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”
Tag: ios
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”
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”
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”
Troubleshooting DTMF from ISDN PSTN
Sometimes we unfortunately still have legacy requirements to support ISDN that still need to upgrade to SIP Trunking. DTMF and even fax tones can be a pain… Read more “Troubleshooting DTMF from ISDN PSTN”
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”
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”
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