Video Attribute Code Sequence

During a T27 session, the host can send codes to control character attributes.

T27 supports the following codes:

Table 56

Sequence	Operation
CAN	Inserts a blinking video attribute at the Datacomm pointer (DCP) and moves the cursor one column to the right.
EM	Starts secure video.
SC 3	Starts underline video.
ESC, 4	Starts reverse video.
SUB	Starts bright video.
ESC, N	Activates reverse video.
ESC, O	Activates normal video.
ETB	Ends video attributes.