Interphase Tech iSPAN - Manual (Page 28)

Software Overview
8 Interphase Corporation
Point-to-Point and Multipoint Connections
The iSPAN-Serial WAN adapter supports point-to-point and
point-to-multipoint connections. The following figure shows a
point-to-point connection over dedicated leased lines.
Figure 1-3. Point-to-Point Connection
The following figure illustrates a point-to-multipoint
connection across a Frame Relay or X.25 network.
Figure 1-4. Point-to-Multipoint Connections