So,
TRANS/PGM *#
TRANS/PGM 01
Press Flex Key 1
Now you should see the top row displaying ports and the bottom row showing the extension number associated to that port.
Theres 4 extension numbers on the display and flex key 1 relates to the first one, flex key 2 relates to the second one etc.
Press volume down to go to the next lot of 4 extensions if you need to.
Find 200 and 201 (Displayed on the bottom of the screen).
Press the flex key that relates to 200 and press speed. Should now display 3 dots.
Press the flex key that relates to 201 and dial 200.
Press Hold/Save
Press the flex key that RELATED to 200 and dial 201
Press Hold/Save
Press Monitor or Speaker depending on type of handset.
Ok, Press Trans *#..... TRANS/PGM..... the transfer key?.......sigh!