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Page 12
Chapter 2: Overview
Table 2-2. RS-232 diagnostic port pinout.
Signal Name
Pin Number Input or Output
DCD
—
RXD
2
O
TXD
3
I
DTR
—
SG
5
DSR
—
RTS
—
CTS
—
Data Port (RS-232 Port DCE)
The DATA (RS-232 Port (DCE) on the rear of the circuit board is used for:
• RS-232 serial data (300-230, 400 bps) when in DATA MODE, or
• for configuring the modem when in COMMAND MODE.
Table 2-3. RS-232 data port pinout.
Signal Name
Pin Number Input or Output
DCD
1
O
RXD
2
O
TXD
3
I
DTR
4
I
SG
5
—
DSR
6
O
RTS
7
I
CTS
8
O
RING
9
O
