Glossary
Communications
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Broadband
Internet. Broadband systems are typified by being always connected and having faster connection
speeds than dial-up. The most popular kinds of broadband include ADSL (Asymmetric Digital Subscriber
Line) and Cable.
Dial backup
The ability of a terminal to revert to the dial mode of communication in the event of an IP/Ethernet
connection being unavailable.
DHCP - Dynamic Host Control Protocol
A system where IP Addresses are assigned to networked equipment automatically.
DSL filter
A device that improves the quality of an ADSL (broadband) enabled telephone line by separating
data and voice signal frequencies.
Ethernet
A standard used to physically connect devices together. Networking protocols such as IP can be
used over Ethernet connected equipment.
GPRS - General Packet Radio Service
This is a method of communicating data via the mobile phone network.
IP - Internet Protocol
A method whereby data is transmitted over networks such as the Internet (may also be expressed
as TCP/IP).
IP address
A number represented in the form XXX.XXX.XXX.XXX which identifies a device on the Internet
(for example: 193.129.71.130). These numbers are the networking equivalent of telephone numbers.
MAC address - Media Access Control address
An individual address given to every piece, of Ethernet networking equipment. This address is always
marked on Spire Payments equipment containing such an address. Do not confuse with Message
Authentication Certificate: a certificate used in the UKCA Standard 70 message protocol.
PABX - Private Automatic Branch eXchange.
Usually found as part of a larger telephone system, requiring the user to press a number on their
telephone to make an external call.
TCP port
A number representing a service at a particular IP address.
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