FoundationsFoundation
SIP & VoIP Fundamentals
Understand exactly how a voice call works on an IP network, from SIP signalling and SDP negotiation to RTP media, codecs and QoS.
Foundation for 350-801 CLCOR
- Video
- 14 h
- Labs
- 5
- Lab time
- 10 h
$149
Flagship · Cisco CUBE training
Cisco CUBE & SBC Academy
The session border controller is where Cisco, Microsoft and carriers meet, and where the hardest voice problems live. Our flagship academy takes you from SIP fundamentals to designing multi-carrier, multi-site voice routing, taught by engineers who have integrated CUBE with dozens of carriers.
Outcomes
What you'll be able to do
- Read and troubleshoot any SIP call flow
- Design scalable dial-peer architectures
- Normalise any carrier's SIP with SIP profiles
- Secure internet-facing trunks with TLS, SRTP and toll-fraud controls
- Deploy CUBE as a Webex Local Gateway and Teams Direct Routing SBC
- Design multi-carrier interconnects and multi-site routing
Certifications covered
Exams this academy prepares you for
- 350-801 CLCOR v2.0
Voice Gateways and SBCs
10% of the core exam
- 300-815 CLACC v2.0
Cisco Unified Border Element
CCNP concentration
- MS-721
Direct Routing
Within Teams Phone (40–45%)
- CCIE Collaboration
Call Control & Edge Services
CUBE appears throughout
Certification roadmap
Your route, at a glance
Learning path
The CUBE & SBC Academy curriculum
9 stages, each taught through hands-on labs. Take them in order, or start where your experience allows.
- 01Foundation
SIP Fundamentals
Methods, responses, dialogs and SDP: the language every SBC speaks.
- SIP methods
- SDP offer/answer
- RTP
Taught in: SIP & VoIP - 02Foundation
SIP Call Flows
Basic, early-media, PRACK, transfer and forking flows, read as ladder diagrams.
- Ladder diagrams
- Early media
- Re-INVITE
Taught in: SIP & VoIP - 03Professional
SIP Troubleshooting
A repeatable method for failed calls, one-way audio and DTMF problems.
- Trace triage
- Media isolation
- DTMF interworking
Taught in: SIP Troubleshooting - 04Professional
CUBE Fundamentals
Platforms, licensing, call legs and dial-peer matching.
- Dial peers
- Inbound/outbound matching
- Voice class URI
Taught in: CUBE Professional - 05Professional
Advanced CUBE
SIP profiles, header passing, transcoding and box-to-box high availability.
- SIP normalisation
- Transcoding
- HA
- 06Professional
Security
TLS, SRTP, trusted lists and toll-fraud prevention for internet-facing trunks.
- TLS/SRTP
- Toll-fraud controls
- Rate limiting
Taught in: CUBE Professional - 07Professional
Webex Calling Local Gateway
Register-based and certificate-based Local Gateway for Webex Calling.
- Control Hub
- LGW registration
- Hybrid routing
Taught in: Webex Calling - 08Expert
Provider Interconnects
Onboarding carriers, interop checklists and multi-carrier resilience.
- Carrier onboarding
- Server groups
- Failover
Taught in: Provider Interconnects - 09Expert
Multi-site Voice Routing
Regional breakout and consistent routing across CUCM, Webex, Teams and carriers.
- Least-cost routing
- Emergency calling
- Cross-platform routing
Courses
CUBE & SBC Academy courses
- SBCProfessional
SIP Troubleshooting Masterclass
A structured method for diagnosing failed calls, one-way audio, DTMF and registration problems from SIP traces, CUBE debugs and packet captures.
Supports 350-801 CLCOR
- Video
- 12 h
- Labs
- 4
- Lab time
- 16 h
$199 - SBCProfessional
Cisco CUBE Professional: SIP Trunking & Interworking
Master Cisco Unified Border Element: dial-peer design, SIP normalisation, security, transcoding, high availability and real carrier troubleshooting.
Supports 350-801 CLCOR
- Video
- 22 h
- Labs
- 7
- Lab time
- 28 h
$349 - CiscoProfessional
Webex Calling: Cloud and Hybrid Calling
Plan, deploy and operate Webex Calling: Control Hub, locations, numbering, Local Gateway, cloud PSTN and coexistence with CUCM.
Supports 350-801 CLCOR (Cloud and Hybrid Services)
- Video
- 16 h
- Labs
- 4
- Lab time
- 14 h
$299 - SBCProfessional
CUBE for Microsoft Teams Direct Routing
Connect Microsoft Teams Phone to the PSTN and to CUCM using Cisco CUBE as a certified Direct Routing SBC. This is the course where the two platforms meet.
Supports MS-721
- Video
- 10 h
- Labs
- 5
- Lab time
- 14 h
$249 - SBCExpert
SIP Provider Interconnects & Multi-site Voice Routing
Design and operate carrier interconnects and enterprise-wide voice routing: multiple ITSPs, regional breakout, number portability, emergency calling and failover.
Supports 300-815 CLACC
- Video
- 12 h
- Labs
- 3
- Lab time
- 18 h
$299 - CCIE & DesignExpert
Hybrid Enterprise Voice: Cisco and Microsoft Teams Interoperability
Design and run voice estates where Cisco CUCM, Webex Calling and Microsoft Teams coexist: shared dial plans, SBC architecture, migration and operations.
Design capstone (Train Collab certificate of completion)
- Video
- 16 h
- Labs
- 3
- Lab time
- 20 h
$399
Why CUBE matters
One border element, every platform
In a typical hybrid enterprise, a single CUBE pair terminates carrier SIP trunks, routes calls to CUCM, connects Microsoft Teams via Direct Routing and acts as the Webex Calling Local Gateway. This academy teaches every one of those roles, on this exact topology.
Hands-on
Labs for this academy
5 exercises
Cisco CUBE Labs
A full SIP trunking edge: CUBE, a simulated carrier and a CUCM cluster. Ideal for dial-peer design, SIP normalisation and security practice.
PSTN simulator ↔ CUBE ↔ CUCM cluster ↔ endpoints
GuidedSelf-pacedRentalEnterprise4 exercises
Webex Calling Labs
A Webex Calling organisation with a premises Local Gateway and CUCM, for cloud provisioning and hybrid coexistence practice.
Webex Calling ↔ Local Gateway (CUBE) ↔ CUCM and PSTN
GuidedEnterprise5 exercises
Microsoft Teams Direct Routing Labs
A dedicated Microsoft 365 tenant with Teams Phone licences, a certified SBC and a PSTN simulator. Real Direct Routing, not screenshots.
Microsoft 365 Teams Phone ↔ SBC ↔ PSTN simulator and CUCM
GuidedSelf-pacedRentalEnterprise
Your instructors
Learn from practitioners
Priya Raman
Sample profilePrincipal Instructor, CUBE & SIP Interworking
- CCIE Collaboration
- Cisco CUBE specialist
- SIP trunking for 40+ carriers
Priya spent a decade at a Tier-1 carrier integrating enterprise SBCs with SIP trunk services. She teaches dial-peer design, SIP normalisation and troubleshooting from real carrier traces.
Daniel Marsh
Sample profileLead Instructor, Cisco Collaboration
- CCIE Collaboration
- CCNP Collaboration
- Webex Calling specialist
Daniel has designed and migrated CUCM clusters for global enterprises and service providers, from 500-seat sites to 60,000-user multi-cluster deployments. He writes the CCIE mock labs and leads the live CCNP cohorts.
FAQ
Common questions
Is Cisco CUBE certified for Microsoft Teams Direct Routing?
Yes. Specific CUBE platforms and IOS XE releases are certified by Microsoft for Direct Routing. Always check Microsoft's current list of certified SBCs and Cisco's CUBE configuration guide for supported versions.
Do the labs include a real carrier?
Labs use a carrier-grade SIP simulator that reproduces common ITSP behaviours, such as registration, digest authentication, delayed offer and non-standard headers, so you can practise interop safely.
Where should I start if I'm new to SBCs?
Start at stage 1, SIP & VoIP Fundamentals. Engineers with solid SIP experience can begin at CUBE Fundamentals (Cisco CUBE Professional).
Is this useful for non-Cisco SBCs?
Yes. The SIP, normalisation, security and troubleshooting stages apply to any SBC. Configuration examples use Cisco CUBE.
Become the SBC engineer every project needs
All CUBE & SBC Academy courses and CUBE labs are included in the Professional plan.