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Cisco 300-815 CLACCM practice questions

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Question 1Call Control and Dial Planning

On a Cisco Unified Communications Manager cluster, which entity is the primary dial-plan element that matches dialed digits and directs calls to a destination such as a route pattern, translation pattern, or directory URI?

  1. A partition
  2. A route pattern Correct answer.
  3. A device pool
  4. A calling search space

Explanation

Route patterns are the primary dial-plan components that match dialed digits and determine where a call is routed. They can point to gateways, trunks, or other patterns and may include wildcards and digit-discard instructions. Calling search spaces and partitions control which patterns a device can reach but do not themselves define destinations.

Question 2Call Control and Dial Planning

An administrator wants a route pattern that matches any four-digit extension beginning with 2. Which pattern accomplishes this?

  1. 2.XXX
  2. 2XXX Correct answer.
  3. 2XXXX
  4. 2[0-9]

Explanation

In Unified CM route patterns, the wildcard X matches any single digit from 0 through 9. The pattern 2XXX therefore matches exactly four digits where the first is 2 and the remaining three are any digit. The dot wildcard matches one or more digits and would not constrain the length to four.

Question 3Call Control and Dial Planning

Which statement describes the function of a translation pattern in Unified CM?

  1. It manipulates the called or calling number and then re-runs digit analysis. Correct answer.
  2. It maps a directory number to a physical phone button template.
  3. It assigns codec policy based on the originating device pool.
  4. It converts an incoming PRI channel into an IP bearer stream.

Explanation

A translation pattern rewrites digits, such as the called party number, calling party number, or both, and then the modified number is analyzed again against the calling search space configured on the translation pattern. This makes it a common tool for number normalization and for redirecting blocks of numbers. It does not perform media conversion or codec policy.

Question 4Call Control and Dial Planning

What is the purpose of a route group in a Cisco Unified Communications Manager dial plan?

  1. It provides the time-of-day schedule that controls call routing.
  2. It defines the ordered list of gateways and trunks that a route list can use. Correct answer.
  3. It stores the global dial-plan directory numbers for all users.
  4. It specifies the digit analysis order for all partitions in the cluster.

Explanation

A route group is an ordered collection of gateways and trunks that share the same routing characteristics. A route list references one or more route groups and applies them in priority order, which enables distribution and failover across gateways. Route groups do not perform digit analysis or scheduling themselves.

Question 5Call Control and Dial Planning

Which Unified CM feature allows a dialed number to be routed differently depending on the time of day and day of week?

  1. Time-of-day routing Correct answer.
  2. Digit analysis
  3. Forced authorization code
  4. External call transfer

Explanation

Time-of-day routing uses time periods, time schedules, and time-of-day routing groups to direct calls based on the current time and day. A partition is associated with a time schedule so that patterns in that partition are only reachable during the defined window. This is commonly used to send after-hours calls to a different destination.

Question 6Call Control and Dial Planning

A route pattern is configured with the discard digits instruction PreDot on the pattern 9.@. What is sent to the destination when a user dials 95551234?

  1. 555123
  2. 5551234 Correct answer.
  3. 95551234
  4. 9555123

Explanation

The PreDot discard instruction removes everything before the dot in the pattern, which in 9.@ is the leading 9 used for an outside line. The remaining digits 5551234 are sent to the destination. This is the standard technique for stripping an access code before sending the call to the PSTN.

Question 7Call Control and Dial Planning

An administrator needs a route pattern that matches any number beginning with 011 followed by seven to fifteen additional digits. Which pattern is most appropriate?

  1. 011. Correct answer.
  2. 011XXXXXXXXXXXXXXX
  3. 011XXXXXXX
  4. 011!#

Explanation

The dot wildcard matches one or more digits, so 011. matches the international prefix followed by any number of additional digits. It is the usual way to represent variable-length international dialing. Fixed X patterns constrain the length too tightly for international numbers.

Question 8Call Control and Dial Planning

What is the effect of the @ wildcard in a Unified CM route pattern?

  1. It matches only digits that are defined in a dial plan filter.
  2. It represents the complete national numbering plan for the configured country. Correct answer.
  3. It matches any single digit from 0 through 9.
  4. It matches one or more digits and is used for variable-length dialing.

Explanation

The @ macro wildcard represents the full set of valid digits for the national numbering plan of the country specified in the cluster's dial plan configuration. It is used to build patterns such as 9.@ that route any valid PSTN number. It is not a single-digit wildcard and is not defined by a filter.

Question 9Call Control and Dial Planning

A translation pattern is configured with the called party transformation mask XXXX applied to the pattern 1XXX. A user dials 1234. What is the resulting called number after translation?

  1. 234
  2. 123
  3. 1XXX
  4. 1234 Correct answer.

Explanation

The transformation mask XXXX keeps all four digits of the matched number, so 1234 remains 1234. Masks use X to retain a digit and other characters to replace it, so a mask of XXXX applied to a four-digit match yields the same digits. This question tests understanding that the mask length and content determine the output.

Question 10Call Control and Dial Planning

Which element determines the order in which partitions are searched when a device places a call?

  1. The route list priority order
  2. The translation pattern sequence number
  3. The calling search space partition order Correct answer.
  4. The device pool region setting

Explanation

A calling search space contains an ordered list of partitions, and Unified CM searches those partitions in the order listed when performing digit analysis. Placing a partition higher in the calling search space gives its patterns priority. Route lists and device pools do not control digit analysis order.

Question 11Call Control and Dial Planning

A user reports that dialing a four-digit internal extension fails, but the same extension is reachable from another department. Which configuration should be checked first?

  1. The maximum number of calls on the SIP trunk
  2. The codec region assigned to the user's device pool
  3. The calling search space assigned to the user's device and line Correct answer.
  4. The date/time group of the cluster publisher

Explanation

When some users can reach a number and others cannot, the most likely cause is that the failing device's calling search space does not include the partition holding the matching pattern. Verifying the device and line calling search spaces is the first step. Codec, time, and trunk capacity issues would not produce a pattern-specific reachability difference.

Question 12Call Control and Dial Planning

Which statement about partitions is correct?

  1. A partition replaces the need for a route group.
  2. A partition must be assigned to exactly one calling search space.
  3. A partition can contain only directory numbers and never route patterns.
  4. A partition groups patterns and directory numbers so access can be controlled by calling search spaces. Correct answer.

Explanation

Partitions are logical groupings of directory numbers and patterns, and calling search spaces reference partitions to control which numbers a device can reach. A partition can hold both directory numbers and patterns, and it can be referenced by multiple calling search spaces. It does not replace route groups.

Question 13Call Control and Dial Planning

What is the function of a route list in Unified CM?

  1. It assigns a calling search space to a gateway.
  2. It provides an ordered set of route groups to try in sequence for a matched pattern. Correct answer.
  3. It stores the translation pattern used for inbound caller ID.
  4. It converts dialed digits into an E.164 number before analysis.

Explanation

A route list references one or more route groups and tries them in order, providing distribution and failover for outbound calls. When a route pattern points to a route list, the first available route group is used and later groups serve as backups. A route list does not perform digit conversion or caller ID translation.

Question 14Call Control and Dial Planning

An administrator creates a route pattern 9.@ that points to a route list containing two route groups. The first route group has no available channels. What happens when a user dials an outside number?

  1. The call is routed using the next route group in the list. Correct answer.
  2. The call is queued until a channel in the first route group is free.
  3. The call is rerouted to the last route pattern in the partition.
  4. The call fails immediately with a busy tone.

Explanation

Route lists provide automatic overflow: if the first route group has no available resources, Unified CM tries the next route group in the list. This behavior supports failover across gateways and trunks. The call is not queued indefinitely and does not fail while an alternate group is available.

Question 15Call Control and Dial Planning

Which Unified CM configuration object is used to apply a consistent set of transformation settings to calls entering or leaving a SIP trunk?

  1. A device pool
  2. A SIP profile
  3. A media resource group
  4. A transformation pattern Correct answer.

Explanation

Transformation patterns apply digit transformations to calling or called numbers based on a matching pattern, and they are commonly associated with trunks to normalize numbers entering or leaving the cluster. SIP profiles control SIP header behavior rather than digit transformation. Device pools and media resource groups serve other purposes.

Question 16Call Control and Dial Planning

A translation pattern is configured with the pattern 4XXX and the called party transformation mask 8XXX. A user dials 4123. What called number results?

  1. 812
  2. 8123 Correct answer.
  3. 8XXX
  4. 4123

Explanation

The mask 8XXX replaces the first digit with 8 and retains the remaining three digits, producing 8123. The X positions in the mask retain the corresponding digits from the matched number, while the literal 8 overrides the first position. This is a common way to prefix internal numbers for external routing.

Question 17Call Control and Dial Planning

Which calling search space configuration causes a route pattern in partition PSTN to be searched before a pattern in partition INTERNAL?

  1. PSTN listed above INTERNAL in the calling search space. Correct answer.
  2. INTERNAL listed above PSTN in the calling search space.
  3. Both partitions assigned to the same route group.
  4. The PSTN partition assigned to a device pool.

Explanation

Unified CM searches partitions in the order they appear in the calling search space, from top to bottom. Listing PSTN before INTERNAL means patterns in PSTN are evaluated first. Route groups and device pools do not affect partition search order.

Question 18Call Control and Dial Planning

What is the purpose of a dial plan filter in Unified CM?

  1. It limits the number of concurrent calls per partition.
  2. It restricts which digits the ! wildcard matches in a route pattern. Correct answer.
  3. It filters SIP headers on inbound trunk calls.
  4. It defines the codec priority for a region.

Explanation

Dial plan filters are associated with the ! wildcard so that a pattern can match only numbers that satisfy the filter, such as numbers beginning with a specific area code. This allows broad patterns to be constrained without listing every digit. Filters do not affect SIP headers, call limits, or codecs.

Question 19Call Control and Dial Planning

An administrator wants calls to a specific external number to be blocked for all users. Which approach uses dial-plan elements to accomplish this?

  1. Configure a SIP profile that rejects the number.
  2. Assign the number to a device pool with no region.
  3. Create a route pattern for the number in a partition that no calling search space includes. Correct answer.
  4. Add the number to the route list as the last route group.

Explanation

Placing a blocking route pattern in a partition that no calling search space references prevents digit analysis from matching it, effectively blocking the number. Alternatively, a route pattern can point to a black-hole route group. Device pools, route list order, and SIP profiles do not block specific dialed numbers.

Question 20Call Control and Dial Planning

A cluster has a route pattern 9.@ pointing to a route list, and a translation pattern 9.@ in a higher-priority partition that rewrites the number to an internal extension. What happens when a user dials 95551234?

  1. The route pattern is matched first because it is in the route list.
  2. Both patterns are applied and the call is duplicated.
  3. Digit analysis fails because two patterns match the same digits.
  4. The translation pattern is matched first and the call is redirected to the internal extension. Correct answer.

Explanation

Digit analysis evaluates partitions in calling search space order, so the higher-priority partition containing the translation pattern is searched first. Once the translation pattern matches, it rewrites the number and the call proceeds to the new destination. Unified CM does not duplicate the call or fail solely because another pattern could also match.

Question 21Call Control and Dial Planning

Which statement about the difference between a translation pattern and a transformation pattern is correct?

  1. A transformation pattern can only change the calling number, while a translation pattern can only change the called number.
  2. A translation pattern requires a device to be assigned to it, while a transformation pattern does not.
  3. A translation pattern is used only for inbound calls, while a transformation pattern is used only for outbound calls.
  4. A translation pattern is part of digit analysis and can redirect a call, while a transformation pattern rewrites numbers on a trunk without affecting digit analysis. Correct answer.

Explanation

Translation patterns participate in digit analysis and can change the destination of a call by rewriting the called number and re-analyzing it. Transformation patterns are applied to calls traversing a trunk and modify calling or called numbers without redirecting digit analysis. Both can modify calling and called numbers.

Question 22Call Control and Dial Planning

Which Unified CM component provides a shared list of directory numbers that can be reached by dialing a short internal code?

  1. A media resource group
  2. A directory number associated with a device and placed in an internal partition Correct answer.
  3. A route group
  4. A line group

Explanation

Internal extensions are directory numbers assigned to lines and placed in a partition that internal calling search spaces include. This lets users reach the extension with a short code. Route groups, line groups, and media resource groups serve routing, hunt, and media functions rather than defining reachable extensions.

Question 23Call Control and Dial Planning

What does the escape character ! do when used in a route pattern?

  1. It ends the pattern and treats the following characters as literal.
  2. It duplicates the preceding digit.
  3. It matches one or more digits and can be constrained by a dial plan filter. Correct answer.
  4. It matches any single digit.

Explanation

The exclamation point is a wildcard that matches one or more digits and is often paired with a dial plan filter to restrict which numbers are allowed. It is useful for variable-length patterns that need a filter. It is not a single-digit wildcard and does not act as a terminator.

Question 24Call Control and Dial Planning

A user dials a number that matches a route pattern pointing to a gateway. The call fails with a cause code indicating no route. Which dial-plan element is the most likely cause?

  1. The device pool has the wrong region.
  2. The route pattern has no route list or gateway associated with it. Correct answer.
  3. The translation pattern has the wrong mask.
  4. The calling search space has too many partitions.

Explanation

A route pattern must reference a destination such as a gateway, trunk, or route list to complete the call. If no destination is associated, digit analysis matches the pattern but the call cannot be routed, producing a no-route condition. Region, mask, and partition count issues produce different symptoms.

Question 25Call Control and Dial Planning

Which configuration allows a cluster to route calls to an external number using the PSTN while stripping the access code and presenting a full E.164 number?

  1. A translation pattern with no mask and a route group containing only one gateway.
  2. A route pattern with PreDot discard and a called party transformation mask that prefixes the country code. Correct answer.
  3. A SIP profile that removes the access code from the SIP URI.
  4. A device pool with a region that matches the gateway.

Explanation

Combining a PreDot discard with a called party transformation mask lets the cluster strip the access code and add the country code before sending the call to the gateway. This produces a properly formatted E.164 number on the PSTN trunk. The other options do not perform both digit operations.

Question 26Call Control and Dial Planning

Which Unified CM object directly associates a set of directory numbers with a partition so that those numbers can be reached through a calling search space?

  1. A region
  2. A route group
  3. A SIP trunk
  4. A line (directory number) configuration Correct answer.

Explanation

Each directory number is assigned to exactly one partition in its line configuration; that partition makes the DN reachable from any calling search space that contains it. Route groups and SIP trunks handle external egress, and regions govern codec selection, not dial-plan reachability.

Question 27Call Control and Dial Planning

A calling search space contains partitions in the order: LOCAL, CORP, PSTN. A user dials 2000, which exists in both CORP and PSTN. Which number receives the call?

  1. Neither, because duplicate DNs across partitions cause an error
  2. The PSTN directory number, because the PSTN partition holds external numbers
  3. The CORP directory number, because CORP is searched before PSTN Correct answer.
  4. Both, because Unified CM forks the call to every match

Explanation

Unified CM searches partitions in the order they are listed in the calling search space and stops at the first partition containing a matching pattern or DN. Because CORP precedes PSTN, the CORP DN wins and the PSTN DN is never considered. Duplicates across partitions are legal and are resolved purely by partition order.

Question 28Call Control and Dial Planning

Which route pattern most precisely matches a seven-digit local number that begins with 5, while still accepting any trailing digits?

  1. 5XXXXXXX
  2. 5XXXXXX Correct answer.
  3. 5!
  4. 5.XXXXXX

Explanation

Each X matches exactly one digit, so 5XXXXXX matches a leading 5 followed by exactly six more digits - a seven-digit number. The other patterns either match the wrong length or use wildcards that change the matching rules.

Question 29Call Control and Dial Planning

What is the primary purpose of a route group in Unified CM?

  1. To translate called numbers before routing
  2. To define the ordered set of gateways and trunks that can carry a call Correct answer.
  3. To assign partitions to directory numbers
  4. To define codec policy between sites

Explanation

A route group lists the gateways or trunks that a route list may use, in the order they should be tried. Partitions belong to DNs, translation happens in translation and transformation patterns, and codec policy belongs to regions.

Question 30Call Control and Dial Planning

A translation pattern is configured with pattern 5XXX and called party transformation mask 7XXX. A user dials 5234. What number is used for subsequent routing?

  1. 7234 Correct answer.
  2. 5234
  3. 5234 followed by 7
  4. 7342

Explanation

The mask replaces the matched digits position by position, so the leading 5 becomes 7 and the remaining digits are preserved, yielding 7234. The translated number is then used for the next routing decision.

Question 31Call Control and Dial Planning

Which wildcard in a Unified CM route pattern matches one or more digits and is the standard choice for variable-length PSTN dialing?

  1. X
  2. #
  3. !
  4. @ Correct answer.

Explanation

The @ wildcard matches one or more digits and is the conventional way to build variable-length PSTN patterns such as 9.@. X matches exactly one digit, the exclamation point is an escape character, and # is not a route-pattern wildcard.

Question 32Call Control and Dial Planning

Which statement describes the relationship between a route list and a route group?

  1. A route list and a route group are the same object with different names
  2. A route group references one or more route lists to select a gateway
  3. A route list references one or more route groups and defines the order in which they are tried Correct answer.
  4. A route list assigns partitions to route patterns

Explanation

A route list is an ordered collection of route groups; Unified CM tries the first route group, then falls to the next if the call cannot be completed. Route patterns point at route lists, and route groups contain the actual gateways and trunks.

Question 33Call Control and Dial Planning

A route pattern 9.@ is configured with the discard digits instruction PreDot. A user dials 91234567890. What number is sent to the destination?

  1. 91234567890
  2. 1234567890 Correct answer.
  3. 123456789
  4. 9

Explanation

PreDot discards everything up to and including the dot, so the leading 9 and the dot are removed and 1234567890 is sent. This is the standard way to strip an access code before sending digits to the PSTN.

Question 34Call Control and Dial Planning

An administrator wants calls to a specific international destination to be rejected without creating a route pattern that points to a gateway. Which approach accomplishes this?

  1. Create a translation pattern that matches the destination and block it by leaving the partition out of all calling search spaces Correct answer.
  2. Create a device pool with no location
  3. Create a route group with no members
  4. Create a region with no codecs

Explanation

A translation pattern that matches the target number and is placed in a partition no user CSS contains will never be reached, but the more common blocking technique is to place a translation pattern with the Block This Pattern option enabled in a partition that is searched before the real route. Either way, dial-plan elements, not gateways, perform the block.

Question 35Call Control and Dial Planning

Which Unified CM object applies a consistent set of calling search space and transformation settings to calls arriving from a gateway?

  1. A gateway configuration with its own CSS and inbound called-party transformation Correct answer.
  2. A SIP profile
  3. A region
  4. A device pool

Explanation

The gateway configuration itself carries the calling search space used for inbound calls and the inbound called-party transformation settings, so those values are applied consistently to every call arriving on that gateway. Device pools group devices for other settings, SIP profiles tune SIP behavior, and regions control codecs.

Question 36Call Control and Dial Planning

A user in a department can dial internal extensions but cannot reach the PSTN. Other departments can. What is the most likely cause?

  1. The user's calling search space does not include the partition containing the PSTN route pattern Correct answer.
  2. The region assigned to the phone lacks a codec
  3. The directory number is not assigned to a partition
  4. The route group has too many members

Explanation

If internal dialing works, the DN and its partition are configured correctly, which points to the CSS. A CSS that omits the partition holding the PSTN route pattern prevents the pattern from ever being matched, so the call is rejected.

Question 37Call Control and Dial Planning

What does a dial plan filter do in Unified CM?

  1. It limits the number of concurrent calls through a route group
  2. It restricts the codecs offered to a device
  3. It filters SIP headers on inbound trunks
  4. It restricts which partitions a calling search space may contain based on the filter's allowed patterns Correct answer.

Explanation

Dial plan filters, used with the Line/Device approach, allow administrators to build a CSS from a set of partitions while excluding partitions whose patterns do not match the filter. They are a dial-plan construct, not a media or signaling control.

Question 38Call Control and Dial Planning

An administrator needs a route pattern that matches any number starting with 011 followed by seven to fifteen additional digits. Which pattern is correct?

  1. 011.XXXXXXXXXXXXXXX Correct answer.
  2. 011XXXXXXXXXXXXXXX
  3. 011XXXXXXX
  4. 011!#

Explanation

The dot is a separator that does not consume digits, so 011.XXXXXXXXXXXXXXX matches the 011 prefix plus up to fifteen X positions. To enforce a minimum length, additional patterns or a translation pattern are used, but the dot form is the standard way to express the prefix plus variable trailing digits.

Question 39Call Control and Dial Planning

A translation pattern 4XXX with mask 8XXX is in partition TRANS, which appears first in a user's CSS. The user dials 4123, and a route pattern 4XXX exists in a later partition. What happens?

  1. Both patterns match and the call is rejected as ambiguous
  2. The translation pattern is ignored because it has no gateway
  3. The route pattern matches because translation patterns are evaluated last
  4. The translation pattern matches first and the call is routed using 8123 Correct answer.

Explanation

Translation patterns participate in the same partition-ordered search as route patterns, so the pattern in the earlier partition wins. The mask rewrites the digits to 8123, and that number is then used for the next routing decision.

Question 40Call Control and Dial Planning

Which statement best distinguishes a translation pattern from a transformation pattern?

  1. A translation pattern only rewrites calling numbers, while a transformation pattern only rewrites called numbers
  2. A translation pattern requires a route group, while a transformation pattern does not
  3. A translation pattern applies only to internal calls, while a transformation pattern applies only to external calls
  4. A translation pattern is matched during dial-plan lookup and rewrites digits, while a transformation pattern is applied to a call's calling or called number as it passes a device or trunk Correct answer.

Explanation

Translation patterns are dial-plan entries that match dialed digits and rewrite them before further routing. Transformation patterns are applied at a defined point in the call path, such as on a gateway or trunk, to modify the calling or called number.

Question 41Call Control and Dial Planning

A cluster has a route pattern 9.@ in partition PSTN and a translation pattern 9.@ in partition TRANS. A user's CSS lists TRANS before PSTN. What is the result when the user dials 95551212?

  1. The translation pattern is used and its mask is applied before routing continues Correct answer.
  2. Both are applied in sequence
  3. The call fails because two patterns match
  4. The route pattern is used because route patterns always take precedence

Explanation

Partition order in the CSS determines which pattern is matched first, and TRANS precedes PSTN. The translation pattern therefore wins and its mask rewrites the digits before the routing search continues.

Question 42Call Control and Dial Planning

A user reports that dialing a four-digit internal extension fails, but the same extension works from another department. Which two items should be verified first?

  1. The user's calling search space and the partition assigned to the target DN Correct answer.
  2. The SIP profile and the trunk destination
  3. The region codec and the location bandwidth
  4. The device pool and the date/time group

Explanation

Internal dialing depends on the target DN's partition being present in the caller's CSS. If another department can reach the extension, the DN itself is fine, so the difference is almost certainly the CSS or the partition assignment.

Question 43Call Control and Dial Planning

Which configuration allows a cluster to route calls to the PSTN while stripping the access code before the digits reach the gateway?

  1. A route group with a single gateway
  2. A route pattern with the discard digits instruction PreDot pointing to a route list Correct answer.
  3. A translation pattern with no mask
  4. A SIP profile with a normalization script

Explanation

The PreDot discard instruction removes everything up to and including the dot in the route pattern, stripping the access code before the digits are sent to the gateway. Translation patterns and SIP normalization can also rewrite digits, but the discard instruction on the route pattern is the direct mechanism.

Question 44Call Control and Dial Planning

An administrator wants to apply a transformation to the calling number of all calls leaving a specific gateway. Which configuration object is the correct place to apply it?

  1. The line's partition
  2. The gateway's calling party transformation settings Correct answer.
  3. The device pool's region
  4. The route pattern's discard digits

Explanation

Calling party transformation settings on the gateway (or on a trunk) rewrite the calling number as the call exits that device. Discard digits affect called digits, regions affect codecs, and partitions affect reachability.

Question 45Call Control and Dial Planning

A route pattern 9.@ points to a route list with two route groups. The first route group's gateway returns a cause code indicating no available channels. What does Unified CM do next by default?

  1. It fails the call immediately
  2. It tries the next route group in the route list Correct answer.
  3. It reorders the route groups permanently
  4. It falls back to the second partition in the CSS

Explanation

When a route group cannot complete the call, Unified CM proceeds to the next route group in the route list, which provides redundancy. The route list order is not changed, and CSS partitions are not revisited because the pattern already matched.

Question 46Call Control and Dial Planning

An administrator needs to block a range of premium-rate numbers while still allowing all other PSTN calls. Which design achieves this with the fewest objects?

  1. Create a route group containing only the premium-rate gateway
  2. Remove the PSTN partition from every user's CSS
  3. Add a second route list with no route groups
  4. Place a translation pattern matching the premium range with Block This Pattern enabled in a partition searched before the general PSTN partition Correct answer.

Explanation

A translation pattern with Block This Pattern enabled in a higher-priority partition intercepts matching calls before the general PSTN route pattern is reached, blocking only the targeted range. Removing the PSTN partition would block all external calls, and route groups do not block patterns.

Question 47Call Control and Dial Planning

A called party transformation mask is applied to a translation pattern, and the resulting number no longer matches any route pattern in the CSS. What is the most likely outcome?

  1. The call is routed to the default gateway
  2. The call is routed using the original digits
  3. The translation pattern is skipped and the search restarts
  4. The call fails because no pattern matches the transformed number Correct answer.

Explanation

After a translation pattern rewrites the digits, the new number is used for the next routing decision. If no route pattern in the CSS matches that rewritten number, the call cannot be routed and fails.

Question 48Call Control and Dial Planning

Which statement about the interaction between route patterns and translation patterns in the same partition is correct?

  1. Unified CM always prefers translation patterns over route patterns
  2. Unified CM always prefers route patterns over translation patterns
  3. Unified CM selects the longest matching pattern, and ties are broken by the calling search space order Correct answer.
  4. Unified CM rejects the call when both match

Explanation

Within the dial plan, Unified CM prefers the most specific (longest) match, and partition order in the CSS breaks ties when matches are otherwise equivalent. There is no inherent preference for translation patterns or route patterns.

Question 49Call Control and Dial Planning

A cluster uses the Line/Device approach with dial plan filters. An administrator adds a new partition to the filter's allowed list but users still cannot dial the numbers in it. What is the most likely reason?

  1. The region must be updated
  2. The SIP profile must be reloaded
  3. The partition must also be added to the device's CSS or the filter must be reapplied to rebuild the CSS Correct answer.
  4. The route group must be restarted

Explanation

Dial plan filters build a CSS from partitions that match the filter, so a newly added partition must satisfy the filter and the resulting CSS must be rebuilt or the partition added directly. Route groups, regions, and SIP profiles play no part in this CSS construction.

Question 50Call Control and Dial Planning

An administrator configures an external phone number mask of 2125551234 on a directory number, and the PSTN gateway is set to send calling party number as the external phone number mask. A user with extension 4001 and this mask places a call. Which calling number does the gateway present to the PSTN?

  1. 2125554001, because the mask is combined with the last digits of the extension
  2. 4001, because the directory number always overrides the mask on gateway calls
  3. 2125551234, because the external phone number mask replaces the calling number for off-net calls Correct answer.
  4. 2125551234 plus the extension appended, because both are sent as calling party information

Explanation

The external phone number mask is a per-line setting that defines the full directory number the system presents to external callers when the gateway is configured to use it as the calling party number. When the gateway uses the external phone number mask, the mask value itself is sent, so the PSTN sees 2125551234 rather than the four-digit internal extension. This is how a cluster publishes a consistent public number for internal users.