AT&T/ Avaya/ Lucent Merlin Legend Control Unit
This is the main control unit for the Legend phone system. The control unit (model 511A) aka main backplane holds the power supply and expansion modules, can be expanded by adding on an expansion backplane. It has a slot for the processor and five additional slots for lines, stations, voicemail, etc. You will get the backplane, cover, side cover, and power cord. Power supplies and expansion modules sold seperately.
AT&T Merlin Legend Phones Click Here
AT&T Merlin Legend Systems & Parts Click Here