Telephony Class of Service and Call Admission

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


recognize how to implement a telephony Class of Service (CoS) within in a Cisco CallManager cluster, configure a Cisco IOS gatekeeper for call admission control, and configure SRST on a Cisco IOS gateway.

Target Audience

IT professionals responsible for installing, configuring, and maintaining the ongoing administration of a Cisco IP Telephony solution; candidates preparing for the Cisco IP Telephony exam (642-444 CIPT)


CCNA certification; Building Cisco Multilayer Switched Networks (BCMSN); Cisco voice over IP (CVOICE); Microsoft Software for Cisco Voice (MSCV)

Expected Duration

250 min.

Course Objectives

Telephony Class of Service and Call Admission

  • recognize how to configure partitions and calling search spaces and recognize how they facilitate class of service (CoS) in a telephony network.
  • configure a partition and a calling search space to apply a class of service for Cisco IP Telephony devices, in a given scenario.
  • identify the definition of time-of-day routing and recognize its applications and components.
  • recognize how to configure time-of-day routing to control call routing based on the time of day, the day of week, and the day of year when a call is made.
  • Recognize how to configure locations-based call admission control in Cisco CallManager.
  • recognize the requirements for applying Automated Alternate Routing (AAR) using Cisco CallManager.
  • recognize a definition of the AAR Calling Search Space and how to configure Cisco CallManager for AAR.
  • recognize the process for establishing communication between a gatekeeper and a H.323 endpoint and recognize how to configure gatekeeper-based call admission control using Cisco CallManager.
  • configure a gatekeeper for Call Admission Control (CAC) using Cisco CallManager, for a given scenario.
  • configure location-based and gatekeeper-based call admission controls using Cisco CallManager, for a given scenario.
  • identify the features supported by Cisco SRST and recognize how it provides CallManager fallback if a WAN connection fails in a centralized call-processing deployment.
  • Recognize how to configure SRST on Cisco IOS routers and assign an SRST reference in Cisco CallManager.
  • provide call-processing redundancy and assign an SRST reference for a given scenario.