Cisco CCIE Collaboration

Calls succeed or fail on media. You negotiate codecs and capabilities, follow RTP and secure media, choose a DTMF method that crosses every hop, and use media optimization where paths are long.

• Session descriptions and capability negotiation
• RTP, RTCP and secure media
• DTMF methods and interworking between them
• Media path: flow-through against flow-around
• Media termination points and transcoding
• Optimizing media paths with ICE

You build A media path map for calls between three endpoint types, with DTMF verified across each.

Collaboration platforms are increasingly integrated by code. You use admin and messaging APIs, receive events through webhooks, and build a Webex bot from provided Python code.

• Administrative APIs for call control
• Cloud REST APIs for people, spaces and messages
• Authentication and tokens for integrations
• Webhooks and event handling
• Extending a Python bot skeleton
• Testing integrations safely

You build A Webex bot that responds to messages and reads data through an API.

Secure collaboration depends on trust that is easy to break. You secure signaling and media, run mixed mode, manage certificates and trust across components, and diagnose handshake failures.

• TLS for signaling and SRTP for media
• Certificate roles across call control, gateways and edge
• Public and private certificate authorities
• Mixed mode and endpoint security
• Trust lists and certificate renewal
• Diagnosing a TLS failure

You build A secured deployment with signed certificates and encrypted calls verified end to end.

Collaboration inherits every weakness of the network. You verify the DNS, time, DHCP and file transfer services endpoints need, and troubleshoot connectivity faults that present as call problems.

• DNS design for collaboration services
• NTP and why clocks break registration
• DHCP options for endpoints
• TFTP and provisioning file delivery
• Troubleshooting from the endpoint outward
• Capturing traffic to prove a network fault

You build A network readiness test plan and a worked fault where network services broke registration.

Bandwidth is finite and calls are fragile. You mark and queue voice, video and signaling correctly, apply admission control so one call too many does not ruin all of them, and measure quality.

• Marking voice, video and signaling
• Queuing and trust boundaries
• Locations-based call admission control
• RSVP-based admission control
• Bandwidth planning for video
• Measuring and diagnosing media quality

You build A QoS and admission control design for a three-site network, tested with simulated calls.

A dial plan has to work for hundreds of sites and for numbers no one has dialed yet. You design globalized plans, route by URI as well as by number, and share routing information across clusters.

• Global dial plan design in E.164 form
• Partitions, calling search spaces and transformations
• URI routing and SIP URI dialing
• Intercluster routing information sharing
• Emergency and special-number handling
• Tracing a call through a complex plan

You build A global dial plan for multiple clusters with number and URI routing, proven by traced calls.

Users judge a platform by its features. You configure telephony features on call control and in Webex Calling, choose codecs for each path, and make the two environments behave consistently.

• Call forwarding, park, pickup and hunt
• Shared lines, delegation and call queues
• Feature behavior in Webex Calling
• Codec selection by path and bandwidth
• Locations, numbers and users in the cloud
• Coexistence between on-premises and cloud calling

You build A feature set implemented on both platforms, with a table of differences.

Endpoints are where problems get reported. You register hardware and software endpoints, secure them, run IPv6 and mixed mode, and manage how users authenticate and are provisioned.

• Registering hardware phones and video systems
• Soft clients and their requirements
• Mixed mode and endpoint encryption
• IPv6 for collaboration endpoints
• Directory integration and user authentication
• Single sign-on for collaboration clients
• Troubleshooting registration and login

You build A mixed endpoint estate registered securely, with directory and sign-on working.

The border controller is where interoperability gets hard. You build CUBE trunks, normalize messages with profiles, secure the trunk, and design for redundancy.

• CUBE roles and call flows
• SIP trunk configuration and dial peers
• SIP profiles and header manipulation
• Normalization for provider interworking
• Securing and limiting the trunk
• Trunk redundancy and failover
• Troubleshooting a trunk that fails intermittently

You build A redundant SIP trunk with message normalization and verified failover.

Staff and partners call from outside the network. You deploy Expressway pairs, configure traversal through firewalls, and build Mobile and Remote Access so clients register from anywhere.

• Expressway-C and Expressway-E roles
• Firewall traversal and port planning
• Mobile and Remote Access configuration
• Business-to-business calling
• Certificates and DNS for the edge
• Troubleshooting an edge registration failure

You build A working Expressway pair that lets an external client register and call internally.

Meetings stress every part of the platform. You provide media resources and ad hoc conferencing, run Webex meetings with on-premises Video Mesh, secure meetings, and troubleshoot media quality.

• Media resource design and placement
• Ad hoc and scheduled conferencing
• Webex meetings and what they need from the network
• Video Mesh nodes and local media
• Meeting security and lobby controls
• Diagnosing audio and video quality in a meeting

You build A conferencing design with local media and meeting security, tested across sites.

Applications make the platform useful beyond calls. You deploy messaging and presence, voicemail, call recording and the Webex contact center, and make each integrate cleanly with call control.

• IM and Presence service deployment
• Voicemail integration and call handling
• Call recording architectures
• Webex Contact Center flows and routing
• Integrations with call control
• Troubleshooting application integrations

You build A set of integrated applications with a contact center flow, recording and voicemail.

Join every domain in one environment. You plan numbering and architecture, build call control, edge, media and applications, secure it, add cloud services, then find faults across the stack.

• Planning architecture, numbering and security
• Building call control, edge and media
• Adding applications and cloud services
• Securing and tuning for quality
• Locating faults across protocols and platforms

You build A complete collaboration lab with edge, media and applications, plus a fault log with fixes.