Question 1

Which issue causes slips on a PRI?

Accepted Answer

Slips on a PRI (Primary Rate Interface) are often caused by an incorrect clock source, as the timing between the network and the device must be synchronized to prevent slips.

Question 2

Which two DNS records must be created to configure Service Discovery for or premises Jabber? (Choose two.)

Accepted Answer

The answer of Which two DNS records must be created...

Question 3

Which settings are needed to configure the SIP route pattern in Cisco Unified Communications Manager?

Accepted Answer

To configure a SIP route pattern in Cisco Unified Communications Manager, you need to specify the pattern usage, the IPv4 pattern, and the SIP trunk or Route list.

Question 4

Which configuration on Cisco Unified Communications Manager is required for SIP MWI to work?

Accepted Answer

The "Enable message waiting indicator" setting on the part group is required for SIP MWI to work.

Question 5

Which issue can occur if QoS is not deployed on a Cisco Collaboration architecture across the WAN?

Accepted Answer

Excessive jitter can occur if QoS is not deployed, as it helps prioritize voice and video traffic to ensure smooth communication across the WAN.

Question 6

A DTMF mismatch is occurring between an MGCP gateway registered FXS port and a Cisco Unified Communications Manager SIP trunk. Which media resource can be leveraged to interwork this mismatch?

Accepted Answer

A Media Termination Point (MTP) can be used to interwork DTMF mismatches between different signaling protocols, such as MGCP and SIP, by providing the necessary media conversion.

Question 7

Which wildcard must an engineer configure to match a whole domain in SIP route patterns?

Accepted Answer

The asterisk (*) is used as a wildcard to match any sequence of characters in domain names within SIP route patterns.

Question 8

A collaboration engineer must configure Cisco Unified Border Element to support up to five concurrent outbound calls across an Ethernet link with a bandwidth of 160 kb to the Internet Telephony Service Provider. Which set of commands allows the engineer to complete the task without compromising voice quality?

Accepted Answer

The iLBC codec is designed for narrowband speech and provides good voice quality at low bit rates, making it suitable for the 160 kb bandwidth constraint while supporting up to five concurrent calls.

Question 9

An engineer is designing a load balancing solution for two Cisco Unified Border Element routers. The first router (cube1.ab?.com) takes 60% of the calls and the second router (cube2.abc.com) takes 40% of the calls. Assume all DNS A records have been created. Which two SRV records are needed for a load balanced solution? (Choose two.)

Accepted Answer

The answer of An engineer is designing a load balancing...

Question 10

Due to provider requirements, outgoing calls from the Enterprise to the PSTN must start with channel 1. Which ISDN command changes the channel selection an IOS to meet this requirement?

Accepted Answer

The command "isdn bchan-number-order ascending" configures the ISDN B-channel selection to start from the lowest numbered channel, which is channel 1, meeting the requirement.

Question 11

An engineer must configure an MGCP gateway and register it to Cisco Unified Communications Manager. Which prerequisite must be met before applying the gateway commands to enable MGCP?

Accepted Answer

MGCP uses ports 2427, 2428, and 2727 for communication between the gateway and Cisco Unified Communications Manager.

Question 12

A network administrator deleted a user from the LDAP directory of a company. The end user shows as Inactive LOAP Synchronized User in Cisco Unified Communications Manager. Which step is next to remove this user from Cisco Unified Communications Manager?

Accepted Answer

The answer of A network administrator deleted a user from...

Question 13

Which two functions are provided by Cisco Expressway Series? (Choose two.)

Accepted Answer

The answer of Which two functions are provided by Cisco...

Question 14

How does an administrator make a Cisco IP phone display the last 10 digits of the calling number when the call is in the connected state, and also display the calling number in the E.164 format within call history on the phone?

Accepted Answer

Configure a calling party transformation pattern that keeps only the last 10 digits.

Question 15

After an engineer runs the utils ntp status command on the Cisco Unified Communications Manager publisher, the stratum value is 16. Which issue can the Cisco Unified CM cluster experience?

Accepted Answer

A stratum value of 16 indicates that the NTP server is not synchronized, which can lead to issues such as database replication not being synchronized across the Unified CM nodes.

Question 16

An engineer is designing a high availability and failover solution for two Cisco Unified Border Element routers. The first router (cube1.ab?.com) takes 60% of the calls and the second router (cube2.abc.com) takes 40% of the calls. Assume all DNS A records have been created. Which two SRV records are needed for a load balanced solution? (Choose two.)

Accepted Answer

The answer of An engineer is designing a high availability...

Question 17

An incoming off-net call to a user fails. An engineer notices that the off-net call is G.711, but the phone accepts only G.729. Which media resource on a Cisco Unified Border Element and Cisco Unified Communications Manager must the engineer configure to manage the codec negotiation?

Accepted Answer

A transcoder is used to convert between different codecs, such as G.711 and G.729, allowing the call to be successfully established despite the codec mismatch.

Question 18

Which packet delay is the maximum supported between Cisco Unified Communications Manager nodes for clustering over WAN deployments?

Accepted Answer

The answer of Which packet delay is the maximum supported...

Question 19

How does Cisco Unified Communications Manager perform a digit analysis on-hook versus off-hook for an outbound call from a Cisco IP phone that is registered to Cisco Unified CM?

Accepted Answer

On-hook, the user can dial the number and press "#" to indicate the end of dialing, allowing Unified CM to perform digit-by-digit analysis. Off-hook, Unified CM analyzes the entire string of digits once the user finishes dialing.

Question 20

A Cisco TelePresence SX80 suddenly has issues displaying main video to a display over HDMI. Which command can you use from the SX80 admin CLI to check the video output status to the monitor?

Accepted Answer

The answer of A Cisco TelePresence SX80 suddenly has issues...

Exam 42: Developing Applications using Cisco Core Platforms and APIs (DEVCOR)