active. Once registered to the GSM network
paging with BTS is carried out. The Terminal is ready to
send and receive.
GSM TALK
Connection between two subscribers is in progress.
Power consumption depends on network coverage indi-
vidual settings, such as DTX off/on, FR/EFR/HR, hop-
ping sequences, antenna.
GPRS IDLE
Terminal is ready for GPRS data transfer, but no data is
currently sent or received. Power consumption depends
on network settings and GPRS configuration (e.g. multi-
slot settings).
GPRS DATA
GPRS data transfer in progress. Power consumption
depends on network settings (e.g. power control level),
uplink / downlink data rates, GPRS configuration (e.g.
used multislot settings) and reduction of maximum out-
put power.
POWER DOWN
Normal shutdown after sending the AT^SMSO command or after activation of the
PD_IN line.
The RTC works continuously, but the software is not active. Interfaces are not
accessible.
