VoIP Analog Telephone Adapter Sip FXS Fxo G.729/G.711/ Ilbc
By Zoom

The economical Zoom Model 5801 Voice over IP Telephone Adapter allow standard analog telephones to make and receive calls over a cable or ADSL Internet connection. Simply plug a conventional or cordless phone into the adapter and then plug the telephone adapter into a broadband connected router or Internet gateway. ... 

Dialogic DMG1008LSW- 8 Port Media Gateway FXO
By Dialogic

The Dialogic 1000 Media Gateway Series (DMG1000 Gateways) allows for a well-planned, phased migration to an IP network, making the gateways a smart solution for enterprises looking to enhance their legacy PBX equipment with new VoIP access and applications. Connected between a PBX or a digital handset and a LAN or WAN, the DMG1000 Gateways convert proprietary digital PBX messages into a format suitable for transmission over standard IP networks. ... 

MultiVOIP 1-Port Adapter (FXS Only) Analog
By MultiTech Systems

The MultiVOIP MVP130-FXS 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-office long distance toll charges. MultiVOIP gateway connect directly to phones, fax machines, key systems, PSTN lines, or a PBX to provide real-time, toll-quality voice connections to any office on your VOIP network. ...