Glossary
Each term has one page that explains it in plain English, with a diagram. Every guide links its terms here, so you never need to know the jargon before you start.
Each glossary page explains one term in plain English, with a diagram and the faults it's connected to. You don't need to know any jargon to use the fault guides: whenever a guide uses a term like DDI, SIP trunk or time profile, it links here.
The terms follow the call path: a SIP trunk brings the call in, the DDI decides where it goes, a time profile decides whether you're open, a hunt group decides who rings, and a voice VLAN keeps the desk phones on the network.
Meet the jargon in the order a call does
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Glossary
Free infographics for this topic
One-page summaries of each guide, free to print, pin or share with credit. Click one to open its guide, where you can download the PNG.
