We are offering voip-fxs adaptors. Setu ata1s and ata2s are analog telephony adaptors with fxs ports to connect analog telephone instruments, multiple sip accounts to register with voip carriers (itsps) and ethernet ports to connect ip network. make and receive calls over internetaccess telephony features like call hold, call toggle, conference and many morebinds with stand-alone application and with any existing pbxprovides web based interface for ease of management