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Expand Configuration and Management Manual (G06.24+)

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Expand Overview
Expand Configuration and Management Manual—523347-008
2-6
X.25 Packet-Switched Networks
X.25 Packet-Switched Networks
X.25 is a standard for private and public networks that use packet-switching
technology. Some examples of packet-switched networks include SPRINTNET,
TELENET, and TYMNET in the United States; DATAPAC in Canada; DATEX in
Germany; TRANSPAC in France; and PSS in Great Britain.
Expand-over-X.25 connections are provided with the HP X.25 Access Method
(X25AM) product. The Expand subsystem uses the NETNAM protocol to communicate
with an X25AM line-handler process.
Systems Network Architecture (SNA) Networks
SNA was developed by IBM for connecting IBM systems and networks. Expand-over-
SNA connections are provided with the HP SNAX/Advanced Peer Networking
(SNAX/APN) product. The Expand subsystem uses the NETNAM protocol to
communicate with the SNAX/APN line-handler process.
Internet Protocol (IP) Networks
An IP network adheres to the Internet Protocol—a computer-industry standard
protocol. An ever-increasing number of public and private networks are based on IP,
including the Internet itself. Expand-over-IP connections are provided by the NonStop
TCP/IP products.
Asynchronous Transfer Mode (ATM) Networks
ATM is a cell-switching and multiplexing technology that combines the benefits of
circuit switching (constant transmission delay and guaranteed capacity) with those of
packet switching (flexibility and efficiency for intermittent traffic). Expand-over-ATM
connections are provided with the ATM subsystem.
Fiber-Optic Cables
A FOX ring consists of two separate, bidirectional, fiber-optic rings and can connect as
many as 14 servers in a limited geographical area. The ServerNet/Fiber eXtension
(ServerNet/FX) adapters allow you to connect a NonStop S-series server to an existing
FOX ring. The existing FOX ring can consist of NonStop K-series and Cyclone
systems.
Note. FOX is an abbreviation for Fiber Optic eXtension. The term FOX ring is used in this
manual to refer to networks that are connected using FOXII, TorusNet, or ServerNet/FX
hardware.