Draytek Vigor 2600Vi

Draytek Vigor 2600Vi ... existing broadband capacity to carry regular voice calls to suitably equipped remote sites, for example another Vigor2600V router. The Vigor2600V also has enhanced VPN capacity and Internet content filtering and versions will be available with an ISDN interface or a built-in 802.11g wireless access point.

The voice calls (speech) are compressed in real time to make maximum use of the bandwidth, similar to the way that an MP3 audio file contains compressed sound, and other internet activities (e.g. web browsing) run simultaneously with the VOIP calls.