HD Voice Service offers transcoding feature.

XConnect    London,
Aug 31, 2011 For members of XConnect's HD Alliance, transcoding technology delivers effective voice communications by enabling fixed-line and mobile operators to seamlessly exchange HD voice traffic through IP-peering federation. Feature bridges disparate HD islands by enabling transcoding in XConnect multimedia interconnection hub. HD voice traffic can be delivered with tonal and audio quality preserved between fixed operators using G.722 codec and mobile operators using AMR-WB codec.