BGS3 Hardware Interface Description
3.1 Operating Modes
63
BGS3_HD_v01.000d
Page 23 of 109
2010-03-26
Confidential / Released
3.1
Operating Modes
The table below briefly summarizes the various operating modes referred to in the following
chapters.
for the various options proceeding from one mode to another.
Table 7:
Overview of operating modes
Normal operation 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 sav-
ing 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 perma-
nent 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 set-
tings, such as DTX off/on, FR/EFR/HR, hopping
sequences, antenna.
GPRS IDLE
Module is ready for GPRS data transfer, but no data is cur-
rently sent or received. Power consumption depends on
network settings and GPRS configuration (e.g. multislot set-
tings).
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 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.
Charge-only
mode
Limited operation for battery powered applications. Enables charging while module
is detached from GSM network. Limited number of AT commands is accessible.
Charge-only mode applies when the charger is connected if the module was pow-
ered down with AT^SMSO.
Charge mode
during normal
operation
Normal operation (SLEEP, IDLE, TALK, GPRS IDLE, GPRS DATA) and charging
running in parallel. Charge mode changes to Charge-only mode when the module
is powered down before charging has been completed.
