Implementing Secure VoIP Communications for Enterprises

The report provides an exhaustive overview of setting up a secure Voice over Internet Protocol (VoIP) system for a petrochemical company. It includes the design, installation, and configuration processes utilizing Cisco networking devices such as routers, switches, and IP phones. The proposed network infrastructure ensures high-quality voice communication by prioritizing VoIP traffic using Quality of Service (QoS) protocols and implementing security measures to protect against threats. The configuration steps cover initial setup on packet tracer simulations followed by real-world applications in the company's LAN environment. Additionally, it highlights best practices for maintaining the system and optimizing performance. References from authoritative sources like Cisco and industry publications underpin the technical strategies employed.

NETWORK PROJECT

Table of Contents
1. Business Requirement...................................................................................................................3
2. Technical Requirement..................................................................................................................3
3. IP phones.......................................................................................................................................4
4. Quality of Service...........................................................................................................................4
5. WAN failure...................................................................................................................................5
6. Network Test plan.........................................................................................................................5
7. Voice Services................................................................................................................................6
8. Proposed Network Design.............................................................................................................6
9. Network devices............................................................................................................................7
10. VOIP configuration.....................................................................................................................8
References...........................................................................................................................................24
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1. Business Requirement
The business requirements are based on business goals and constraints. The medium sized
petrochemical company uses the voice over IP phone services. It provides the secure network
connection. The medium sized petrochemical company should identify the business needs and
determine the business metrics for measuring the business progress. It is used to improve the
business performances. The business requirement requires the forms of communication to improve
the voice over IP communication [1]. It accesses the product and technology plans based on the
business needs. IT provides the opportunities or long-term contracts. The business requirement
mainly focuses on the quality and meet the customer's needs. The business requirements of medium
sizes petrochemical company are providing the various features. These are,
 The business requirements increase the revenue.
 It provides the security.
 It offers the greater customer support and services.
 It improves the communications
 It reduces the maintenance and operational costs.
 It enhanced the business performance and their needs.
2. Technical Requirement
The medium sized petrochemical technical requirement is based on technical goals and trade-
offs for a company. The Technical requirement collect and analyse the technical goals and trade-offs.
The Technical requirement provides the,
 Usability
 High performance
 Manageability
 Adaptability
 Security
 Scalability
 Affordability
The Trade-off is used to collect the following requirement for medium sized petrochemical
company [2]. These are,
 Packet loss requirement
 Jitter requirements
 Delay and Response time requirement
 Bandwidth requirement
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The technical requirements basically collect and analyse the technical goals and business goals
for a company. It meets the organization business and technical needs and satisfies the technical
needs. The technical requirement is sued to deliver the safety process and high productivity of
communication over the IP phones. It helps to resolve the network issues by implement the network
design. It provides the overall network performance and their needs.
3. IP phones
The IP phone provides the way for extent the high consistent, reliable and secure
communication services to all your staff whether the employee is in mobile, working remotely,
branch offices and campus locations [3]. The IP phones transmit the voice communication through
network by using the open standard based internet protocol. The Cisco IP phones are an integral
part of unified communications and it includes the mobile, voice, video and data applications on
mobile and fixed networks enabling the users to communicate in workspace by using the operating
system. device and media. The Cisco IP phone are helps the all size of organization and realize the
organization scalability, security and resilience. It has inherent benefits of using a converged network
for interconnection network. The medium sized petrochemical using the more than 100 IP phones
for the proposed network design. The Proposed network design implementing the VOIP system.
4. Quality of Service
The quality of service is necessary for WAN wired and wireless network infrastructure in order to
ensure the high voice quality [4]. Because the WAN network infrastructure naturally has the data
traffic and real-time traffic such as voice, packet loss and delay time. To manage the wireless LAN
buffers and reduce the delay variation, packet loss and delay by using the Quality of services. the
WAN and WLAN quality of service involves the following main areas in networks. These are,
 Traffic classification
 Bandwidth Provisioning
 Interface queuing
These three areas are classifying the wireless traffic to provide the quality of services and it
reduce the network traffic in VOIP communications [5].
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5. WAN failure
Having a WAN go down is a major problem in network. A WAN link failure can be far worse. In
this case, every employee is connected to the internet and trying to talk to a headquarters or
requires to communicate with clients are out of luck. So, Using the WAN link Redundancy to solve
the WAN link failure. The WAN link redundancy using the active and passive configuration,
redundant router and inverse multiplexing to resolve the WAN failure. The WAN link redundancy is
part of VOIP service. It introduces the network challenge uptime to communications. It ensures the
voice network stays up and running. It ensures the VOIP connectivity [6].
6. Network Test plan
To test the proposed network design,
 First create the proposed network design.
 Install and configure the Network devices.
 After Ping the IP address in command prompt or Enter the IP address in web browser to ping
the network.
 It provides the network results [7].
For Example,
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7. Voice Services
Voice services are impacted by another data transfer services by delivers the voice
communication and multimedia sessions through IP networks. The voice services are offers the
business models and technical solutions that mirrored that architecture of the legacy telephone
network. The voice services provide the easy internal calling for headquarters. It ensures the data
transfer service by allowing the IP networks to make a phone calls. the voice services are more
sensitive than data transmissions. It provides the high voice quality by implement the quality of
service features to ensures the VOIP packets get priority [8].
8. Proposed Network Design
The Current petrochemical company having the voice services. The Current network
infrastructure does not provide the security and productivity. It increases the maintenance and
operational costs. The Organization team decided to creates the proposed network design. The
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proposed network design is voice over the IP phones communication between the employees. The
VOIP system provides the secure and productivity of the network. The voice over IP phones provides
the greater communication performance and scalability of the network. The proposed network
design is shown in below [9].
The proposed network design network devices are,
 Cisco Routers
 Cisco Switches
 Cisco IP phones
 Cisco VOIP phones
 Cisco Application server
The Proposed network design for petrochemical company has the application server, router, PC and
switches. These are connected with other. Cisco IP phone provides the handset functionality for
cisco unified communication and it extent the voice and multimedia functionality to client which run
on windows. It supports the session border control. It easily simplified the maintenance and
administration. It also supports the SIP trunking third party SIP based phones.
9. Network devices
The Proposed network design network components are listed below.
Devices Number of Devices Products
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PC 2 Dell Computers
Switches 2 Cisco 500 Series Switch
Routers 2 Cisco 1800 Series Router
IP Phones 2 Cisco IP phones 7690
Application Server 1 Cisco Rack server
The Proposed network design provides the secure voice over IP communication for all
employees. It is used to reduce the maintenance and operational costs for petrochemical company.
It also provides the flexibility and availability of the network. The cisco products are used to reduce
the operational costs. The cisco network components are basically used to provide the greater
performance and high network speed.
10. VOIP configuration
The proposed network design configuration is shown in below [10].
PC Configuration
To configuration the PC 0,
Click the PC and choose the Desktop.
Select the IP configuration.
Then enter the IP address as 192.168.1.200
Subnet mask is 255.255.255.0
Default gateway is 192.168.1.1
It is shown in below.
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For PC 1,
Enter the IP address as 192.168.1.202
Subnet mask is 255.255.255.0
Default gateway is 192.168.1.1
It is shown in below.
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Switch configuration
To configure the Switch by enter the below command in command line interface.
In switch 0,
Create the vlan 2
After enter the interface as interface fa1/1
Switchport mode access
Switchport access vlan 2
No shut
Similarly enter another two interfaces. It is shown in below.
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In switch 1,
Create the vlan 3
After enter the interface as interface fa1/1
Switchport mode access
Switchport access vlan 3
No shut
Similarly enter another two interfaces. It is shown in below.
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Router Configuration
To configure the router by enter the below command in command line interface.
In router 0,
Enter the interface as fa0/0
IP address as 192.168.1.1
Subnet mask as 255.255.255.0
After enter another interface as se2/0
Clock rate 64000
IP address as 10.0.0.1
Subnet mask as 255.0.0.0
It is shown in below.
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Here, Enter the IP route command to inter connect the two routers by typing the below command,
ip route 192.168.2.0 255.255.255.0 192.168.1.0
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In router 1,
Enter the interface as fa0/0
IP address as 192.168.2.1
Subnet mask as 255.255.255.0
After enter another interface as se2/0
IP address as 192.168.3.1
Subnet mask as 255.255.255.0
It is shown in below.
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Here, also Enter the IP route command to inter connect the two routers by typing the below
command,
ip route 192.168.1.0 255.255.255.0 192.168.2.0
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IP phone configuration
The IP phone configuration is shown in below.
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Once ON the IP phones, after configure the VOIP system. It is shown in below.
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After provide the vlan access for VOIP phone. It is shown in below.
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Then Assign the IP address for VOIP phones. It is shown in below.
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Finally, the proposed network design installation and configuration is successfully
completed. The Proposed network design provides the secure and productivity of voice over IP
communications for petrochemical company.
References
[1]"Using VoIP to Compete", Harvard Business Review, 2017. [Online]. Available:
https://hbr.org/2005/09/using-voip-to-compete. [Accessed: 26- Sep- 2017].
[2]"Campus LAN and Wireless LAN Design Guide", 2017. [Online]. Available:
https://www.cisco.com/c/dam/en/us/td/docs/solutions/CVD/Oct2016/CVD-Campus-LAN-
WLAN-Design-2016OCT.pdf. [Accessed: 26- Sep- 2017].
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[3]"Packet Tracer 6.1 tutorial - IP telephony basic configuration - Packet Tracer Network", Packet
Tracer Network, 2017. [Online]. Available:
http://www.packettracernetwork.com/tutorials/voipconfiguration.html. [Accessed: 26- Sep-
2017].
[4]"Voice over IP (VOIP) on packet tracer", Cs-study.blogspot.in, 2017. [Online]. Available: http://cs-
study.blogspot.in/2012/12/voice-over-ip-voip-on-packet-tracer.html. [Accessed: 26- Sep-
2017].
[5]R. Sadhu, R. Sadhu and V. profile, "IP Phone Configuration in Packet
Tracer", Ravikumarcisco.blogspot.in, 2017. [Online]. Available:
http://ravikumarcisco.blogspot.in/2013/12/ip-phone-configuration-in-packet-tracer.html.
[Accessed: 26- Sep- 2017].
[6]"IP Telephony", Cisco, 2017. [Online]. Available:
https://www.cisco.com/c/m/en_in/solutions/en/ip-telephony.html. [Accessed: 26- Sep- 2017].
[7]P. Sampson, "3 steps for Implementing VoIP in Your Small Business", blogs@Cisco - Cisco Blogs,
2017. [Online]. Available: https://blogs.cisco.com/smallbusiness/3-steps-for-implementing-
voip-in-your-small-business. [Accessed: 26- Sep- 2017].
[8]"Network Infrastructure", 2017. [Online]. Available:
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucme/srnd/design/guide/
cmesrnd/nstrct.pdf. [Accessed: 26- Sep- 2017].
[9]"Voice Over IP : Protocols and Standards", Cse.wustl.edu, 2017. [Online]. Available:
https://www.cse.wustl.edu/~jain/cis788-99/ftp/voip_protocols/index.html. [Accessed: 26- Sep-
2017].
[10]"Voice Over IP : Protocols and Standards", Cse.wustl.edu, 2017. [Online]. Available:
https://www.cse.wustl.edu/~jain/cis788-99/ftp/voip_protocols/index.html. [Accessed: 26- Sep-
2017].
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