CLCOR ON Premises Call Control Practice Test 4 — 15 Questions

Question 1

When designing a redundant CUCM deployment, which mechanism ensures that if a primary subscriber fails, phones automatically register to a secondary subscriber?

Accepted Answer

CM Group. A Cisco CallManager Group (CM Group) is an ordered list of CUCM nodes that is assigned to a Device Pool, which in turn is assigned to phones. The CM Group defines the primary subscriber and up to two backup subscribers; if the primary fails, phones fall back to the next node in the list in the order specified. This is the native CUCM device redundancy mechanism for phone registration.

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SIP Trunk Security Profile

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Route List

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Device Pool

Question 2

You need to prevent certain internal users from making international calls while allowing them to dial local numbers. What is the most efficient way to implement this in CUCM?

Accepted Answer

Assign a CSS to the device that includes a Partition containing local routes but excludes a Partition containing international routes.. A Calling Search Space (CSS) assigned to the device determines which partitions the device can search when matching dialed digits. By including a partition with local route patterns and excluding the partition containing international route patterns, the device simply cannot match international dialing patterns, so the call is blocked at the dial-plan level. This is the most efficient approach because it uses the existing CUCM dial-plan hierarchy rather than adding per-call filtering logic.

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Use an Application Dial Rule.

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Modify the device pool's location.

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Configure a Route Filter on the Route Pattern.

Question 3

If a Translation Pattern is configured in CUCM, at what stage of the call processing does the digit manipulation occur?

Accepted Answer

Before the Route Pattern is matched.. Translation patterns in CUCM perform digit manipulation before the Route Pattern is matched. This allows the translation pattern to modify the dialed digits so that they match the appropriate route pattern, enabling correct routing. The manipulation occurs during the digit analysis phase, prior to route selection.

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After the call is sent to the gateway.

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At the device level during registration.

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Only when the call fails to route.

Question 4

You are implementing a centralized dial plan. You have multiple sites, each with local PSTN gateways. How can you ensure that an emergency call from a specific site is always routed to the local PSTN gateway of that site?

Accepted Answer

Use site-specific partitions and assign the local gateway to a CSS that includes that partition.. Emergency calls (911/999/112) must always egress through the PSTN gateway physically closest to the caller so that the correct Public Safety Answering Point (PSAP) is reached. The reliable way to enforce this in a centralized dial plan is to place each site's local gateway in a site-specific partition, then assign each site's devices a Calling Search Space (CSS) that includes only that site's partition. This guarantees that when a device dials the emergency number, the matching route pattern in the local partition is the one that gets used.

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Use Transformation Masks on the device.

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Configure the location in the device pool to match the site.

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Create a separate CUCM cluster for each site.

Question 5

Which feature allows you to group multiple gateways and route lists to provide load balancing and failover for outbound calls?

Accepted Answer

Route List. A Route List is the CUCM object that groups one or more Route Groups (each containing gateways/trunks) in a prioritized order, providing both load balancing across members and failover to the next member if the first is unavailable. Route Lists are then referenced by Route Patterns to determine which gateways handle outbound calls. This makes them the correct answer for grouping gateways for outbound redundancy.

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Route Pattern

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Translation Pattern

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Device Pool

Question 6

In CUCM, what is the purpose of the 'Calling Search Space' (CSS)?

Accepted Answer

To define which partitions a device can access.. A Calling Search Space is an ordered list of partitions that a device or line is allowed to search when matching dialed digits. It effectively defines the class of service for that device by determining which route patterns, translation patterns, and directory numbers it can reach. Without a CSS, a device has no partitions to search and cannot complete any calls beyond its own registered DN.

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To define the codec used for calls.

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To define the physical location of the device.

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To define the bandwidth limit of a call.

Question 7

You are configuring a SIP trunk between CUCM and a CUBE. Which setting is critical to ensure that the SIP signaling is encrypted?

Accepted Answer

SIP Trunk Security Profile. The SIP Trunk Security Profile in CUCM defines the security settings for a SIP trunk, including whether TLS is used for signaling encryption and whether digest authentication is enabled. To ensure SIP signaling is encrypted, the profile must be configured with a 'Secure' transport (TLS) and applied to the trunk. This is the critical setting that controls encryption of SIP messages between CUCM and CUBE.

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Enterprise Parameters

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Device Pool

Answer

SIP Profile

Question 8

Where do you configure the time zone for a specific set of devices, such as those in a specific branch office?

Accepted Answer

Date/Time Group. The time zone for a specific set of devices, such as those in a branch office, is configured using a Date/Time Group in CUCM. A Date/Time Group defines the time zone and date/time format, and it is assigned to devices via device pools. This allows different groups of devices to have different time zones based on their location.

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Region

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Enterprise Parameters

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Location

Question 9

A user complains that they cannot see the 'Transfer' softkey on their phone during an active call. Where is the most appropriate place to check the softkey configuration?

Accepted Answer

Device > Device Settings > Softkey Template. Softkey templates in Cisco Unified Communications Manager define which softkeys appear on a phone during different call states, and they are configured under Device > Device Settings > Softkey Template. The template is then associated with a device pool or directly with a phone, but the actual softkey definitions (including Transfer) live in the template. Checking the template is the correct first step to verify whether the Transfer softkey is enabled for the connected/active call state.

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System > Enterprise Phone Configuration

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Device > Device Pool

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Device > Phone

Question 10

When a call is made to a destination that matches multiple partitions in a user's CSS, how does CUCM determine which pattern to use?

Accepted Answer

Longest match rule.. Cisco Unified Communications Manager (CUCM) uses the longest match rule when a dialed number matches multiple patterns across the partitions in a calling search space (CSS). The system evaluates all patterns in the CSS partitions and selects the one with the most specific (longest) match to the dialed digits. This ensures that more specific dial plans take precedence over generic ones, which is critical for correct call routing.

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The pattern configured first.

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Random selection.

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The pattern with the lowest partition index.

Question 11

You are integrating an external voicemail system with CUCM. Which object is used to define the dialable number that users call to reach their voicemail box?

Accepted Answer

Voicemail Pilot. The Voicemail Pilot is the CUCM object that defines the actual dialable number (directory number) users dial to reach the voicemail system — for example, 5000 for Unity Connection. It acts as the routing anchor that points CUCM to the voicemail server, and it is referenced by the Voicemail Profile. Without a Voicemail Pilot, CUCM has no number to send calls to when a phone's voicemail button is pressed or a busy/no-answer condition triggers a forward to voicemail.

Answer

Voicemail Profile

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Route Pattern

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Translation Pattern

Question 12

You are migrating a legacy PBX to CUCM. You need to normalize incoming caller IDs from the PSTN to E.164 format. Which tool is best suited for this at the gateway level?

Accepted Answer

Calling Party Transformation Pattern. Calling Party Transformation Patterns are applied at the gateway or trunk level to normalize the calling party number (ANI) into E.164 format before the call is routed within CUCM. They can be assigned to a gateway, trunk, or route list, and they manipulate the calling number using digit manipulations (prefix, strip, etc.). For normalizing incoming PSTN caller IDs, this is the correct tool because it specifically targets the calling party field.

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Translation Pattern

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Route Filter

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Route Pattern

Question 13

Which component allows for automatic rerouting of a call if the primary gateway is busy or unreachable?

Accepted Answer

Route List. A Route List provides ordered, prioritized routing by grouping multiple Route Groups and enabling automatic failover when the primary gateway is busy, unreachable, or returns an error. It is the CUCM component that delivers redundancy for outbound call routing.

Answer

Partition

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Device Pool

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Route Group

Question 14

Which service in CUCM is responsible for handling the registration of SIP devices?

Accepted Answer

Cisco CallManager. The Cisco CallManager service (Cisco CallManager, often abbreviated CCM) is the core call-processing service in CUCM that handles SIP device registration, call routing, and signaling. SIP phones and gateways register with the CallManager service running on a CUCM node, which maintains the registration state and provides call control.

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Cisco Database Layer Monitor

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Cisco CTIManager

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Cisco TFTP

Question 15

What is the function of a 'Device Pool' in CUCM?

Accepted Answer

To group shared settings for devices.. A Device Pool in CUCM groups devices that share common settings such as region, date/time group, softkey template, SRST reference, and media resource group list. It simplifies bulk configuration by allowing administrators to apply these settings to many phones at once rather than per-device.

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To define user permissions.

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To manage media resources.

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To control call routing.