User Manual

UE910 V2 FAMILY AND UC864-E V2 provides the option to allow DTE to enter sleep
mode with the maintenance of data connection.
Above Figure 3.2-1 illustrates the action flow to achieve this purpose.
This option is applied only to PS Data Service. (Not support for the service such as CS Data
and FAX).
We recommend that DTE must wake up from sleep mode and get incoming data as soon as
possible. Network operators have their own inactivation timer for data transmission.
If DTE doesn’t wake up from sleep mode even though RI signal is activated, the data
connection may be disconnected by network.
DTE can wake up from sleep mode by monitoring RI pin, while it‘s in sleep mode. UE910 V2
FAMILY AND UC864-E V2 provides different RI signal type to DTE, according to the
specific event.
This paragraph deals with the following items:
 RI Signal for incoming call
 RI Signal for incoming SMS
 RI Signal for socket listen during server mode
 RI Signal for URC message and incoming data during power saving mode
RI signal for incoming call has different signal in accordance with the value of \R and RING
message is sent to DTE the instance RI signal is going to is activated, periodically.
In case the value of \R is 0 or 1, RI signal and RING message like as figure 4.3 is generated.
In case the value of \R is 2, RI signal and RING message is generated like as Figure 4.4.
1000ms
RING
4000ms
RING
1000ms
4000ms
Figure 4.3 RI signal for \R0 or \R1