You will need some or all of following parts, depending on the connection type, to set up a connection between your SSA switch and a PC or a VT series terminal:
Using the UTP cable with RJ45 connectors and an RJ45-to-DB9 adapter, you can connect from the RJ45 COM port to a PC running a VT series emulation software package.
Using the UTP cable with RJ45 connectors and an optional RJ45-to-DB25 female adapter, you can connect from the RJ45 COM port to a VT series terminal or VT-type terminals running emulation programs for the VT series.