### Digi DB-9 Connector Pin Assignments

Signal | Description | DTE Use | Pin #
--- | --- | --- | ---
GND | Chassis Ground | N/A | Shell
DCD | Data Carrier Detect | Input | 1
RxD | Received Data | Input | 2
TxD | Transmitted Data | Output | 3
DTR | Data Terminal Ready | Output | 4
SG | Signal Ground | reference | 5
DSR | Data Set Ready | Input | 6
RTS | Request to Send | Output | 7
CTS | Clear to Send | Input | 8
RI | Ring Indicator | Input | 9