Installation and Reference Manual
Glossary
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Installation and Reference Manual v3.2/0410/6
This is an un-announced transfer, where the user dials the number required and hangs up to connect the
caller without the destination verbally accepting the call.
In general, to broadcast (verb) is to cast or throw forth something in all directions at the same time. A
radio or television broadcast (noun) is a program that is transmitted over airwaves for public reception by
anyone with a receiver tuned to the right signal channel.
Broadcast should not be confused with a multicast which is a transmission to multiple specific receivers
(as in e-mail to a distribution list).
The Call Waiting facility enables a User to receive a second call and handle the two calls simultaneously.
Caller Line Identification (CLI/CLID)
CLI is a service supplied by most phone providers, whereby your phone number is transmitted when you
make a phone call.
CLI codes
• 1471 - Check the number of the last person to ring you. Add a "3" to call the last number
• 141 - Dial before a phone number to withhold your number
• 1470 - Dial before a number to allow your number to be sent even if your network normally withholds
your number
Dynamic Host Configuration Protocol (DHCP) is a communications protocol that lets network
administrators manage centrally and automate the assignment of IP addresses in an organisations
network. Using IP, each host on the network must be assigned a unique IP address. Without DHCP, the IP
address must be entered manually at each computer and, if computers move to another location in
another part of the network, a new IP address must be entered. DHCP lets a network administrator
supervise and distribute IP addresses from a central point and automatically sends a new IP address when
a computer is connected into a different place in the network.
A DHCP client is a host on a network configured to obtain an IP address from a DHCP Server. A DHCP
server is host on the network configured to assign IP addresses to DHCP clients.
DHCP uses the concept of a "lease" or amount of time that a given IP address will be valid for a computer.
The lease time can vary depending on how long a user is likely to require the network connection. This is
especially useful in environments where users change frequently. Using very short leases, DHCP can
dynamically reconfigure networks in which there are more computers than there are available IP
addresses.
DHCP supports static addresses for computers that need a permanent IP address.
Some operating systems, including Windows NT/2000, come with DHCP servers.
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