Alter Aeon Online Help

Keywords are:  'kxwt channel cprefix prefix'

Syntax:
set cprefix <string>
set cprefix NULL

This command allows you to place a prefix of your own in front of channel
sends.  This is primarily used by the blind community to trigger sounds
when channels are active.

See also 'set kxwt' and 'set kprefix' for more client trigger aids.