CLCOR · domain
ON Premises Call Control
This domain covers on-premises call control in Cisco Unified CM: dial plan elements, route lists and route groups, partitions and calling search spaces, device and line configuration, softkey templates, call pickup, and device mobility. Questions present configuration scenarios and ask where to verify or change settings, or how to control call routing and registration behavior.
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What to know about ON Premises Call Control
Be able to trace a call from dialed digits through translation patterns, route patterns, route lists, and route groups, and to locate where a feature like Transfer or Call Pickup is enabled. The key is knowing which configuration object actually controls the behavior being changed.
Route lists, route groups, and trunk selection order for outbound calls
Partitions, calling search spaces, and translation patterns for dial plan control
Softkey templates and device or line configuration for feature access
Device pools, regions, locations, and registration priority for endpoints
Watch out for
Common ON Premises Call Control exam traps
- ▸Confusing route group order inside a route list with route list order in a route pattern, which changes which provider is tried first.
- ▸Editing the phone's softkey template directly instead of checking the device pool or common device configuration that assigns it.
- ▸Assuming a calling search space on the phone grants access, when the line CSS and partition membership actually control dialing.
Question index
All ON Premises Call Control questions (71)
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A Cisco Unified Communications Manager (CUCM) cluster is configured with a SIP trunk to a Cisco Unified Border Element (CUBE) for PSTN connectivity. Users report that outbound calls to a specific area code fail, but all other calls succeed. The CUCM route pattern for that area code is configured with a route list that includes the SIP trunk. The CUBE shows that it receives the INVITE but rejects it with a 488 Not Acceptable Here. Which CUCM configuration should be checked first to resolve this issue?
Hard2Which service must be running for a phone to receive its configuration file?
Easy3You are troubleshooting a scenario where internal calls between two sites are failing. The call fails immediately when dialed. What is the most effective way to verify that the Calling Search Space (CSS) has access to the destination partition?
Medium4You have a cluster with multiple nodes. You want to ensure that phones in the 'New York' office prioritize registration to a 'New York' subscriber. How do you implement this?
Hard5Which TWO of the following are valid types of Media Resources in CUCM?
Medium6Which field in a Route Pattern can be used to discard the first few digits of a dialed number before routing?
Medium7What is the function of 'Cisco Unified Reporting' in a CUCM environment?
Medium8A Cisco Unified CM cluster is configured with a SIP trunk to a Cisco Unified Border Element (CUBE). Calls from the PSTN arrive at CUBE and are sent to CUCM. The ITSP requires that the From header contain the original calling number in E.164 format, but CUCM is sending it in a 10-digit national format. You need to ensure the From header is rewritten to include the +1 prefix. Which configuration on CUCM will accomplish this?
Hard9When configuring a Device Pool in CUCM, which parameter is responsible for defining the set of codecs used between devices in different regions?
Easy10A collaboration engineer is implementing a dial plan that requires all calls to emergency services (911) to be routed over a specific SIP trunk to a dedicated PSAP gateway, regardless of the calling device's location. Which CUCM configuration element should be used to ensure this routing?
Hard11Where do you configure the time zone for a specific set of devices, such as those in a specific branch office?
Easy12You are migrating to a new SIP provider. You have a requirement to use 'Early Offer' for all calls on this trunk. Where is this configured?
Hard13Which CUCM service must be activated in Serviceability to allow for the use of the 'Cisco Extension Mobility' feature?
Easy14What is the primary function of a 'Location' object in CUCM?
Medium15You have a requirement to play a custom announcement when a call is placed on hold. Where do you configure this?
Medium16Which file does an IP phone download first to obtain its configuration from the TFTP server?
Easy17A Cisco Unified CM administrator is troubleshooting a call that fails with a 'No Route to Destination' cause code. The called number is 2001, which is an internal extension on a remote cluster. The local cluster has a SIP trunk to the remote cluster and a route pattern of 2XXX pointing to that trunk. The SIP trunk is up, but the call fails. What is the most likely cause?
Hard18Where do you define the default dial plan for a new CUCM cluster?
Easy19Which service must be active for CTI applications (like Cisco Finesse) to control phones?
Medium20A user dials a number that matches a route pattern configured with the 'Urgent Priority' check box selected. What is the effect of this setting on the dialing behavior?
Easy21A branch office has a limited bandwidth link. You need to ensure that no more than 5 calls can be made across the WAN at once. What should you configure?
Hard22A Cisco Unified Communications Manager cluster is using a SIP trunk to an ITSP. The ITSP sends calls to the enterprise with a +1 prefix, but the enterprise dial plan uses 10-digit numbers without the country code. You need to strip the +1 from the incoming calling and called numbers before they are presented to the dial plan. Where should you configure this translation?
Medium23A user reports that their calls are failing when they roam to a different physical office site. You observe that the device is registered to the primary CUCM cluster but the Location-based CAC is blocking the call. What is the most likely cause?
Hard24Which component in the CUCM dial plan allows you to match a pattern and simultaneously transform it into a new number before the final route lookup?
Medium25Which feature allows you to group multiple gateways and route lists to provide load balancing and failover for outbound calls?
Medium26You are troubleshooting a scenario where internal calls between two offices are using the G.711 codec, but you want them to use G.729 to save bandwidth. Where should you change the codec setting?
Medium27What is the primary difference between a 'Route Pattern' and a 'Translation Pattern'?
Hard28In CUCM, what is the purpose of the 'Calling Search Space' (CSS)?
Easy29You 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?
Hard30A user reports that when they dial an internal extension, they hear a fast busy tone. The administrator checks the dialed number and confirms it exists in the CUCM database. Which configuration element should the administrator verify first to resolve the fast busy tone?
Easy31When a call is made to a destination that matches multiple partitions in a user's CSS, how does CUCM determine which pattern to use?
Medium32A user reports that they cannot hold an active call when the Media Resource Group List (MRGL) is configured with a specific Transcoder. The CUCM trace shows 'Allocation Failure'. What is the most likely cause?
Hard33What is the function of a 'Device Pool' in CUCM?
Easy34Which THREE types of media resources can be managed by an MRGL?
Easy35Which THREE of the following tasks are required to set up a basic SIP trunk in CUCM?
Hard36A user reports that when they dial an internal extension, they hear a fast busy tone. The administrator checks the CUCM configuration and finds that the user's phone is registered and the dialed extension exists. Which CUCM component is responsible for determining that the dialed digits are a valid internal extension and routing the call?
Easy37If a Translation Pattern is configured in CUCM, at what stage of the call processing does the digit manipulation occur?
Medium38An administrator needs to restrict a group of phones from making long-distance calls. Which component of the CUCM dial plan should be modified to achieve this while maintaining internal dialing?
Hard39Which tool can be used to perform a bulk import of users and devices into CUCM?
Medium40Which menu path in CUCM Administration is used to configure the 'Cisco Unified Communications Manager Group'?
Easy41You are troubleshooting a one-way audio issue. The phone can register, but no audio is heard. What should you check first?
Hard42You have implemented 'Local Route Group' in your dial plan. What is the main advantage of using this instead of static Route Groups?
Hard43You are implementing a 'Call Hunt' sequence. You want to ensure that if no agent answers within 20 seconds, the call moves to the next member in the list. Which configuration object manages this timer?
Medium44Which TWO of the following fields are required when defining a Route Pattern?
Medium45When adding a new phone, what is the 'Device Name' parameter based on by default?
Easy46A user is unable to use their 'Speed Dial' button. What is the first thing you should verify?
Hard47You 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?
Hard48A user's Cisco IP Phone 8841 is registered to Cisco Unified Communications Manager but cannot place calls to any internal or external numbers. The phone displays 'Registration Complete' but every call attempt results in a fast busy tone. Which configuration element is most likely missing or misconfigured for this phone?
Easy49You need to implement redundancy for a remote site using Survivable Remote Site Telephony (SRST). Which parameter in the Device Pool ensures that the phones fail over to the local router during a CUCM WAN outage?
Hard50Which object acts as the primary container for a specific set of users in CUCM?
Easy51An administrator configures a Translation Pattern of 9XXX in partition INTERNAL_PT with Calling Search Space ROUTE_CSS. A user in partition USER_PT with CSS ROUTE_CSS dials 8001. The Translation Pattern is fully matched, and its Called Party Transformation CSS is set to TRANSFORM_CSS. Which calling search space is used to search for the final translated pattern after the digit transformation is applied?
Hard52Which THREE components are part of the CUCM redundancy architecture?
Easy53You 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?
Hard54Which TWO of the following are valid methods to handle digit manipulation in CUCM?
Medium55Which component allows for automatic rerouting of a call if the primary gateway is busy or unreachable?
Medium56Which TWO features are managed by the 'Cisco Unified Serviceability' tool?
Medium57When using 'Call Pickup', how does a user pick up a call that is ringing on another phone in the same pickup group?
Hard58A 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?
Medium59What is the default behavior of CUCM when a phone is moved to a new site and registers with the local CUCM node, but the Device Pool is not updated?
Easy60What is the purpose of the 'Common Device Configuration' in CUCM?
Medium61Which THREE of the following items can be defined within a Device Pool?
Hard62Which service in CUCM is responsible for handling the registration of SIP devices?
Medium63When designing a redundant CUCM deployment, which mechanism ensures that if a primary subscriber fails, phones automatically register to a secondary subscriber?
Medium64A Cisco Unified Communications Manager (CUCM) administrator is configuring a new phone for a user. The user needs to be able to dial internal extensions, local PSTN numbers, and international numbers. The administrator has created a device pool, a line, and a directory number. Which additional configuration is required to allow the phone to place calls to the PSTN?
Medium65Which protocol is used by IP phones to register with the Cisco Unified Communications Manager?
Easy66Which THREE parameters are affected when you change the 'Location' of a device?
Hard67You are configuring a SIP trunk between CUCM and a CUBE. Which setting is critical to ensure that the SIP signaling is encrypted?
Medium68You 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?
Hard69You have configured a Cisco Unified CM Route List with two Route Groups: one containing a SIP trunk to Provider A and another containing a SIP trunk to Provider B. You want calls to be attempted to Provider A first, and only if that fails, to Provider B. Which Route List configuration ensures this behavior?
Medium70You are designing a dial plan with a centralized PSTN egress. What must you configure to ensure that local extensions can be dialed directly across sites?
Hard71You want to implement 'Presence' so users can see the status of other users. Which service must be running on the IM and Presence server?
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Frequently asked questions
- What does the ON Premises Call Control domain cover on the CLCOR exam?
- Be able to trace a call from dialed digits through translation patterns, route patterns, route lists, and route groups, and to locate where a feature like Transfer or Call Pickup is enabled. The key is knowing which configuration object actually controls the behavior being changed.
- How many questions are in this domain?
- This page lists all 71 ON Premises Call Control questions in the CLCOR question bank. The actual exam draws from this domain proportionally to its weighting in the official exam blueprint.
- What is the best way to practise this domain?
- Start with a short focused session (10 questions) to identify gaps, then work through explanations. Repeat with a longer session once the weak areas feel solid.
- Can I practise only ON Premises Call Control questions?
- Yes — the session launcher on this page filters questions to this domain only. Choose any session length for inline explanations and scoring.