Over the coming weeks I will be running a new series here on Troubleshooting Voice. I often have students in class that report to me that one of the most difficult parts of their CCIE Voice exam experience was having to deal with the inner workings of some of the protocols and how to read and decipher them accurately. I have also begun to see this more and more across the various mailing lists and forums, and so I decided it was time to start an entire series on these not-to-be-feared topics.... Read More
People constantly have troubles understanding the Gatekeeper-based call routing model. In this post, we are going to discuss the basic call-routing logic. Reader is assumed to understand the most fundamental gatekeeper configuration commands. Basic Concepts The first concept is the gatekeeper technology-prefix, which is the core of the gatekeeper dynamic call-routing process. Look at the tech-prefix as a special label used to group together a set of VoIP gateways. The gateways may register... Read More

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