This document provides resources for users who experience echo through
their Virtual Central Office (VCO) network.
There are no specific requirements for this document.
The information in this document is based on these software and
The information in this document was created from the devices in a
specific lab environment. All of the devices used in this document started with
a cleared (default) configuration. If your network is live, make sure that you
understand the potential impact of any command.
For more information on document conventions, refer to the
Technical Tips Conventions.
"Echo Cancellation" is not a feature of the VCO/4K. In long-distance
transmission, be it through microwave, submarine cable, or satellite, echo is
almost always present and an echo canceller must be introduced when the echo
Here is a source for echo canceller products:
2500 Series Echo