ZyXEL Communications Prestige 941 User Manual page 92

Prestige 941 Cable Router
Server: A computer or a software package that provides a specific kind of service to the client software
running on other computers.
SID (Service ID): Used in the DOCSIS standard to define a particular mapping between a cable modem
(CM) and the CMTS. The SID is used for the purpose of upstream bandwidth allocation and class-of-service
management.
SMT: System Management Terminal.
SMTP: Simple Mail Transfer Protocol.
SNR: Signal to Noise Ratio. The sensitivity of a communications receiver is generally specified in terms of
the audio signal-to-noise ratio that results from an input signal of a certain number of microvolts.
SNMP: System Network Management Protocol is a popular management protocol defined by the Internet
community for TCP/IP networks. It is a communication protocol for collecting information from devices on
the network.
SOHO: Small Office / Home Office.
Splitter: Passive devices that divide the traffic on trunk cables and send it down feeder cables.
STP: Twisted-pair cable consists of copper-core wires surrounded by an insulator. Two wires are twisted
together to form a pair and the pair form a balanced circuit. The twisting prevents interference problems. STP
(shielded twisted-pair) provides protection against external crosstalk.
Straight through Ethernet Cable: A cable that wires a pin to its equivalent pin. This cable connects two
dissimilar devices, for example, a data terminal equipment (DTE) and a data communications equipment
(DCE) device. A straight-through Ethernet cable is the most common cable used.
SUA: Single User Account – The Prestige's SUA (Single User Account) feature allows multiple user Internet
access at the cost of a single ISP account see also NAT.
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Subscriber Unit (SU): An alternate term for cable modem.
TCP: Transmission Control Protocol handles flow control and packet recovery as well as IP providing basic
addressing and packet-forwarding services.
Telnet: Telnet is the login and terminal emulation protocol common on the Internet and in UNIX
environments. It operates over TCP/IP networks. Its primary function is to allow users to log into remote host
systems.
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Glossary