The MultiVOIP 210-FX SIP gateway provides toll-free voice and fax communications over the Internet or Intranet.By integrating voice and fax into your existing data network, you can realize substantial savings on inter-officelong distance toll charges. The MultiVOIP 210-FX gateway is available in 2-port model. It connects directly tophones, fax machines, key systems, PSTN lines, or a PBX to provide real-time, toll-quality voice connections to anyoffice on your VOIP network. The MultiVOIP 210-FX gateway is designed to maximize the investments you've alreadymade in your data and voice network infrastructure.