Labels:text | diagram | screenshot OCR: LAN DIAL-OUT ROUTER SOLUTIONS Third party software NOS routing software LAN hub ISDN adapter card) ISDN File server LAN hab Router LAN adaptors Client software EIN adapters for on-line access Client software for on-line access Clients Cilents ISDN Internal Router Extomal Router Figure 1. In a file-server-based ISDN router solution (on the left) network clients access ISDN through the file server's ISDN adapter card. An external router (such as the one on the right; provides, for example, one Ethernet port and one ISDN port; clients connect to the router via the Ethernet hub.