Any come across any wifi outdoor entry units?

[h2009]

I'm looking for a wifi based SIP phone, which can be screwed to the wall outside.
Has anyone come across a unit?

 

[regfixit]

This unit is compatible with the Siemens S58 DECT SIP/PSTN dual phone range:
http://www.cordless-phones.uk.com/e...eyword=siemens+siemens+gigaset+hc450+intercom