Operating states / led – Siemens TC35 User Manual
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Operating states / LED
Network search
(no SIM card,
no PIN number,
no GSM network)
In the network search state, the TC35 
Terminal searches for a GSM network. All 
the components in the GSM Terminal 
(module) that are not required are shut down 
in several stages by the energy-saving 
software.
This state is reached:
• From the POWER DOWN state: by an
active ignition (on) signal at the power 
supply connection or
• From the TALK or STANDBY state: when
the network is lost (out of range)
Standby
In the STANDBY state, the TC35 Terminal is 
ready to send and receive and registered in 
the network. Paging is performed with the 
GSM network in order to obtain 
synchronisation with the GSM network 
(repetition rate dependent on the 
BSPA_Mutiframe=2...9 parameter). All 
the components that are not required are 
shut down in several stages by the energy-
saving software. Power consumption in this 
state depends on the current network 
availability. 
Talk
In TALK mode a connection has been 
established between two subscribers via 
the GSM network. Power consumption is at 
the maximum and depends on the GSM 
network availability and several connection 
settings (e.g. DTX off/on, FR/EFR/HR, 
hopping sequences and antenna coupling).