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afterthenumber

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

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    Category: SIP

    Implementing Loop Prevention on CUBE

    We work quite a lot with a single ITSP in our smaller deployments, but keep hitting a problem with number porting.  We’re repeatedly facing a problem whereby… Read more “Implementing Loop Prevention on CUBE”

    December 7, 2015March 18, 2016 by jonathan

    Unity Call Extended for Recording Fails

    While implementing an Auto Attendent today, we faced a challenge as the client did not want to pay for professional recordings, and needed to implement quickly. If… Read more “Unity Call Extended for Recording Fails”

    December 7, 2015March 23, 2016 by jonathan

    Lua Script Solves Call Forward Masking

    Had to implement an Auto Attendant in Unity today.  The client had a requirement to send after-hours calls out to the PSTN, but had to be routed… Read more “Lua Script Solves Call Forward Masking”

    December 7, 2015March 18, 2016 by jonathan

    SIP SRST Dialling Fails Due to Header Addressing – CSCur95578

    Haven’t been able to post in a while as my current project is keeping me very busy! As the core multi-cluster deployment is now complete, we’ve moved on… Read more “SIP SRST Dialling Fails Due to Header Addressing – CSCur95578”

    November 1, 2015May 20, 2016 by jonathan

    Lua Scripting – Replacing FQDN with IP in SIP Headers

    A friend of mine at Cisco TAC pinged me a few days ago, asking to assist him with a case he’s working on that required a sip normalization… Read more “Lua Scripting – Replacing FQDN with IP in SIP Headers”

    August 28, 2015March 18, 2016 by jonathan

    Lua Scripting – Proxied Manager Breaks MWI for Centralized CUC Behind SME

    I’ve been working as design and deployment lead on a globally significant full Collaboration on-premise deployment for the last 3 months (think 120 CUCM across 9 Leaf… Read more “Lua Scripting – Proxied Manager Breaks MWI for Centralized CUC Behind SME”

    August 8, 2015March 18, 2016 by jonathan

    Forcing MTP Killed the Mid-Call

    There’s a common misconception with Cisco SIP trunking that the desperate “Forced MTP” will always solve no audio, one-way audio, DTMF inter-working and every other media negotiation… Read more “Forcing MTP Killed the Mid-Call”

    August 8, 2015March 23, 2016 by jonathan

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