This document provides an overview of Pakistan Telecommunication Company Limited's telecommunications network. It discusses the company's vision and products, including its next generation network, switching system, and ring topology which allows calls to reroute if one side of the network goes down. It also describes the service switching points that initially handle calls and use SS7 protocols for call setup, as well as the different types of workstations used to monitor the network.

1. PAKISTAN
TELECOMMUNICATION
COMPANY LIMITED
Iqra Iqbal

3. Acknowledgement

4. Preface

5. Introduction

6. Vision

8. Products

9. Next Generation Network

10. Switching system

11. GISB & NMS Network Type

12. MSAG

14. Class 4 and Class 5 Soft
Switches

15. STP (Signal Transfer Point)

16. Main Distribution Frames

17. Ring topology
The NMS (Network Management System) of Switching has implemented
Ring Topology so that if network is down from one side of an MSAG it will
re-route from the other side of Ring.

18. SSP
In telephony, a service switching
point (SSP) is the telephone exchange
that initially responds, when a telephone
caller dials a number, by sending a query
to a central database called a service
control point (SCP) so that the call can
be handled. The service switching point
uses the Signaling System 7 (SS7)
protocols which are responsible for the
call setup, management, and termination
with other service switching points.

19. Workstations
There are 2 types of workstations:
Simple workstation
It is simple workstation used mostly. The interface is
computer system. It is used normally for checking statuses.
Emergency workstation
This workstation is used for authorized personnel only. It is
also called BAM, which stands for Back Administration
Module.

21. Transmission Technology

22. Optical Distribution Frame

25. OTDR

26. Graph

27. Testing of transmission lines

28. Recommendation & Conclusion