User Manual

Note: In case both +CNMI=3,1 and #E2SMSRI=<x> is issued, RI signal behavior by
#E2SMSRI is ignored by +CNMI
RI Signal is generated, when modem receive TCP connection request from remote client
during socket server mode. This signal is the negative going pulse and is generated, one time.
RI Signal for URC message and incoming data is generated, only when modem is in power
saving mode. #PSMRI must be set as the value is not 0 and AT#CFLO=1 must be issued.
DTE issue AT+CFUN=5 and Drop DTR pin on main UART to place modem in the power
saving mode.
Note: if RI signal for Incoming Call, SMS, Socket Listen and #PSMRI are generated at the
same time in power saving mode, RI signal for #PSMRI will be ignored.
#E2SMSRI value
(50 ~11500 ms)
Figure 4.6 RI Signal for #E2SMSRI
#E2SLRI value
(50 ~11500 ms)
Figure 4.7 RI Signal for #E2SLRI
#PSMRI value
(50 ~11500 ms)
Figure 4.8 RI Signal for #PSMRI