Survivable Remote Site Telephony

Table of contents:

Review Questions

You can find the solutions to these questions in Appendix A, "Answers to Review Questions."

1.

Which is a benefit associated with gatekeeper call admission control?

  1. no requirement to configure Cisco IOS commands on the gatekeeper
  2. no requirement to configure an Intercluster Trunk between clusters
  3. provides emergency call-handling capability if the WAN link fails
  4. provides call admission control over the intranet in addition to the WAN
2.

Without call admission control, what happens to existing calls when the next call oversubscribes the WAN?

  1. All calls are dropped.
  2. Voice quality on all calls degrades.
  3. Voice quality on the last call degrades.
  4. Nothing happens if the router is configured for QoS.
3.

Which two characteristics are associated with the distributed call-control environment? (Choose two.)

  1. Intercluster Trunk to each Cisco CallManager cluster
  2. gatekeeper-controlled trunks
  3. maximum bandwidth determined on the Cisco CallManager
  4. zones and bandwidth allocation configured on the gatekeeper
4.

How do the Cisco IP Phones in a branch site know how to register to a gateway running SRST?

  1. The IP Phones stop receiving keepalive packets from the SRST gateway.
  2. The IP address is configured on the gateway and passed to the IP Phone.
  3. The gateway IP address is specified in the SRST Reference Configuration window and assigned to a device pool.
  4. The device pool contains the IP address reference to the SRST gateway.
   
5.

Using the Cisco CallManager locations feature, how many simultaneous audio calls can be placed over a given WAN link with 128 kbps of available bandwidth using a G.729 codec?

  1. two
  2. three
  3. four
  4. five
6.

AAR derives the alternate dial string used to route the call over the PSTN from which three of the following? (Choose three.)

  1. DN
  2. external phone number mask
  3. AAR calling search space
  4. MAC address
  5. PSTN prefix
  6. AAR group
7.

Which command is used to initiate SRST capabilities on an IOS-based router?

  1. telephony-service
  2. call-fallback
  3. call-manager-fallback
  4. ccm-communication
8.

You are working in a location-based CallManager deployment. Phone A (DN=3423) dials onnet to Phone B (DN=3420). The location-based CAC denies the call and AAR initiates. Which external phone number mask will be used by AAR to complete the call?

  1. Phone A
  2. Phone B
  3. the gateway at the calling site
  4. the gateway at the called site
9.

What is the default state of AAR in a CallManager cluster?

  1. AAR is enabled, but must be configured by an administrator.
  2. AAR is enabled and preconfigured, provided the administrator has entered the correct external phone number masks under the applicable DNs.
  3. AAR is disabled until a feature license is applied.
  4. AAR is disabled.
   
10.

You have AAR configured in a cluster to divert calls to the PSTN should the IP WAN become unusable. To test the configuration, you disconnect the WAN and place a call to an alternate site. The CallManager returns a reorder tone. You are sure the digit transformation settings are configured correctly; what is the most likely cause of this problem?

  1. AAR does not function in a distributed call-control environment.
  2. The AAR calling search space does not provide the necessary privileges to complete the call.
  3. The standard calling search space does not provide the necessary privileges to complete the call.
  4. AAR does not function during a WAN failure.

Part I: Cisco CallManager Fundamentals

Introduction to Cisco Unified Communications and Cisco Unified CallManager

Cisco Unified CallManager Clustering and Deployment Options

Cisco Unified CallManager Installation and Upgrades

Part II: IPT Devices and Users

Cisco IP Phones and Other User Devices

Configuring Cisco Unified CallManager to Support IP Phones

Cisco IP Telephony Users

Cisco Bulk Administration Tool

Part III: IPT Network Integration and Route Plan

Cisco Catalyst Switches

Configuring Cisco Gateways and Trunks

Cisco Unified CallManager Route Plan Basics

Cisco Unified CallManager Advanced Route Plans

Configuring Hunt Groups and Call Coverage

Implementing Telephony Call Restrictions and Control

Implementing Multiple-Site Deployments

Part IV: VoIP Features

Media Resources

Configuring User Features, Part 1

Configuring User Features, Part 2

Configuring Cisco Unified CallManager Attendant Console

Configuring Cisco IP Manager Assistant

Part V: IPT Security

Securing the Windows Operating System

Securing Cisco Unified CallManager Administration

Preventing Toll Fraud

Hardening the IP Phone

Understanding Cryptographic Fundamentals

Understanding the Public Key Infrastructure

Understanding Cisco IP Telephony Authentication and Encryption Fundamentals

Configuring Cisco IP Telephony Authentication and Encryption

Part VI: IP Video

Introducing IP Video Telephony

Configuring Cisco VT Advantage

Part VII: IPT Management

Introducing Database Tools and Cisco Unified CallManager Serviceability

Monitoring Performance

Configuring Alarms and Traces

Configuring CAR

Using Additional Management and Monitoring Tools

Part VIII: Appendix

Appendix A. Answers to Review Questions

Index



Authorized Self-Study Guide Cisco IP Telephony (CIPT)
Cisco IP Telephony (CIPT) (Authorized Self-Study) (2nd Edition)
ISBN: 158705261X
EAN: 2147483647
Year: 2004
Pages: 329

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