Digi PortServer II, User Manual

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Page 14 Introduction 90030500B
• Each remote location is connected to the PSTN by a PortServer II (see Chapter 9).
• Each remote PortServer II can be configured to call the corporate server, or the
corporate server can call each remote location. Alternatively, the configuration
could allow either location to initiate a connection.
Note: If the remote offices are equipped with “smart” terminals or PCs, a
PortServer II at a remote office can call another remote office.
• The Ethernet ports on the remote PortServer IIs are not used in this configuration.
Note: The Ethernet port may require an IP address assigned to it to provide cor-
rect functionality. The address may be re-used for the WAN connections
(this is sometimes called “unnumbered” IP link operation).
• The remote peripherals are all connected directly to serial ports on the PortServer
IIs.
TIP — Leased Lines
If you are using PortServer II with standard leased lines and synchronous CSUs,
Frame Relay often gives the best results. If you have asynchronous CSUs, PPP may be
the best option. Note that the DCD signal is ignored for asynchronous connections.