Cisco ONT 1.0: Supporting VoIP

This course is included in our On-demand training solution.


To recognize how voice is encapsulated, bandwidth requirements and overhead, and how voice is implemented in an enterprise

Target Audience

Individuals preparing for the Cisco Certified Network Professional CCNP and the Cisco Certified Design Professional CCDP certifications; senior-level network support professionals, network administrators, network engineers, network managers, systems managers, or network designers


Introduction to Cisco Networking Technologies (INTRO) 2.1; Interconnecting Cisco Network Devices (ICND) 2.3; the ability to create interswitch connections and the initial configuration of a router, an understanding of routing, routing protocols, WAN technologies, security risks, IP addressing, ALCs, client utilities, and IOS familiarity

Expected Duration

120 min.

Course Objectives

Cisco ONT 1.0: Supporting VoIP

  • recognize how voice is encapsulated into IP packets, the purpose of RTP, and how header overhead is reduced with cRTP.
  • recognize the impact of voice samples and packet size on bandwidth, its requirements, and the sources of overhead.
  • recognize how to calculate total bandwidth for a VoIP call and reduce bandwidth consumption.
  • recognize how VoIP is implemented in an enterprise and the models used.
  • recognize voice commands in Cisco IOS configurations and CAC functionality.
  • determine how to implement voice support in an enterprise network, given a scenario.