IPitomy IP1100+ PBX Administrator Guide - Manual (Page 256)

IPitomy IP PBX Admin Guide
O
Original Equipment Manufacturer (OEM) - This refers to a company that produces hardware to be
marketed under another company's brand name.
P
Packet – A unit of data transmitted over a network. This is a small amount of computer data sent over a network.
Any time you receive data from the Internet, it comes to your computer in the form of many little packets. Each
packet contains the address of its origin and destination, and information that connects it to the related packets
being sent.
Park – Parks a call in a reserved extension (park slot) and allows the call to be retrieved from another extension.
POE (Power over Ethernet) – A method of providing power to a network device over the network cabling,
eliminating the need for a power supply.
Port – Ports can describe two different devices.
An Internet port. This is a number that indicates what kind of protocol a server on the Internet is using.
For example, Web servers typically are listed on port 80. Web browsers use this port by default when accessing
Web pages
A hardware port. This refers to any one of the ports that are on the back of a computer where devices
can be hooked up (like a keyboard, mouse, printer, etc). Some common ports found on today's computers are
USB, Firewire, and Ethernet.
PRI (Primary Rate Interface) – ISDN service provides 23 64-Kbps B (Bearer) channels and one 64-Kbps D
(Data) channel (23 B and D). The D Channel is used for control in signaling information.
Private Branch Exchange (PBX) – An in-house telephone system that connects extensions and the Public
Switched Telephone Network.
Public Switched Telephone Network (PSTN) – This is the global circuit-switched telephone network. It is
similar to the Internet. However, on the Internet packets of data are sent and received using Internet protocol over
a network.
Q
Quality of Service (QoS) - The ability to provide different priority to different applications, users, or data flows,
or to guarantee a certain level of performance to a data flow.
R
Redundant Array of Independent Disks (RAID) – This is a method of storing data on multiple hard disks.
When disks are arranged in a RAID configuration, the computer sees them all as one large disk. However, they
operate much more efficiently than a single hard drive. Since the data is spread out over multiple disks, the
reading and writing operations can take place on multiple disks at once. This can speed up hard drive access time
significantly. Multiple hard drives may not improve hard disk performance as much as multiple processors may
enhance the CPU performance, but it is based on a similar logic.
Real-Time Protocol (RTP) - a standardized packet format for delivering audio and video over IP networks.
Router – A networking device that connects multiple networks together, such as a local network and the Internet.
S
Server – Any computer in a network that provides users access to files, printing, communications, etc.
Server Time – this is the time set on the server where the phone or device is located. The server time for