Free 300-815 sample questions
Real questions from the Implementing Cisco Advanced Call Control On-Premises (CLACC) practice bank, with the correct answer and an explanation for each one. No junk, no filler.
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A unified communications engineer is troubleshooting a new SIP trunk on a Cisco Unified Border Element (CUBE) connecting to a cloud provider. The provider requires the P-Asserted-Identity (PAI) header to be present for call authentication, but the Cisco UCM does not send it by default. The engineer decides to use a SIP Profile to add the PAI header. Which SIP Profile configuration snippet correctly copies the 'From' header URI to a new PAI header?
A hospital is implementing Extension Mobility across multiple UCM clusters located in different cities using EMCC. A doctor logs into a phone in City B, which is managed by Cluster B. The doctor's home cluster is Cluster A in City A. When the doctor makes an emergency PSTN call, which Calling Search Space (CSS) is used to route the call, and from which device pool is the media resource for Music On Hold (MOH) allocated?
During a SIP early media scenario, a call from a Cisco IP Phone to the PSTN via a CUBE fails intermittently. Analysis of SIP traces shows that for failed calls, the PSTN switch sends a 183 Session Progress message with SDP, but the CUBE does not forward it to the UCM. Instead, it waits and eventually times out. Successful calls proceed without a 183 message. What configuration on the outbound SIP dial-peer of the CUBE is required to reliably handle this early media scenario?
A company has two UCM clusters, one in North America (NA) and one in Europe (EU), connected via an SIP trunk. They have implemented ILS and Global Dial Plan Replication (GDPR) to share URI dialing information. An EU user tries to call an NA user's URI, but the call fails. A trace reveals that the EU cluster is not aware of the NA user's URI. Which two of the following are potential reasons for this failure? (Select TWO)
A network administrator is configuring a SIP SRST gateway for a branch office. The goal is to preserve as much phone functionality as possible during a WAN outage. Which configuration command is essential to allow SIP phones to re-register to the SRST gateway and maintain basic calling capabilities?
True or False: When configuring Standard Local Route Group (SLRG) in Cisco UCM, the route group selected for local calls is determined by the Device Pool assigned to the originating device, not by the route pattern's configuration.
A call center is experiencing issues where calls are dropped when an agent attempts a blind transfer to an external number through a CUBE. Call traces show the CUBE sends a SIP REFER message to the UCM, which UCM rejects. The call is between a PSTN caller and a SIP agent phone. What is the most likely cause of this transfer failure?
A retail company is using Cisco UCM's native call queuing feature for its customer service line. During peak hours, all agents are busy, and callers are placed in a queue. The requirement is that if a caller has been in the queue for more than 5 minutes, their call should be routed to an external answering service. Which set of configuration items is needed to achieve this?
A collaboration engineer needs to implement toll fraud prevention on a CUBE that connects to a public SIP trunk provider. The provider uses a large, undefined range of IP addresses for signaling. The engineer wants to ensure that only legitimate calls from the UCM are allowed to be routed out the SIP trunk. Which method provides the most effective security in this scenario? graph TD UCM[Cisco UCM Cluster] -- SIP --> CUBE[Cisco CUBE] CUBE -- SIP --> Internet((Internet)) Internet --> ITSP[ITSP Cloud]
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