Trellix also offers a TX module type for both the standard and SFP Transceivers. The TX module type is used to connect to twisted pair (copper). With the TX module, the required cable connector type is indeed RJ45 and the maximum distance is that of standard twisted pair (100 meters).
If desired, TX modules can be used to provide the failover connection. This is not traditionally done, however, because the SX modules are less expensive and have a greater maximum distance.
Note
The TX module can only be used at 1000 Mbps: there is currently no option to run the TX module at 10/100 Mbps.