IT Glossary



IP extension line

A line that terminates with an IP phone or voice endpoint that was shipped, installed, and in use and attached to an IP-enabled PBX or IP-PBX phone system.


Become a Client

Talk to Gartner now and learn the benefits of becoming a Gartner client.

Contact us Today
Free Research
Discover what 12,000 CIOs and Senior IT leaders already know.
Free Access