Chapter 5

4. A simple personal communication device for short messages.
7. directory: A directory which gives the names and extension numbers of departments and officials.
9. This type of call connects the caller to a number overseas. The caller dials the number directly without the aid of an operator.
13. dialing: The numbers can be dialed automatically by simply dialing one digit.
14. top-up machines: These allow customers to extend the credit on their mobile phones instantaneously.
15. Most businesses have more than one telephone and probably more than one telephone number. The telephones are usually connected to a ________.
17. calls: These are all calls made inland, whether domestic or commercial. Equipment often billed a month in advance.
18. These are also known as Manual Exchanges.
19. conference: This is interactive communication among people at two or more locations using telecommunication.

1. Is the general term for family of transmission technologies for delivery of voice communications over IP networks such as the internet.
2. distance: Charges are billed after the event.
3. switchboard: Captures and directs a caller through a menu of options.
4. This type of call is made when the caller wants to speak with a particular person.
5. forwarding: Incoming calls can be transferred to another number if the person is away from the office.
6. These are commonly known as Automatic switchboard.
8. mail: A computer based voice storage system.
10. messaging: The exchange of brief written messages between mobile phones over cellular networks.
11. calls: Is made when the chargers are billed to the called telephone number.
12. An alternative means being offered by some companies. This reduced the telephone bills to a great extent.
16. Directories: This lists the names and phone numbers of private individuals,companies,schools,government organisation.