Serial Interface Control Commands TRM250

Main Page > TRM Modems > TRM250 > TRM250 Manual > TRM250 AT Commands > Serial Interface Control Commands TRM250

Serial Interface Control Commands

AT&C Set DCD Function Mode

The command controls the behavior of the UE’s DCD line.

AT&D Set DTR Function Mode

The command determines how the UE responds if DTR line is changed from low to high level during data mode.

AT+IFC Set TE-TA Local Data Flow Control

The command determines the flow control behavior of the serial port.

Set TE-TA Control Character Framing

The command determines the serial interface character framing format and parity received by TA from TE.

AT+IPR Set TE-TA Fixed Local Rate

The commandis used to query and set the baud rate of the UART. The default baud rate value (<rate>) is 115200bps. The setting of <rate> will not be restored with AT&F.

AT+QRIR* Restore RI Behaviorto Inactive

If the RI (ring indicator) behavior is "always", it can be restored to inactive by the Execution Command. The RI behavior is controlled by AT+QCFG*. Please refer to AT+QCFG="urc/ri/ring", AT+QCFG="urc/ri/smsincoming", and AT+QCFG="urc/ri/other" for more details.