User's Manual

AC65/AC75 Hardware Interface Description
Confidential / Preliminary
s
AC65/AC75_hd_v00.372 Page 24 of 118 2006-08-03
3.1 Operating Modes
The table below briefly summarizes the various operating modes referred to in the following
chapters.
Table 5: Overview of operating modes
GSM / GPRS SLEEP Various power save modes set with AT+CFUN
command.
Software is active to minimum extent. If the module was
registered to the GSM network in IDLE mode, it is
registered 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 interfaces 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 module is
ready to send and receive.
GSM TALK Connection between two subscribers is in progress.
Power consumption depends on network coverage
individual settings, such as DTX off/on, FR/EFR/HR,
hopping sequences, antenna.
GPRS IDLE
EGPRS IDLE
Module is ready for GPRS/EGPRS data transfer, but no
data is currently sent or received. Power consumption
depends on network settings and GPRS/EGPRS
configuration (e.g. multislot settings).
Normal operation
GPRS DATA
EGPRS DATA
GPRS/EGPRS 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 output power.
POWER DOWN Normal shutdown after sending the AT^SMSO command.
Only a voltage regulator is active for powering the RTC. Software is not active.
Interfaces are not accessible. Operating voltage (connected to BATT+) remains
applied.