VT100.net: Digital VT102 User Guide

Table 6-9 HDX A Modem Control Signal Summary
Signal | Source | Receive | Transmit
--- | --- | --- | ---
Data terminal ready | From VT102 | On | On
Data set ready | To VT102 | On | On
Request to send | From VT102 | Off | On
Clear to send | To VT102 | Off | On
Receive line signal detector | To VT102 | On | Off
Secondary request to send | From VT102 | On | Off
Secondary receive line signal detector | To VT102 | Off | On