Click here

CO

Short for central office. In telephony, a CO is a telecommunications office centralized in a specific locality to handle the telephone service for that locality. Telephone lines are connected to the CO on a local loop. The CO switches calls between local service and long-distance service. ISDN and DSL signals also channel through the CO.



Top Terms

Connect with Webopedia

  • What is 250 GB Data Usage?

    What is 250 GB (250 gigabytes) and why is this phrase so popular? Webopedia explains what the phrase 250 GB means in reference to data storage...

    Read More »

Did You Know? Archive »

  • Quick Reference Archive »