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Course Outline
Objectives:
- Describe the operation of circuit-switched networks.
- Contrast the characteristics of circuit-switched and packet-switched networks.
- Detail the fields and flags within the IP header, including the DSCP field.
- Explain and quantify the requirements for voice compression and latency within an IP network.
- Identify the CODECs used in voice and video compression, such as G711, G729, and H.261/3/4.
- Identify and explain the fields of the Real Time Transport Protocol (RTP) and Real Time Control Protocol (RTCP), including the transmission of DTMF tones.
- Calculate bandwidth requirements for various voice compression algorithms.
- Explain and demonstrate the necessity for security and encryption in VoIP.
- Describe and explain the H.323 protocol stack.
- Describe and explain call setup and signalling (H.225).
- Describe and explain H.245, fast start, and tunnelling of H245.
- Describe and explain SIP call setup.
- Describe and explain SIP Servers.
- Describe and explain SDP.
- Describe and explain Soft Switching, including MGCP and H248.
- Describe and explain the use of SCTP for backhauling signalling messages.
- Describe and explain the significance of network latency and the need for Quality of Service (QoS) in the network.
- Describe and explain the differences between reservation-based and prioritization-based QoS in an IP Network.
- Describe the application of IntServ and RSVP in QoS.
- Describe the application of TOS and DiffServ in QoS.
- Describe and explain the need for multiple queues and intelligent packet scheduling at router/switch interfaces.
- Describe the use of MPLS to deliver QoS in WAN environments.
- Describe the use of VLANs to deliver QoS in LAN environments.
Practical Exercises:
- Lab Exercise 1: Practical VoIP in the LAN.
- Lab Exercise 2: Construct an IP network, place calls, and analyze RTP packets using Wireshark.
- Lab Exercise 3: Place calls and analyze SIP packets using Wireshark.
- Lab Exercise 4: Place calls and analyze H.323 packets using Wireshark.
- Lab Exercise 5: Establish calls between PSTN and IP Networks.
- Lab Exercise 6: Configure QoS and place calls to observe its effects.
- Lab Exercise 7: Security and VoIP.
Equipment used in Practical Sessions:
- Cisco 2600 and 2800 series voice-capable routers, and Cisco ASA 5505 Firewalls. IP telephones, softphones, and analogue telephones as needed. SIP client and server software as required.
Requirements
- Delegates are expected to possess a working knowledge of TCP/IP.
21 Hours
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