line_control <plnum> [<page=>];
lctl
SDC Function - code x'83'
Tells the ADSI phone which page and line number from the abstract ADSI telephone virtual display should be displayed on the topmost scrollable line of the real ADSI-phone display.
There must not be a space between the word page and the equals (=) sign.
TR-NWT-001273.
No parameter substitutions are possible with this statement.
line_control 3 page=c;