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VoIP Protocols: SIP and H.323

Chapter Description

In this sample chapter from CCNP Collaboration Call Control and Mobility CLACCM 300-815 Official Cert Guide, you will review the function components of Session Initial Protocol (SIP), exam Session Description Protocol (SDP) fundamentals, and examine the H.323 communication protocol.

Review All Key Topics

Review the most important topics in the chapter, noted with the key topics icon in the outer margin of the page. Table 2-9 lists these key topics and the page number on which each is found.

Images

Table 2-9 Key Topics for Chapter 2

Key Topic Element

Description

Page

Figure 2-1

Sample SIP Dialog with Two Transactions

32

List

List of SIP components

34

Table 2-2

SIP Requests

35

Table 2-3

SIP Response Classes

36

Figure 2-3

Analyzing a Basic SIP Call

46

Table 2-5

Fields and Attributes in SDP Bodies

50

Figure 2-4

SIP Delayed Offer Versus SIP Early Offer

53

Table 2-7

SDP Direction Attributes Description

56

Table 2-8

Different Ways of Setting the Direction Attribute in an Answer

58

Figure 2-6

SIP re-INVITE and UPDATE Session Modifications

61

List

H.323 components

67

Figure 2-7

Basic H.323 Slow Start Call

69

Figure 2-8

H.323 FastConnect Call Setup

70

8. Complete Tables and Lists from Memory | Next Section Previous Section

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