1. Diyala University
College of Engineering
Department of Communications
By AULA MAAD
THIRD STAGE
With MS ALI MOHAMAD
2014_2_14

2. PRIVAT BRANCH PBX)
EXCHANGE

3. Contents
PRIVAT BRANCH EXCHANGE
TYPES OF PBX
Network Technologies
THE MAIN TECHNICAL ROLES OF A PBX
PBX Components
Advantage
DISADVANTGES OF PBX

5. PRIVAT BRANCH EXCHANGE (P B X)
Is a switch station for telephone •
systems it consist mainly of several
branches of telephone systems
and it switches connections to and
from them there by linking phone
lines

7. TYPES OF (PBX
1-PBX TRADITIONAL •
PBX traditional uses a (phone box ) that •
connect several phones through phone
lines running through it the (phone box)
in turn is connected to a cable that runs
out sid the company network and links in
to the telephone service provider the
earliest traditional PBX were manually
operated through switch board

9. TYPES OF (PBX
2-HYBRID PBX •
Hybrid PBX systems support both the •
traditional model and (VoIP)or voice over
internet protocol phones (VoIP) enables
users to place calls using the internet
which serves as a cost effective solutions
for companies that already have
traditional PBX systems in place but
would like to take advantage of new
technology available

11. TTPES OF (PBX
3-IP PBX •
IP PBX internet protocol PBX uses the •
internet to place calls since it uses the data
network to connect calls from multiple users
it can be deployed using a single line it
requires less maintenance all allows for easy
expansion as (VoIP) is becoming popular
more and more companies are seeking to
implement an IP PBX system

13. TTPES OF (PBX
4-SIP PBX •
SIP PBX avariant of the IP PBX it uses the •
session initiation protocol this is the
newes in PBX technology it allows clients
to use nonproprietary telephones other
devices such as PDAs laptops and
cellphones can connect to the system
provided they are SIP-capable

15. Three Network Technologies
Telephone Network •
The largest worldwide computer network, specialized for –
voice
Switching technique: Circuit-switching –
Internet •
The global public information infrastructure for data –
Switching technique: Datagram packet switching –
ATM •
Was intended to replace telephone networks and data –
networks, but lost momentum due the success of the
Internet
Switching technique: VC packet switching –

17. THE MAIN TECHNICAL ROLES OF A PBX
1-To switch between telephone users •
thereby creating connections
2-To make sure the connection remains in •
place properly by keeping it is resources
3-To properly end the connection when a •
user hangs up
4-To record the quantities statistics and •
metering related to the calls

19. PBX Components
Continued
Equipment Cabinet: Main
Processor, Trunk
Cards, And Line Cards
Telephones And Attendant Console
Administrative Terminal

21. ADVANTGES OF PBX
Incoming Call Control •
Internal Call Control •
Speed Dialing •
Automated Information •
User Friendly •
Higher Call Volume •
Hands-Free Operations •
Courteous Waiting •
Value •

22. Disadvantages
Companies are ill-equipped for disasters •
related to communication •
Costly upgrade •
Requires additional employees to •
maintain and manage the system
Unrelated business activity are difficult •
to manage

25. QUSITIONS ? OR
COMMENT