AC
Attachment Circuit

The physical or virtual circuit attaching a CE to a PE. An AC can be a Frame Relay DLCI , an ATM VPI / VCI , an Ethernet port, a VLAN , a HDLC , a connection on a physical interface, a PPP session from an L2TP tunnel, an MPLS LSP , etc.

If you enjoy using our glossary, here are some other useful resources you might like...

Get your weekly dose of telecoms terminology delivered straight to your inbox!

We promise, no spam - just clear-cut telecoms terms to keep you on top of your game.

Our YouTube channel offers over a hundred free videos (and counting!) covering a range of technology topics.

Subscribe to our channel to be the first to know when we release new videos:

FREE Intro to 5G Sample Course

Use this no-obligation free trial to get a taste of what it's like to be an Mpirical student.

Included with the trial is an all-access pass to the LearningZone, which contains learning tools and other useful resources to help you make the most of your training.