OK<CR><LF>
The modem is now ready to be configured.
vTransmission and reception are blocked during Command Mode.
In order to be recognised as the Command Mode instruction rather than data, these conditions must be fulfilled:
vThe RTS line must be set
vNo data must be sent to the modem for at least the time set by register S154
vThe symbol + must be sent three times consecutively immediately following the wait period.
vAgain, no data must be sent to the modem for at least the time set by
ATS154=
vThe next data received by the modem must be <CR><LF> (usually sent from a terminal by keying <enter>)
If any of these conditions is not fulfilled, then the string "+++" will be transmitted as normal data. Note that one or more consecutive “+” characters in the input data will be held in the modem until it is determined that it is not a Command Mode instruction.
Command Syntax
Once in Command Mode, commands are issued by sending a code consisting of several ASCII characters starting with AT and terminated with <enter>. The modem then responds with the characters OK or the information requested, followed by <CR><LF>.
Alternatively, any error is indicated by ERROR<CR><LF>.
For example, the parity type can be set to even using:
ATB1=1<enter>
to which the modem responds
OK<CR><LF>
24 | 1892 1335 - Orion Radio Modem Operating Instructions - v1.3 / Aug 2006 |