trying to use AT&T VFD display module

I salvaged several AT&T/Lucent/Avaya D401A Digital Display Modules, apparently from a Definity phone system. The label says D401A AT&T 89338 series 1 The module has 8 touch-buttons and LEDS and an Itron DC 405A2 VFD (one line of 40 characters, each char a 5x7 matrix) I'd like to use the entire module since it has a microcontroller and power supply, but I have no clue as to the interface. Any help would be appreciated, starting with pinout. I really need the internal programming document with all the commands :-( I'm trying to strike a balance between researching the device to use completely "as is" vs. salvaging entire assemblies vs. salvaging just bare parts. Sometimes it's easier to just redesign it and salvage as many subassemblies as possible than taking the time to reverse engineer the entire gadget :-( Googling around found: "This digital display module ... adds a large easy to read 40 character display to the top of the 7405D or 7434D voice terminals. AT&T/Lucent systems compatible with this module are Definity G1, G2, G3, ECS and ..." Thanks in advance -- Jeffrey Jonas jeffj-at-panix-dot-com