User Manual

Response
Reason
Action
OK
The power save is now active
ERROR
some error occurred
Enable extended result codes
(see par. 4.4.2.1), and retry.
+CME ERROR: 4
operation not supported
Check command syntax and <fun>
value.
Power Saving Mode means that Device is in sleep mode with disabling the interface
(UART/USB).
UE910 V2 FAMILY AND UC864-E V2 makes it possible for DTE to receive the event such
as incoming call/SMS/data while both DTE and Modem are in sleep mode with disabling all
serial interfaces.
DTE must require below specification to achieve the reduction of power consumption.
 DSR/DTR/RTS/CTS/RI Pin control on Main UART port.
 DSR/DTR/RTS/CTS Pin emulation on Telit USB Modem port.
If DTE satisfies above requirement, UE910 V2 FAMILY AND UC864-E V2 can provide the
functionalities:
 Keep URC message.
 Keep Incoming data during data mode, until DTE wake up from sleep mode.
 UE910 V2 FAMILY AND UC864-E V2 helps DTE to reduce their power
consumption using below rules.
 Use RI on Main UART to wake up DTE from sleep mode. (DTE must always
monitor RI pin during power saving mode).
 Use DTR on Main UART to place Modem in sleep mode or wake up Modem
from sleep mode.
 Use RTS on Main UART to control the flow from Modem to DTE (Optional).
(Hardware flow control (+IFC=2,2) must be used in power saving mode).