Siemens TC35i User Manual download pdf (Page 26)

TC35i Terminal Hardware Interface Description

Confidential / Released

TC35i_T_HD_v01.05 Page 26/37 10.07.2003

3.6.4 SIM interface

The SIM interface is intended for 3V SIM cards in

accordance with GSM 11.12 Phase 2. The card holder is

a five wire interface according to GSM 11.11. A sixth pin

has been added to detect whether or not a SIM card is

inserted.

All signals of the SIM interface are protected from

electrostatic discharge with spark gaps to GND and clamp

diodes to 2.9V and GND.

Removing and inserting the SIM card during operation requires the software to be

reinitialized. Therefore, after reinserting the SIM card it is necessary to restart TC35i

Terminal.

Note: No guarantee can be given, nor any liability accepted, if loss of data is encountered

after removing the SIM card during operation.

Also, no guarantee can be given for properly initializing any SIM card that the user

inserts after having removed a SIM card during operation. In this case, the application

must restart TC35i Terminal.

3.6.5 Status LED

A green LED displays the operating status of the

terminal:

Table 7: Coding of the green status LED

Operating status LED

Power Down off

Not registered to the net (missing SIM, PIN, net) fast blinking

Standby (registered to the net) slow flash (75ms On / 3s Off)

Sleep mode (Power save mode, registered to the net) off

Talk mode on

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Siemens TC35i User Manual Page 26