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7 Telephony Hardware
7
Telephony Hardware
CERTIFICATION OBJECTIVES
3.5.3 Traditional vs. IP-Based PBX Systems
1.2.12 Data and Voice Network Transmission Technologies
Two-Minute Drill
Q&A Self Test
While this chapter is a brief one, it is very important. This chapter introduces you first to the traditional PBX systems we’ve used in enterprise networks for years and then to the modern hybrid and fully IP PBX solutions. Understanding the different components that make up a PBX system is a first step to understanding modern converged networks.
The second major topic of this chapter is a review of the connection types that are used in data and voice networks. The specific focus is on the connection types that are provided by service providers such as ISDN, T1 lines, and E1 lines.