A Cisco platform, or collection of platforms, such as an AccessPath system, that interfaces between the packet world (such as the Internet) and the circuit-switched world (such as the PSTN).
A device that interfaces telephony circuits to the network, abbreviated as NAS. O - P - Q
The device that accepts PPP connections and places clients on the network that the NAS serves. NAS is also called Terminal server.
A NAS is a piece of equipment that directly accepts users' connections. For example, in a wireless network the device serving as the NAS is the access point. In a dialup network, the NAS is the switch that connects the receiving modems to the computers providing the dialup services (e.g. e-mail and web browsing.)
Also Known As: NAS Definition: A device which answers a PSTN/ISDN call and converts that call to IP traffic.
A Network Access Server (NAS) is a single point of access to a remote resource.