HUAWEI ME909u-523 LTE LGA Module
Application Guide
LED Indication Application Scenarios
Issue 04 (2014-12-08)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
83
13
LED Indication Application Scenarios
13.1 Overview
Light Emitting Diode (LED) indicates the MT's current state. Table 13-1 shows the
HUAWEI default LED program, including LED mode to different states.
Table 13-1
HUAWEI default LED program
LED Mode
Service State
Permanently off
Off line
100 ms on/100ms off/100 ms on/1700ms off
Power on Initialization
100 ms on/100ms off/100 ms on/1700ms off
Register fail and no service
100 ms on/100ms off/100 ms on/1700ms off
Connect to no service area
100 ms on/1900ms off
Register on WCDMA
Permanently on
Connect on WCDMA
Permanently on
Transmit data on WCDMA
Permanently on
Connect on HSPA
Permanently on
Transmit on HSPA
100 ms on/1900ms off
Register on LTE
Permanently on
Connect on LTE
Permanently on
Transmit data on LTE
NOTE
LED ON indicates LED GPIO High and LED OFF indicates LED GPIO Low.