Good point...Not sure. Subscriber station Call Directors used that method, but some PBX consoles didn't. It depended upon the number of lamps, etc., in the DSS fields.
Call Directors used one finger per strip of 6 keys, so only 20 pairs were needed in that application, but PBX consoles used more pairs, for features such as the trunk keys, with two supervisory lamps per key.
I'll see if I can dig out some BSP's for PBX consoles and take a look.
Last edited by Arthur P. Bloom; 10/08/12 02:07 PM.
