Standard Server

When an incoming call is accepted, a PIB is allocated dynamically to the new process from a range defined in using the Number of PIBs value in the PIB Configurations tab of the D3 Device Manager (default 1 to maximum number of PIBs -1). This mode of operation is suitable for applications that do not depend on the PIB number they are running on. To disable the standard mode, set the Number of PIBs value to -1.

Nailed Server

A predefined, nonstandard TCP port number is associated, or nailed, to a given PIB. When a client requires a connection to a predetermined PIB, it must specify the TCP port number, from 1024 to 32767, during the connection. Most Telnet clients allow specifying an option. For example, UNIX Telnet clients allow the form telnet host port and the Windows Telnet client allows specifying a port in the Connect > Remote dialog box.

To associate PIBs and Ports, see the dev-make TCL command or the D3 Device Manager section of the D3 System Administration Guide for more information.

Nailed Client

In this mode, the VME acts as a client to a Telnet server running on another system. A host name and TCP port are associated, or nailed, to a given PIB. When such a process is started, it establishes a Telnet connection to the specified server. This mechanism can be used on some terminal servers, allowing automatic connection of a serial terminal through a network (see dev-make TCL command).

NOTE

• The Telnet server does not recognize urgent data, meaning that a Telnet client that sends such data when trying to send a Break does not work. To send a Break, specify a BreakChar entry in the D3 Settings tab of the D3 Device Manager (see the D3 System Administration Guide for more information).

• A Telnet client disconnects using the exit or disconnect TCL command by closing the Telnet session or by issuing from another port the dev-remov TCL command.