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300-815Updated 3d ago · Oct 1, 2026

300-815 CLACC: Implementing Cisco Advanced Call Control On-Premises

245 questions across 1 topics, with suggested answers, explanations where available, and imported community discussion. The first 24 questions are free to preview.

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Question 1 · Advanced Call Control Open

Users report that several inter-site calls are failing and that the message “not enough bandwidth” appears on the display. Voice traffic between locations traverses the corporate WAN, and Call Admission Control is enabled to limit the number of calls between sites. How can the issue be resolved without increasing bandwidth utilization on the WAN links?

Answer: B Cisco Unified CM Automated Alternate Routing (AAR) automatically reroutes an endpoint call through the PSTN or another configured alternate network when Call Admission Control denies it because insufficient location/WAN bandwidth is available. This preserves the Call Admission Control limit and avoids adding voice traffic to the WAN links. **Learn more:** [Cisco Unified CM: Configure Automated Alternate Routing](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/12_5_1/systemConfig/cucm_b_system-configuration-guide-1251/cucm_b_system-configuration-guide-1251_chapter_01010100.html) · [Cisco Unified CM: Call Admission Control Overview](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/12_5_1/systemConfig/cucm_b_system-configuration-guide-1251/cucm_b_system-configuration-guide-1251_chapter_011100.html)
Question 2 · Supplemental Features and Security Open

What capability does the gateway-preferred, network-based recording option provide in Cisco UCM?

Answer: B Gateway-based recording has the voice gateway fork media toward the recording destination, and Cisco Unified Communications Manager integrates with that destination through a SIP trunk. Gateway-preferred selection uses the eligible gateway in the media path as the preferred recording media source. **Learn more:** [Cisco: Configure and Troubleshoot Basic Call Recording](https://www.cisco.com/c/en/us/support/docs/unified-communications/unified-communications-manager-callmanager/200788-Call-Recording-Basic-Configuration-and-T.html) · [Cisco Unified Communications Manager Release 15 Recording Guide](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/cucm_b_feature-configuration-guide-for-15/cucm_mp_r53f7ff4_00_recording-12-0.html)
Question 3 · Advanced Call Control Open

A Collaboration engineer is implementing call-processing capabilities on Cisco UCM and must configure Call Queuing to hold callers in a queue until hunt members become available to answer. Which action must be completed before this feature can be configured?

Answer: B Cisco UCM requires the Cisco IP Voice Media Streaming (IPVMS) Application to be activated on at least one cluster node before Call Queuing configuration. IPVMS provides the media-streaming capability used by queued calls; announcements, Music On Hold, and Hunt Pilot Queuing are subsequent Call Queuing configuration tasks. **Learn more:** [Cisco Unified Communications Manager—Configure Call Queuing](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/cucm_b_feature-configuration-guide-for-15/cucm_m_configure-call-queuing.html)