Hi Dave, I wasn’t disparaging BIX, only pointing out that despite a popular misconception, that for the past 10-15 years or so, 66-blocks are compliant for Cat.5 and higher, data networks. They were upgraded, much as BIX and other systems were, when higher-speed networks were being introduced.
As I stated, I prefer a more compact solution for data networks, such as the Western Electric 110 system, even though, like BIX, they are more expensive.
I continue to use 66-blocks for voice since they are more economical and much more versatile when additional flexibility is needed for complex voice networks. In our part of the woods, 66-blocks were used even with Nortel key systems such as the venerable Norstar 616.
As far as Nortel specifying only BIX being used in conjunction with Norstar installations, I am certain the specification originated in the sales and not the engineering department since the key system could care less about whether BIX, 110, 66, Krone, or even screw terminals were being used.
Of course, a Category 5e or higher wiring system is always a good idea, since it could be used when the day comes that a VoiP system replaces the old key system.