Fit - dte inactivity timeout, Syntax, Defined values – Comtrol AT Commands User Manual
Page 172: Reporting current or selected values, Reporting supported range of parameter values

AT Commands for CX81801/CX06833/CX81300/CX06827 Modems Reference Manual
Conexant
102184B
4-18
+FMI? - Request Manufacturer Identification
This command causes the modem to report the modem product manufacturer.
Syntax
+FMI?
Typical Response
CONEXANT
OK
+FMM? - Request Model Identification
This command causes the modem to report the modem product model.
Syntax
+FMM?
Typical Response
V90
OK
+FMR? - Request Revision Identification
This command causes the modem to transmit one or more lines of information text
identifying the modem version, revision level or date.
Syntax
+FMR?
Typical Response
V3.001-V90_2M_DLS
OK