After a successful login using Cisco Extension Mobility, an IP phone performs a restart followed by
a reset. What can cause this issue?

Your Cisco Unified CallManager 5.0 cluster is using your corporate Windows 2003 Active
Directory for user information. Over the weekend you updated the Windows 2003 Active Directory
Server and added a small group of new users. Cisco Unified CallManager is configured to
synchronize with the Active Directory server every 8 hours and it has been 32 hours since the last
successful synchronization. The configuration on Cisco Unified CallManager did not change during
the Active Directory server upgrade and the remainder of the Windows network is functioning
properly.
What are two possible causes of this synchronization issue? (Choose two.)

Refer to the exhibit.

You have received a trouble ticket stating that users cannot place calls to the
PSTN. During testing you discover the gateway is not switching to the secondary call agent when
the primary call agent is unreachable.
What needs to be done to allow the MGCP gateway to use a different call agent if the primary
fails?

You have received a trouble ticket stating that when callers dial the internal Help Desk queue at

extension 2300, they hear a message that their calls cannot be completed as dialed. Which two
issues could cause this problem? (Choose two.)

When using trace output to troubleshoot a Cisco Unified CallManager 5.0 problem, how can you
collect and view the trace files?

Which type of echo is found mostly on tail circuits and is due to reflection that causes the Tx signal
to appear on the Rx signal?

Your Cisco Unified CallManager 5.0 cluster has just started to use a third-party LDAP service.
Users complain that they are unable to make changes to their passwords in their Cisco Unified

CallManager user web pages. How should you resolve this problem?

You have received a trouble ticket stating that an IP phone is not working. When asked, the user
informs you the phone is displaying the message “Registration rejected.” Which two issues are
possible causes of this problem? (Choose two.)

Refer to the exhibit.

A site is using four-digit extensions for internal calling. The voice-mail pilot
number is 8000. Calls to extension 2001 hear the Cisco Unity opening greeting instead of the
subscriber’s greeting when forwarded to Cisco Unity.
What is the probable cause?

What happens if CDP is not enabled on a switch port to which an IP phone is connected?