Solution:
Manually edit the SX/Speed printcap file.
SX = /etc/printcap.si
Speed4/Ultraport = /etc/printcap.spd
If you are just adding a terminal type (for usage with setting the term type for a login eg /etc/ttytype entry) then you do not require to add the transparent print characters.
example:
ansi ^X ^T
ansic ^X ^T
ansice \e[5i \e[4i
wy50 \ed# ^T
wy60 \ed# ^T
wy120 \ed# ^T
vt220 \e[5i \e[4i
tvi925 \e` \ea
wspc65 \e[5i \e[4i
unknown \ed# ^T
# manual entries to file for SCO /etc/ttytype entry
vt100
If you are using transparent printing then you are required to add the XPON and XPOFF control characters to the entry. See your terminal manual for these characters.