Quartel IP handsets

Just spotted these on eBay:

http://cgi.ebay.co.uk/Brand-New-Seal...P-NETWORK-SIP-
PHONE_W0QQitemZ150266332064QQ

but I'm damned if I can find any reviews of them, or firmware releases on
the manufacturer's site [very reluctant to but a handset that's had no
firmware updates]. Look very similar to Aastra/Nortel handsets,
presumably because they've been made in the same factory. Supports IAX as
well. Anyone know anything else about them?

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Convergence, n: The act of using separate DSL circuits for voice and data