Transmittal Letter

September 26, 2006To:Dr. Muhammad A. Kalam, PHDTelecommunications Applied Research inGigabit & Emerging TechnologiesDept. of Electrical EngineeringUniversity of Texas at DallasBox 830688-0688Richardson, TX 75080

SUBJ: Proposal to configure VoIP over SONET using linear topology using OC-12, OC-48, and OC-192

Dear Professor:

The purpose of this proposal is to recapitulate a practicability study for a having VOIP system over Synchronous Optical Network Ring Topology from an existing Linear Topology using voice gateway, OC-3, OC-12, OC-48, and OC-192.This proposal is based on our evaluation and understanding of the requirements identified during EE4382 Senior Design meetings.

The enclosed project document includes details and the advantages of the having VoIP over Sonet.

.

SENIOR DESIGN PROJECT

EE-4382

Design of a VoIP system over SONET

Submitted to: Dr. M. Kalam, Phd

BY

Amsalu  Alelgn

Bhenderu Lavanya

D'Lima Melanie

Kotragouda Madhusudhan

Mei Amanda

Patel Dharmesh

Benny Truong

Abstract

To configure a VOIP system over Synchronous Optical Network Ring Topology from an existing Linear Topology using voice gateway, OC-3, OC-12, OC-48, and OC-192.

Introduction

VoIP systems are dominating over the legacy telephone systems especially for long distance calls by reducing the cost. Corporate are also implementing VoIP because it’s easy to implement VoIP on their data network, which results in low cost communication between their branches. Companies are also shifting towards VoIP because integration between data and voice is simple and cost effective. VoIP allows users to travel anywhere in the world and still make and receive phone calls using the same phone number. VoIP phones can integrate with other services available over the Internet, including video conversation, message or data file exchange in parallel with the conversation, audio conferencing, managing address books and passing information about whether others (e.g. friends or colleagues) are available online to interested parties.

Objectives and Deliverables

Our team is investigating to configure VoIP over Synchronous Optical Network Ring Topology from an existing Linear Topology using voice gateway, OC-3, OC-12, OC-48, and OC-192. Since most corporate network infrastructure is already based on fiber optic networks, this is the perfect breeding ground to prove that adding VoIP will indeed decrease the cost. Adding VoIP to an existing infrastructure will all the existing cost of telephone services to be eliminated and combine with the existing network. This design shows how a VoIP system and computer systems to coexist on the same network.

Technical Approach

The following is the network using the equipment in the lab.

As shown in above figure we are trying to have data and voice on the same network. As seen above the VoIP phones and the computers are connected to LAN, which in turn is connected to routers and eventually to the linear optical network of OC-3, OC-12, OC-48, and OC-192. On the other side it’s decoded using the same logic. By completing the above network successfully we will be able to implement integrated services on the same network. This will return huge profits to the business who implements the above network.

The figure below shows the real world scenario of the above network.

Below shown diagram shows an overview of the network using the equipment in the lab.

NortelOC-192

Cisco 12000Cisco Gigabit Router

OC-48

Cisco 6509

Nortel

OC-192

Cisco 12000Cisco Gigabit Router

OC-48

Cisco 6509

NortelOC-48

NortelOC-48

As shown in above figure the IP phones and the PC’s are connected to the hub through Ethernet and then they are connected to Cisco 6509 LAN switch. From Cisco 6509 the electronic signal is converted into optical signal and sent to the Cisco 12000 series which formats into SONET frames and the signal is transmitted to Nortel OC-48. The reason we are connecting Nortel OC 48 from Cisco OC-48 from our research, we have found out that there is no good compatibility between the Cisco OC-48 and Nortel 192.

Conclusion

In this fast paced world the need for more efficient and cost effective way of communication is necessary. As a result most of the corporates are trying to switch from legacy telephone system to VoIP.

As we explained in the project above we think that if the above project would be put in to the real world, there would be so many companies who would benefit from it, because majority of the companies use telephone as a means of communications with its other branches around the world. If companies start using the VoiP phones this will decrease their phone costs and companies will have an increase in revenue at the end of the year