Specifications

Modem Basics
Result code framing
Every command will return a result code unless the Quiet
command is enabled. If Quiet is on (
ATQ1, see page 102) then
neither framing characters nor result code is returned.
A leading <CR><LF> is inserted ahead of the result code if
Verbose is on (
ATV1, see page 102). Otherwise there are no
leading characters prior to the ASCII numeral result. The result
code is always followed by a
<CR>. There is a trailing <LF>
only if Verbose is on. For example, the result code
OK appears
as:
• <CR><LF>OK<CR><LF>
if verbose is on (ATV1)
• 0<CR>
if verbose is off (ATV0)
When ATV1 is set and there is an error,
<CR><LF>ERROR<CR><LF> is sent to the host computer and no
subsequent commands in the command line are processed. If
ATV0 is set, result code 4<CR> is sent instead.
The ERROR (or 4) response may be replaced by +CME ERROR:
<err>
when the command is not processed because of a GSM
radio connection error.
GPS data format
The MP 700 Series GPS sends GPS data out in UDP packets.
The packets contain either:
• TAIP or NMEA messages
• Data packets framed according to a Sierra Wireless
protocol called RNAP (Remote Network Access Protocol).
RNAP is described in detail in the Software Installation, Configu-
ration, and Integration Guide on the CD that is shipped with the
MP 750 GPS.
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