I have a philosophy and do my best to work by it...
The UC-500 series phone systems were designed for a digital age and digital networks....(Short Answer I guess)
At times we are often asked to fit a triangle into a square, and in doing so we introduce problems and issues that one should not have to deal with, so I have the sales guys now sell the LG-Nortel legacy system instead, YES I hate seeing a Cisco sales fall, but I would rather do that then engage a potential mine field and give us and the Cisco equipment a bad name, simply because it could not do what a simple legacy system can do (Well that is how the customer sees it).
Larger ISR's can take analogue exapnsion systems, and I think in the present environment you only need to be UC Express certified to work with them now, and they are all CLI configured no CCA support.
The SPA-8000 series can be configured to work with the UC-500, its an ok way of doing it but it is not supported and can introduce other problems, especially management ones.
Forget about the 8800 series
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