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Course Outline
Learning Objectives:
- Articulate the operation of circuit-switched networks.
- Distinguish between circuit-switched and packet-switched network architectures.
- Define the fields and flags within the IP header, including the DiffServ Code Point (DSCP) field.
- Explain and quantify the requirements for voice compression and delay tolerance in IP networks.
- Identify CODECs employed in voice and video compression, such as G.711, G.729, and H.261/3/4.
- Identify and explain the fields of the Real-time Transport Protocol (RTP) and Real-time Transport Control Protocol (RTCP), including the transmission of DTMF tones.
- Calculate bandwidth requirements for various voice compression algorithms.
- Explain and demonstrate the necessity of security and encryption within VoIP systems.
- Describe and analyze the H.323 protocol stack.
- Explain call setup and signaling mechanisms (H.225).
- Detail H.245 functionality, including Fast Start and H.245 tunneling.
- Describe and explain SIP call setup procedures.
- Explain the role of SIP Servers.
- Describe and explain the Session Description Protocol (SDP).
- Explain Soft Switching concepts, including MGCP and H.248 protocols.
- Describe and explain the utilization of SCTP for backhauling signaling messages.
- Emphasize the importance of network delay and the necessity of Quality of Service (QoS).
- Compare reservation-based and prioritization-based QoS mechanisms in IP networks.
- Explain the roles of IntServ and RSVP in implementing QoS.
- Describe the application of Type of Service (TOS) and Differentiated Services (DiffServ) in QoS.
- Explain the requirement for multiple queues and intelligent packet scheduling at router/switch interfaces.
- Describe the use of MPLS to deliver QoS in wide area network (WAN) environments.
- Explain how VLANs are utilized to deliver QoS in local area network (LAN) environments.
Practical Exercises:
- Lab Exercise 1: Implementing VoIP within a LAN.
- Lab Exercise 2: Construct an IP network, initiate calls, and analyze RTP packets using Wireshark.
- Lab Exercise 3: Initiate calls and analyze SIP packets using Wireshark.
- Lab Exercise 4: Initiate calls and analyze H.323 packets using Wireshark.
- Lab Exercise 5: Establish calls between PSTN and IP networks.
- Lab Exercise 6: Configure QoS parameters and evaluate their impact on call quality.
- Lab Exercise 7: Explore security aspects of VoIP.
Equipment Used in Practical Sessions:
- Cisco 2600 and 2800 series voice-capable routers, Cisco ASA 5505 [4 units], IP telephones, softphones, and analog telephones as needed. SIP client and server software as required.
Requirements
- Participants are expected to possess a functional understanding of TCP/IP.
21 Hours
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