Cisco CCNP Advanced Call Control and Mobility Services (300-815 CLACCM) v1.2

Voice outages, failed SIP trunks, and toll fraud land directly on the IT Director's desk, and many collaboration teams inherit CUBE and CUCM configurations they did not build. This course gives collaboration engineers the advanced call control depth to troubleshoot and secure that environment.

Role fit: Designed for network administrators and collaboration engineers with three to five years of Cisco collaboration experience. It is a strong fit for teams supporting CUCM and CUBE environments, with related coverage for CME and SRST scenarios. It also fits Team Leads preparing staff for the 300-815 CLACCM concentration exam toward CCNP Collaboration. Learners new to collaboration should start with CLCOR (350-801) first.

Risk and compliance relevance: Skills cover CUBE and CUCM toll fraud prevention, TLS and SRTP for securing ITSP traffic, and troubleshooting call setup, media establishment, and CUCM call control elements. These are practical controls for reducing fraud exposure and protecting call quality.

Time investment: About 41 hours across 46 skills. Most skills run 45–70 minutes, so engineers can complete one or two per week without pulling them off production work.

Change-management note: The instructor repeatedly urges learners to practice debugs and test calls in a lab, not production. Plan for lab access so your team builds that muscle before they get paged at 3 a.m.

How CBT Nuggets supports the outcome: Demo-heavy skills follow the exam blueprint. Scenario-based validation sections close each skill. Team Reporting and Playlists help Training Managers sequence the SIP, CUBE, and CUCM troubleshooting skills and track progress toward the 300-815 CLACCM exam objectives.

Collaboration teams rarely get a quiet window to train. Problems surface as tickets: a SIP trunk is out of service, inbound calls fail, caller ID shows the wrong number, or Extension Mobility logins stop working. This course prepares your team to handle those moments. Instructor Lalo Nunez demonstrates each topic in a working lab environment, including calls placed through CUBE and gateway scenarios, so IT practitioners see how a working configuration looks and how a broken one behaves.

• Faster root-cause isolation on call failures: Your team learns to read SIP call flows in Wireshark and debug output. They also practice checking SIP registration status, reviewing SIP message debugs such as debug ccsip messages, and using CUBE voice trace tools, so engineers can tell what looks right in a call flow and what doesn't.
• More reliable call control troubleshooting: Engineers work through CUCM, CUBE, gateway, and Extension Mobility scenarios in a lab environment before applying those concepts in production. That gives branch and remote-site issues a safer place for validation before changes reach live users.
• Reduced toll fraud and carrier risk: The course covers toll fraud prevention on both CUBE and CUCM. It also covers securing ITSP connections with TLS, SRTP, and certificates, which tightens your organization's exposure at the network edge.
• Predictable call routing across sites and clusters: Your team practices route lists and route groups, translation and transformation patterns, location precedence, and ILS. This reduces misrouted calls and caller ID errors.

The instructor recommends rehearsing debugs in a lab environment, not in production. That practice means your team won't be learning to read trace output for the first time after an overnight page.

Knowledge

• How SIP call flows work, including Early Offer, Delayed Offer, early media, PRACK, SIP UPDATE, session timers, and mid-call signaling for hold, resume, transfer, and conferencing
• How CUBE dial peers are matched and selected, including wildcards, POTS versus VoIP dial peers, voice translation rules and profiles, and codec preference lists
• How SIP profiles, signaling and media binding, and TLS with SRTP secure and shape traffic to an ITSP, including multi-tenant and registration-based SIP trunk options
• How CUCM call-control troubleshooting topics fit together, including route patterns, translation patterns, transformation patterns, and related call-routing behavior
• How advanced mobility and remote-site call-processing concepts in the CLACCM blueprint affect collaboration designs and troubleshooting
• Toll fraud prevention controls on both CUBE and CUCM

Ability

• Read a SIP call flow in Wireshark or a trace and spot what looks wrong during call setup and media establishment
• Configure CUBE dial plans, DTMF relay, and SIP header manipulation, and connect and secure an ITSP SIP trunk with TLS and SRTP
• Work with CUCM route patterns, translation patterns, and transformation patterns while troubleshooting call routing through CUBE or gateway paths
• Validate mobility and remote-site call-processing behavior in a lab before making production changes
• Troubleshoot CUBE and CUCM using show commands, debug voip ccapi inout, the CUBE voice trace tool, and downloaded CUCM traces
• Diagnose common Extension Mobility and SIP trunk failures and apply the right fix