You are bidding on a like-new Sipura SPA-2100, whichis a multi-port, all-in-one Analog telephone and fax machine adapter. It hastwoFXS ports(Analog Telephone Adapter),twoEthernet ports(LAN and WAN) andonepower-supply jack.Sipura SPA-2100supports various protocols includingSIP 2.0, TCP/UDP/IP, RTP/RTCP, HTTP, ICMP, ARP/RARP, DNS, DHCP(both client and server), NTP, TFTP, PPPoE, STUN.. It also supports different codecs:G.711, G.723.1, G.729A/B, G.728, G.726, iLBC, T.38.

Shipping one unit via USPS is only $3.99 !!

I have two more of these units in case you are interested.