TelephoneStuff.com MultiTech Systems Single FXS Gateway with PSTN Failover MVP130-FXS

A voice over IP provides toll-free voice and fax communications over the Internet or Intranet. Features: - Up to 60 ports per chassis for communication over an existing IP network or the Internet - Ethernet connectivity and full IP compatibility with existing routers and WAN infrastructure - FXS/FXO, and E&M; connectors on each channel for direct analog connection to phones, key telephones, PBX extensions, PSTN lines or PBX trunks (2-, 4-, and 8-port models only) - Digital MultiVOIP connects directly to PBX or PSTN line via BRI, T1/E1 or PRI - PSTN fail-over automatically routes calls over the PSTN network if the IP network is congested or down - Supports H.323 or SIP for sending voice over the Internet - Supports H.450 supplementary services to provide for call transfer, call forwarding, call hold, call waiting and name identification - Voice compression to 5.3K per call with support for multiple algorithms, including ITU G.723 and G.729 - T.38 real-time fax relay for interoperability among other VOIP equipment - Voice prioritization using the industry-standard Differentiated Services (DiffServ) protocol - Configuration and management using a web browser or Windows