Siemens TC35i User Manual download pdf (Page 16)

TC35i Terminal Hardware Interface Description

Confidential / Released

TC35i_T_HD_v01.05 Page 16/37 10.07.2003

3.4 Operating modes

The table below briefly summarizes the various operating modes referred to in the following

chapters.

Table 3: Overview of operating modes

Mode Function

SLEEP Various power saving modes set by AT+CFUN

command.

Software is active to minimum extent. If the Terminal

was registered to the GSM network in IDLE mode, it

remains, in SLEEP mode, registered and pageable

from the BTS.

Power saving can be chosen at different levels. The

NON-CYCLIC SLEEP mode (AT+CFUN=0) disables

the AT interface. The CYCLIC SLEEP mode

AT+CFUN=5, 6, 7 and 8 alternatingly activate and

deactivate the AT interface to allow permanent

access to all AT commands.

IDLE Software is active. Once registered to the GSM

network, paging with BTS is carried out. The

Terminal is ready to send and receive.

Normal operation

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.

Power Down Operating voltage applied. Only a voltage regulator in the Power Supply ASIC

is active for powering the RTC. Software is not active. The RS-232 interface

is not accessible.

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Siemens TC35i User Manual Page 16