CCIE Collaboration case studies

CCIE Collaboration · Put your knowledge to work in context.

The CCIE Collaboration is Cisco's expert-level certification for collaboration engineers who design, deploy, and troubleshoot voice, video, and unified communications environments. It sits above associate and professional collaboration certifications and is aimed at people who already work hands-on with call control, gateways, endpoints, and collaboration applications and who want a credential that signals deep, practical expertise rather than broad familiarity. The CCIE Collaboration case studies are 5 cases and about 5,098 words.

Single Cluster, Seven Sites, 10 Mbps Spokes: Validating a Centralized Call-Control Design

A Dutch customer runs one Cisco Unified CM cluster on three servers (one publisher, two subscribers) in the Amsterdam data center, serving 3,360 endpoints across seven sites: HQ with 1,800 phones, three regional offices with 400 each, and three small offices with 120 each. The WAN is hub-and-spoke MPLS with 10 Mbps at every spoke, 110 ms round-trip to the farthest office, and 1% packet loss during peak hours.

1,011 words, about 5 min 2

Unity Connection HA Across 40 ms Metro Links: Rejecting the Proposal and Resizing Ports and Storage

HealthAlliance has 2,400 Cisco Unity Connection subscribers on a single physical server in Rotterdam. Voicemail is sized at 24 ports at HQ and 6 ports at a satellite clinic that reaches the cluster over a 12 Mbps link.

1,020 words, about 5 min 3

Post-Merger 4-Digit Collisions, Carrier SIP Formatting, and Site-Correct 911

After a merger, your cluster serves 12 sites and 10,000 endpoints on one publisher and two subscribers. The legacy PBXs used four-digit internal numbers, and the ranges now collide: former Acme sites use 3xxx and 4xxx, and former Bolt sites also use 3xxx and 4xxx.

1,040 words, about 5 min 4

Jabber MRA: Sign-In Works, Media Does Not, and Certificates Block BYOD

Contoso has 2,800 remote workers using Jabber through Mobile and Remote Access with a pair of Expressway-C (internal) and Expressway-E (DMZ) appliances. Expressway-E is dual-homed with static NAT.

1,017 words, about 5 min 5

6,000 Endpoints in a Six-Hour Window: Reworking an AXL Provisioning Run and Proving It Worked

Your team must provision 6,000 new 8845 endpoints, 6,000 lines, and 300 new directory numbers on a Cisco Unified CM 14 cluster (one publisher, three subscribers, 22,000 existing endpoints) inside a six-hour Sunday change window. A contractor wrote a Python script using AXL SOAP: 40 worker threads, one addPhone per device, then a separate addLine, then updatePhone to associate the line.

1,010 words, about 5 min