Wireless ATA supports two concurrent VoIP calls

Taiwan – Model VIP-161SW from Planet Technology Corp. is a wireless analog telephone adapter (ATA) that uses QoS to ensure voice quality, and offers access point (AP and AP-client), router (NAT, static, virtual and DMZ) and VoIP DSP functionality, allowing users to make calls via SIP, as well as share IPs.
The device is built in with two Ethernet interfaces for Internet (PPPoE, DHCP or fixed IP) or office LAN connectivity, capable of supporting two concurrent VoIP calls, as well as fax transmission-over-Internet protocol (FoIP). It supports three-way conferencing, call wait/forward/transfer/hold/resume/screen and caller ID functions, as well as VAD, CNG, dynamic jitter buffer and G.168~2000 echo cancellation.
The IEEE802.11b/g-compliant device has 54Mbps data transmission speed, and is compatible with G.711, G.729 AB, G.723 and G.276 voice codices; T.38 (G.711 fax pass-through); and in-band/out-of-band DTMF relay (RFC 2833).
Source: globalsources.com