Raveon RV-M7, Technical Manual, Page: 19 / 67

RV-M7 Technical Manual
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pattern occurring in a stream of data entering the modem, there must be a pause in the data stream
before the +++ as well as a pause after the +++ is sent. If either pause is missing, the modem will not
enter the command mode.
Using serial communications software such as HypterTerminal , send the 3-character command
sequence “+++” while observing times of silence before [BT (Silence Before Sequence) Command]
and after [AT (Silence After Sequence) Command] the command characters. The default BT and AT
times are 500mS.
The default sequence for entering into AT Command Mode:
1. No characters sent for ½ a second.
2. Input three (3) plus characters (“+++”) within ½ of a second.
3. No characters sent for ½ a second.
When the M7 modem first enters the Command Mode, it sends the phrase “ M7 ” out it serial port, and
then an “OK” sequence. The “OK” sequence is a sequence of 4 characters:
An “ O ”, “ K ”, < CR >, and < LF > characters
(<CR> = ASCII 0D, <LF> = ASCII 0A)
5.3 Setting a Parameter
To set a parameter in the M7 modem, enter the Command Mode as described above. Then enter the
proper AT command, a space, the parameter, and then a carriage return. For Example, to set the
address of the
M7 modem to 1234, enter the following command:
ATDT 1234 <CR>.