Company Confidential
10
Raveon Technologies Corp.
4.3. Setting a Parameter
To set a parameter in the
M8S
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
M8S
modem to 1234, enter the following command:
ATDT 1234
<CR>
Once a Parameter is changed, the modem will begin using the new
parameter and the new parameter is saved to non-volatile.
4.4. Reading a Parameter
To read the value of a particular setting, issue the command, with no
parameter. The modem will return the value followed by an “OK”. The
modem’s OK response is:
The value in ASCII decimal format.
A <CR> <LF> (<CD> = ASCII 0D, <LF> = ASCII 0A).
An “O”, “K”, <CR>, and <LF> sequence.
For example, if the user enters the command to read the
M8
’s
modem
address and its address was 1234, the user would issue the following
command:
ATDT
<cr>
and the modem will respond with:
1234
<
CR
> <
LF
>
OK
<
CR
> <
LF
>
To get on-line help with a command, enter the command and put a question
mark in for the parameter. For example, to see what the ATDT command is
for, type:
ATDT ?
The modem will respond by listing a brief description of the command. To
see a list of all commands, type
HELP
.
Many commands support the “
MIN
” and “
MAX
” parameters to read the
minimum and maximum allowable settings. For example, type
ATJF MAX
to
find the maximum value the CTS negation threshold may be set to.
4.5. CONFIG Button
If certain parameters within the modem are modified in a manner that causes
the modem to cease functioning or if the user cannot enter the command
mode via the “+++” method described above, there is a small push button
internal to the
M8S
modem to assist in this case. This CONFIG button may
be pressed at any time, and forces the modem into a known operational state.
The CONFIG button is located inside the modem. Remove the rear cover,
