Operating Characteristics; Operating Modes; Sleep Mode - Quectel LTE-A Series Hardware Design

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Operating Characteristics

3.1. Operating Modes

The table below briefly summarizes the various operating modes of EM121R-GL.
Table 6: Overview of Operating Modes
Mode
Normal Operation Mode
Minimum Functionality
Mode
Airplane Mode

Sleep Mode

Power Down Mode
3.1.1. Sleep mode
In sleep mode, DRX of the module is able to reduce the current consumption to a minimum level, and
DRX cycle index values are broadcasted by the wireless network. The figure below shows the relationship
between the DRX run time and the current consumption in sleep mode. The longer the DRX cycle is, the
lower the current consumption will be.
EM121R-GL Hardware Design
Details
Software is active. The module has registered on the network,
Idle
and it is ready to send and receive data.
Network connected. In this mode, the power consumption is
Talk/Data
decided by network setting and data transfer rate.
AT+CFUN=0 command sets the module to a minimum functionality mode
without removing the power supply. In this mode, both RF function and
(U)SIM card are invalid.
AT+CFUN=4 command or driving W_DISABLE1# pin low will set the
module to airplane mode. In this mode, the RF function is invalid.
The module keeps receiving paging messages, SMS, voice calls and
TCP/UDP data from the network with its current consumption reducing to
the minimal level.
In this mode, the power management unit shuts down the power supply.
Software is inactive, all interfaces are inaccessible, and the operating
voltage (connected to VCC) remains applied.
LTE-A Module Series
EM121R-GL Hardware Design
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