Epson TM H6000 - B/W Direct Thermal Technical Reference Manual page 51

TM-H6000II Technical Reference Guide
Connections for usable serial cross cables are as follows:
The type of cable that should be used depends on the operation and the handshake method for
the TM printer. You can operate the TM printer by Windows driver, OPOS, or ESC/POS
commands. XON/XOFF, DTR/DSR, or RTS/CTS are available as handshake controls. See tables
in following sections for the type cable for each connection.
Rev. A System Planning 2-7