Overview I’ve recently written a Tcl script using Cisco’s Tcl IVR Voice Gateway API. The script provides Time of Day routing. It offers the ability for streaming audio… Read more “IOS-based Tcl IVR Solution for Pre-Call Media and Business-Hours Schedule Announcements”
Category: IOS Devices
Uncovering IOS 15.x and IOS-XE Licensing for the Uninitiated
Cisco licensing is as best a mild irritation, but in reality, an impossibly poor, yet growing set of ill-conceived disparate implementations. IOS-XE and IOS v15.x licensing is… Read more “Uncovering IOS 15.x and IOS-XE Licensing for the Uninitiated”
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”
Phone Upgrades Fail Due to Upgrade Dependency
This is not a new issue, but it comes up often enough that searching for the exact version each time has started to irritate me… This post… Read more “Phone Upgrades Fail Due to Upgrade Dependency”
Interpreting MGCP Debug Parameters
I manage a number of deployments that still feature ISDN extensively, so debug mgcp packet is something that I’m reading off IOS CLI on a fairly routine basis at… Read more “Interpreting MGCP Debug Parameters”
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”
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”
ISR G2 PVDM3 Video Conferencing Deprecated
If you are in the process of preparing for the CCIE lab, you will be interested and very happy to see this! A terrible “feature” finally put… Read more “ISR G2 PVDM3 Video Conferencing Deprecated”
CUBE SIP Profiles – Normalizing Incorrect RURI/To Headers using Diversion
Had a strange requirement today. Needed to replicate a behaviour that is apparently quiet common on Asterisk, but haven’t seen it before myself. Our ITSP implemented a… Read more “CUBE SIP Profiles – Normalizing Incorrect RURI/To Headers using Diversion”
Incorrect SIP Realm – CUBE Not Responding to 401 Unauthorized
Had an issue today where we had to migrate a client as our ITSP migrated the client to a different SBC platforms. After re-pointing, the SIP Trunk was failing… Read more “Incorrect SIP Realm – CUBE Not Responding to 401 Unauthorized”
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