Primary RS-232 Serial Interface

The primary RS-232 serial communication line connector is an RJ-11 modular jack, CablesNMor T23750. The plug is a standard RJ-11 phone plug, such as a Jameco 115617CH. This port is used as the serial console port and can also be accessed by GPL procedures as device /dev/com1. See Figure 7-24 and Table 7-15

Figure 7-24: Port and Cable

Table 7-15: Pinout
Pin	Description
1	CTS - clear to send
2	RTS - ready to receive
3	Ground
4	RXD - controller receive data
5	TXD - controller transmit data
6	Not Connected
User Plug Part No	RJ-11 phone plug