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nerdvittles.com/?p=207I tend to agree with the assesment of Cisco and SIP in that article. I have a 7911 that I picked up to try out as they're cheap on ebay. I don't recall having any issue flashing it to SIP from MGCP but it was a real pain to get a working XML template for the thing to sort of work with Asterisk. Polycom is a lot easier to work with and build/sound quality is on par with Cisco.