Specifications

UC864-E/G AT Commands Reference Guide
80304ST10041a Rev. 3 - 18/07/08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 43 of 259
3.5.3.2.10 Data Set Ready (DSR) Control - &S
&S - Data Set Ready (DSR) Control
AT&S[<n>] Set command controls the RS232 DSR pin behaviour.
Parameter:
<n>
0 - always High
1 - follows the GSM traffic channel indication.
2 - High when connected
3 - High when device is ready to receive commands (factory default).
Note: if option 1 is selected then DSR is tied High when the device receives
from the network the UMTS traffic channel indication.
Note: in power saving mode the DSR pin is always tied Low & USB_VBUS
pin is always tied Low.
Note: if parameter is omitted, the command has the same behaviour of
AT&S0
3.5.3.2.11 Ring (RI) Control - \R
\R - Ring (RI) Control
AT\R[<n>] Set command controls the RING output pin behaviour.
Parameter:
<n>
0 - RING on during ringing and further connection
1 - RING on during ringing (factory default)
2 - RING follows the ring signal
Note: to check the ring option status use the &V command.
Note: if parameter is omitted, the command has the same behaviour of
AT\R0
3.5.3.2.12 Fixed DTE Interface Rate - +IPR
+IPR - Fixed DTE Interface Rate
AT+IPR=<rate> Set command specifies the DTE speed (UART only) at which the device
accepts commands during command mode operations; it may be used to fix
the DTE-DCE interface speed.
NOTE : DTE speed of USB port is always 0. DTE speed of USB does not
change.