NonStop S-Series Server Description Manual (G06.24+)

Glossary
HP NonStop S-Series Server Description Manual—520331-003
Glossary-88
serial communications controller (SCC)
serial communications controller (SCC). A type of communications controller. Each
quad-integrated communications controller (QUICC) has four SCCs to handle the two
Ethernet ports and the two wide area network (WAN) ports.
serial copper. A standard for physical connectivity in ServerNet I and ServerNet II networks
that is available both in HP NonStop™ S-series servers and in Windows NT clusters.
Serial copper uses serial encoding and supports 50 and 125 megabyte/second (MB/s)
speeds. The maximum link distance at 125 MB/s is 25 meters.
serial copper PIC. See serial copper plug-in card (PIC).
serial copper plug-in card (PIC). A plug-in card (PIC) for the modular ServerNet expansion
board (MSEB) and I/O multifunction (IOMF) 2 customer-replaceable unit (CRU) that
supports the serial copper interface. See also serial copper and plug-in card (PIC).
serial maintenance bus (SMB). A bus that connects service processors (SPs) within an
enclosure to each other and to the customer-replaceable units (CRUs) in the group.
serial maintenance bus (SMB) domain. The set of enclosures, modules, field-replaceable
units (FRUs), and customer-replaceable units (CRUs) connected by a common serial
maintenance bus (SMB).
server. (1) An implementation of a system used as a stand-alone system or as a node in an
Expand network. (2) A combination of hardware and software designed to provide
services in response to requests received from clients across a network. For example,
the HP NonStop™ servers provides transaction processing, database access, and
other services. (3) A process or program that provides services to a client or a
requester. Servers are designed to receive request messages from clients or
requesters; perform the desired operations, such as database inquiries or updates,
security verifications, numerical calculations, or data routing to other computer
systems; and return reply messages to the clients or requesters. A server process is a
running instance of a server program.
server application. An application that provides a service to a client application. An
application that provides local execution of remote procedure calls is an example of a
server application.
ServerNet. A communications protocol developed by HP that is used in HP NonStop™
S-series servers. See also ServerNet I and ServerNet II.
ServerNet I. The first-generation ServerNet network. ServerNet I architecture is used in
current HP NonStop™ S-series servers and other products, and it features 50
megabytes/second speed, six-port ServerNet routers, 8b/9b encoding, and a 64-byte
maximum packet size. See also ServerNet II.
ServerNet II. The second-generation ServerNet network. ServerNet II architecture is
backward-compatible with ServerNet I architecture, and it features 125 (or 50)
megabytes/second speed, 12-port ServerNet routers, 8b/9b and 8b/10b (serializer
ready) encoding, and a 512-byte maximum packet size. See also ServerNet I.