Expand Configuration and Management Manual (G06.24+)

Configuring Expand-Over-X.25 Lines
Expand Configuration and Management Manual—523347-008
10-3
X25AM Line-Handler Process
X25AM Line-Handler Process
The Expand-over-X.25 line-handler process uses the services of an X25AM
line-handler process to provide access to X.25 packet-switched data networks
(PSDNs). Each X25AM line-handler process controls a single data communications
line and supports both permanent virtual circuits (PVCs) and switched virtual circuits
(SVCs). The X25AM line-handler process associated with the Expand-over-X.25
line-handler process must be configured and started before the Expand-over-X.25
line-handler process can begin exchanging data over an X.25 connection.
For information about configuring X25AM line-handler processes, refer to the X25AM
Configuration and Management Manual.
QIO Subsystem
QIO is a mechanism for transferring data between processes through a shared
memory segment. The QIO subsystem is preconfigured and started during the system
load sequence. The QIO subsystem must be started and running before Expand
line-handler processes can be started.
For information about the QIO subsystem, refer to the QIO Configuration and
Management Manual.
Wide Area Network (WAN) Shared Driver
The WAN shared driver is a set of library procedures that is bound with each input-
output process (IOP) that uses a ServerNet wide area network (SWAN) concentrator.
The WAN shared driver is a component of the WAN subsystem. The WAN subsystem
is preconfigured and started during the system load sequence.
For information about the WAN subsystem, refer to the WAN Subsystem Configuration
and Management Manual.
NonStop TCP/IP Process
The NonStop TCP/IP subsystem provides TCP/IP data communications connectivity.
NonStop TCP/IP processes are used by the following LAN adapters: Ethernet 4
ServerNet adapters (E4SAs), Fast Ethernet ServerNet adapters (FESAs), Gigabit
Ethernet ServerNet adapters (GESAs), Gigabit Ethernet 4-port ServerNet adapters
(G4SAs), and SWAN concentrators. The NonStop TCP/IP processes that support the
E4SAs, FESAs, GESAs, G4SAs, and SWAN concentrators are preconfigured and
started during the system load sequence.
For information about the NonStop TCP/IP, Parallel Library TCP/IP, and NonStop
TCP/IPv6 subsystems, refer to the TCP/IPv6 Configuration and Management Manual,
Note. You must obtain a subscription to an X.25 value-added network (VAN) or have access to
a dedicated X.25 network, to use an X.25 connection.