5.3 ISDN Uses
5.3.3 ISDN SOHO connectivity
A Small Office or Home Office (SOHO) consisting of a few users requires a connection that provides faster, more reliable connectivity than an analog dialup connection. In the configuration shown in the figure, all the users at the remote location have equal access to services located at the corporate office through an ISDN router. This offers to the casual or full-time SOHO sites the capability to connect to the corporate site or the Internet at much higher speeds than are available over phone lines and modems.

SOHO designs typically involve dialup only (SOHO-initiated connections) and can take advantage of emerging address translation technology to simplify design and support. Using these features, the SOHO site can support multiple devices, but appears as a single IP address.

Engineering Journal
  Dial Backup