Panasonic KX-TDA5480 ***REFURBISHED*** 4-Channel VoIP Gateway Card IP-GW4Good ConditionVoIP Gateway Card (IPGW4)Supports up to 4 IP connections for networking the KX-TDA50 to other KX-TDA systemsH.323V.2, ITU-T, G729a, G.723.1 and G711 compliantCapacity: 1 per systemUse with TDA50G system..