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Cheat sheets, templates and lab-tested configurations written by our instructors. Choose a resource, enter your email and we'll send it straight to your inbox.
  • PDF cheat sheetSIP

    SIP Response Codes & Call Flow Cheat Sheet

    Every SIP response class, the headers that matter and annotated ladder diagrams for the six call flows you troubleshoot most.

    • 1xx–6xx codes with likely causes
    • Basic, early-media and PRACK call flows
    • SDP offer/answer quick reference
  • TemplateCisco

    Globalised Dial Plan Design Template

    A spreadsheet template for designing +E.164 globalised dial plans in CUCM, including partitions, CSS and transformation patterns.

    • Site and number-range planner
    • Partition/CSS matrix
    • Calling and called transformation worksheet
  • Config packCUBE

    Cisco CUBE Configuration Examples

    Annotated, lab-tested CUBE configurations for the scenarios engineers ask about most.

    • ITSP trunk with registration
    • Teams Direct Routing baseline
    • Webex Calling Local Gateway
    • Toll-fraud hardening checklist
  • GuideTeams

    Teams Voice Routing & Direct Routing Guide

    How Teams decides where a call goes: dial plans, normalisation rules, voice routing policies, PSTN usages and SBC routes, explained with diagrams.

    • Routing decision flowchart
    • PowerShell command reference
    • Direct Routing go-live checklist
  • PDF cheat sheetCisco

    CUCM Operational Best Practices

    The checks experienced CUCM engineers run before upgrades, after changes and during incidents.

    • Pre-upgrade checklist
    • Backup and DRS verification
    • RTMT alerts worth enabling
    • Trace collection quick guide
  • Study planCertification

    2026 Certification Study Plans

    Week-by-week study plans for CLCOR 350-801 v2.0, CLACC, CLHCT and MS-721, with lab milestones and practice-exam checkpoints.

    • 13-week CLCOR v2.0 plan
    • 8-week CLACC / CLHCT plans
    • 8-week MS-721 plan

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