1.9
RS-232 SERIAL PORT INTEGRATION PARAMETERS
Table 8 provides the serial cable design information to integrate the Vanguard modem into your system. Table 9 gives
the default RS-232 communication parameters.
Table 8 Standard RS-232 DE-9 Pinout
Pin Name Direction Description
1
CD
←
Carrier Detect
2
RX
←
Receive Data
3
TX
→
Transmit Data
4
DTR
→
Data Terminal Ready
5
GND
System Ground
6
DSR
←
Data Set Ready
7
RTS
→
Request to Send
8
CTS
←
Clear to Send
9
RI
←
Ring Indicator
(tied to + 5 V DC in
the Vanguard 3000)
Note:
Direction is DTE relative DCE
Table 9 Default RS-232 Communications Parameters
Parameter
Value
Bits Per Second
115,200
Data Bits
8
Parity
None
Stop Bits
1
Flow Control
None
Figure 10 DE-9 Connectors
1
1
5
5
6
9
9
6
Male
Female
1.9.1
ODP (OPEN DEVELOPERS PLATFORM) OVER RS-232
This device includes the Open Developers Platform (ODP), which permits customers to develop their own Linux based
applications which run on the modem’s ARM9 processor. The customer’s application can utilize the external RS-232
port, the external I/O port, and/or an internal 3 pin (GND, RXD, TXD) RS-232 port and is able to transfer data over the
cellular WAN using the Linux socket libraries. The Vanguard firmware also supports an API that allows the customer’s
application to access diagnostic data from the cell module such as connection status and RSSI. More information and
support is provided by CalAmp’s Applications Engineering organization.
Vanguard 3000 Series Multicarrier Cellular Data Modem & IP Router PN 001-7300-100 Rev. B
| Page 9
