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Course Outline
Objectives:
- Clarify the operation of circuit-switched networks.
- Compare the distinctions between circuit-switched and packet-switched networks.
- Detail the fields and flags within the IP header, including the DSCP field.
- Explain and quantify the necessity of voice compression and delay management in IP networks.
- Identify CODECs used for voice and video compression, such as G711, G729, and H261/3/4.
- 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 requirements for security and encryption within VoIP environments.
- Describe and explain the H.323 protocol stack.
- Describe and explain call setup and signalling (H.225).
- Describe and explain H.245, fast start procedures, and H245 tunnelling.
- Describe and explain SIP call setup processes.
- Describe and explain SIP Servers.
- Describe and explain SDP.
- Describe and explain Soft Switching, including MGCP and H248.
- Describe and explain the application of SCTP in backhauling signalling messages.
- Describe and explain the significance of network delay and the requirement for Quality of Service (QoS).
- Describe and explain the differences between reservation-based and prioritization-based QoS in IP networks.
- Describe the application of IntServ and RSVP in QoS implementations.
- Describe the application of TOS and DiffServ in QoS.
- Describe and explain the necessity for multiple queues and intelligent packet scheduling at router/switch interfaces.
- Describe the use of MPLS for delivering QoS in WAN environments.
- Describe the use of VLANs for delivering QoS in LAN environments.
Practical Exercises:
- Lab Exercise 1: Practical VoIP in the LAN.
- Lab Exercise 2: Build 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 H323 packets using Wireshark.
- Lab Exercise 5: Establish calls between PSTN and IP networks.
- Lab Exercise 6: Configure QoS and place calls to observe effects.
- Lab Exercise 7: Security and VoIP.
Equipment used in Practical Sessions:
- Cisco 2600 and 2800 series voice-capable routers, along with Cisco ASA 5505 Firewalls. IP telephones, softphones, and analogue telephones as needed. SIP client and server software as needed.
Requirements
- Participants are expected to possess a working knowledge of TCP/IP.
21 Hours
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