There are many features that can be enabled to make your working simpler, features include:

Feature

What does it do?

Call Waiting

Warns you if another caller is trying to reach you when you are already on the phone

Call Diversion

Divert incoming calls to either another landline or a mobile

Call Sign

You have an extra phone number on your line that rings differently enabling you to distinguish between calls

Ring Back

Saves you re-dialling an engaged number until the line is free

Reminder Call

Sets an alarm call
3 Way Calling use Lets you speak to two people at two different locations on the same call in a 3-way conversation
Caller Display You can see the number of the person calling you before you answer the phone
Call Barring Prevents your phone from making certain outgoing calls
Non geographical Numbers Great for marketing, available in 0844, 0845, 0870 and others
Premium Rate Numbers Ideal if you wish to operate a premium service
Local Numbers These are great if you wish to have a number with an area code from a different town or even country