<SNIP>
IP phones are nice, I'll give them that... but they are also a pain in the ass if you're upgrading/retrofiting an office, and they also don't play well together -- you're more or less stuck using one brand of POE switch with one brand of IP phone, or you use wall-warts. ADSI phones "feel" much more phone-like to me, even though IP Phones can do some wild things.
Andrew,
If I read above correctly, you imply that ADSI phones don't need wall-warts (A/C power transformers that plug into the wall). I'd assume that based on the sizable LCD screen, potential back-lighting, microcontroller(s), etc, that an ADSI phone would have to have a wall-wart, especially if you wanted to use any of its functionality while it is on-hook. I have designed a phone or two in my past (many years ago) and, as I recall, there is almost *no* current available from the telco while a phone is on-hook. You might be able to trickle-charge a very small battery, or run an RCA 1802 processor (microamps), but that's about it.
Did I read your statement correctly, or do ADSI phones truly require wall-warts (as do SIP phones)?
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