Siemens MC35 Specifications download pdf (Page 29)

MC35i Terminal Hardware Interface Description

Confidential / Released

MC35i_T_HD_v02.00a Page 29 of 42 16.02.2007

3.5.6 Status LED

A green LED displays the operating status of the

terminal:

The LED is driven by the SYNC line of the integrated MC35i module which can be

configured by using the AT^SSYNC command. For the purpose of the MC35i Terminal it is

recommended to retain the default setting of AT^SSYNC=1 (AT^SSYNC=0 switches the

LED off).

The following table lists the possible LED patterns and describes the operating status of the

MC35i Terminal indicated by each pattern if AT^SSYNC=1.

During the transition from one LED pattern to another the "on" and/or "off" periods of the

LED may vary in length. This is because an event that triggers the change may occur any

time and, thus, truncate the current LED pattern at any point.

Table 13: Coding of the green status LED

LED mode

Operating status of MC35i Terminal

Permanently off

MC35i Terminal is in one of the following modes:

• POWER DOWN mode

• ALARM mode

• NON-CYCLIC SLEEP mode

• CYCLIC SLEEP mode with no temporary wake-up event

progress.

600 ms on / 600 ms off

Limited Network Service: No SIM card inserted or no PIN entered, or

network search in progress, or ongoing user authentication, or network

75 ms on / 3 s off

IDLE mode: The mobile is logged to the network (monitoring control

channels and user interactions). No call in progress.

75 ms on / 75 ms off /

75 ms on / 3 s off

One or more GPRS contexts activated.

500 ms on / 25 ms off

Packet switched data transfer in progress.

Permanently on

Depending on type of call:

Voice call: Connected to remote party.

CSD call: Connected to remote party or exchange of parameters while

setting up or disconnecting a call.

When a temporary wake-up event (for example URC, call, packet switched transfer) occurs in

CYCLIC SLEEP mode the LED flashes. See Chapter AT+CFUN provided in [1] for details on the

various SLEEP modes and wake-up events.

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