The AudioCodes Mediant 1000 Multi-Service Business Gateway has been certified as interoperable with Skype for SIP.
Certification testing of Skype for SIP with the AudioCodes Mediant 1000 Multi-Service Business Gateway was conducted by tekVizion Labs, an independent test facility in Richardson, Texas, which specializes in IP communications interoperability testing.
http://www.skype.com/business/products/pbx-systems/siphttp://www.audiocodes.com/msbg