Same reason I don't burn cow pies in my fireplace.
Love that!
I agree about the SDS and central admin. Also loose resiliency.
But... When in a competitive situation where your choice is to sell a less optimal system or loose the sale completely it better to have options.
My next steps are to figure out what does or doesn't work
So Far:
Caller ID: ok
MOH - OK
MOH on transfer - OK
Still needing to check:
Conf calls - two SIP trunks
SIP to SIP xfer - without tromboning.
Centralized VM with message waiting.
Ralph