CallWave, a provider of internet and voice messaging services, said today that it has sold its virtual fax subscriber base and related intellectual property to Los Angeles-based j2 Global Communications for $12M. Callwave--which started in Santa Barbara, but recently moved its headquarters and executive team to San Francisco--said the move was a part of its review of strategic alternatives. The firm said that the move allows it to divest its non-core assets and focus on its "unified communications" strategy. Callwave's virtual fax business was one of the core pieces of the firm's original business, and offered voicemail and virtual fax services to Internet users. CallWave did not say how the move affects its Santa Barbara operations.