TA7104 /7108 Hardware Installation
155/1531-ANF 90114 C 2017-03-08
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A small to medium sized telephone system and switch that provides communications between onsite
telephones and exterior communications networks.
Protocol
A formal set of rules developed by international standards bodies, LAN equipment vendors, or groups
governing the format, control, and timing of network communications. A set of conventions dealing
with transmissions between two systems. Typically defines how to implement a group of services in
one or two layers of the OSI reference model. Protocols can describe low-level details of machine-to-
machine interfaces or high-level exchanges between allocation programs.
Public Switched Telephone Network (PSTN)
The local telephone company network that carries voice data over analog telephone lines.
Router
A specialized switching device which allows customers to link different geographically dispersed local
area networks and computer systems. This is achieved even though it encompasses different types of
traffic under different protocols, creating a single, more efficient, enterprise-wide network.
Switched Circuit Network (SCN)
A communication network, such as the public switched telephone network (PSTN), in which any user
may be connected to any other user through the use of message, circuit, or packet switching and
control devices.
Server
A computer or device on a network that works in conjunction with a client to perform some operation.
Session Initiation Protocol (SIP)
A protocol for transporting call setup, routing, authentication, and other feature messages to endpoints
within the IP domain, whether those messages originate from outside the IP cloud over SCN
resources or within the cloud.
Subnet
An efficient means of splitting packets into two fields to separate packets for local destinations from
packets for remote destinations in TCP/IP networks.
Transmission Control Protocol/Internet Protocol (TCP/IP)
The basic communication language or protocol of the Internet. It can also be used as a
communications protocol in a private network (either an intranet or an extranet).
Voice Over IP (VoIP)
The technology used to transmit voice conversations over a data network using the Internet Protocol.
Such data network may be the Internet or a corporate Intranet.
Wide Area Network (WAN)
A large (geographically dispersed) network, usually constructed with serial lines, that covers a large
geographic area. A WAN connects LANs using transmission lines provided by a common carrier.
