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Thoughts and experiences of a Cisco Collaboration engineer after clearing the CCIE lab…

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    Tag: SIP

    Extracting CUCM SIP Trunk Information using SQL

    I am currently overseeing a large multi-cluster deployment with literally hundreds of SIP trunks spanning almost 10 leaf clusters, plus SME.  Maintaining configuration standardization on deployment with… Read more “Extracting CUCM SIP Trunk Information using SQL”

    December 2, 2019December 2, 2019 by jonathan

    Supporting CUBE NAT Integrations without Firewall ALG

    Overview Recently had a customer which wanted to connect to a public ITSP (Flowroute). Their network design required a dual-interface CUBE deployment model, with an “inside” private… Read more “Supporting CUBE NAT Integrations without Firewall ALG”

    December 21, 2018December 23, 2018 by jonathan

    CSCug20588 – Auto-Reg Failure – “Could not insert new row – duplicate value in a UN”

    Had an issue that’s affected multiple deployments that I’ve been working on.  At one of my clients in particular, this reached an escalation level.  Just sharing this… Read more “CSCug20588 – Auto-Reg Failure – “Could not insert new row – duplicate value in a UN””

    May 25, 2016April 18, 2018 by jonathan

    Cisco Meraki Managed Communciations MC74 IP Phone Released

    Cisco Meraki have released a new cloud-managed phone. Gotta say I love the look of the elegant slim-line design. The key to this deployment model’s appeal can… Read more “Cisco Meraki Managed Communciations MC74 IP Phone Released”

    May 19, 2016May 19, 2016 by jonathan

    CUBE URI-based Routing and Multiple Via Headers

    Cisco introduced some pretty cool URI enhancements for CUBE from 15.4(1)T that have added some great extensions to the CUBE feature set, and specifically include some fine-grained SIP routing… Read more “CUBE URI-based Routing and Multiple Via Headers”

    May 19, 2016May 19, 2016 by jonathan

    CUCM Video Codec Preferences Support – CSCuw53802

    Colleague called me for assistance with a video call that wouldn’t set up when dialling in to a VC bridge. The call flow was from a Polycom… Read more “CUCM Video Codec Preferences Support – CSCuw53802”

    May 18, 2016May 18, 2016 by jonathan

    VoIP Bandwidth Calculations

    If you’re preparing for a your CCIE Written or Lab exams, or (far more importantly) if you need to perform bandwidth sizing for a VoIP design or… Read more “VoIP Bandwidth Calculations”

    May 15, 2016April 13, 2017 by jonathan

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