Enswitch is in production today on systems from tens to tens of thousands of live customers. More details (including links to the full list of features and a working demo of the web interface) are at:

http://integrics.com/products/enswitch/

New features in 2.3:

* Iotum integration. For more details, please see http://iotum.com/

* E911 provider integration.

* Simplified web interface for residential customers.

* SIP messaging support.

* Improved unlimited call IVR. This allows callers to transfer to any destination that costs you less than the revenue you earn from the inbound call. Users need no account. Allowed destinations are calculated in real time.

* Call back support for remote access.

* Rate plans can include minutes and SIP messages per month. Minutes and messages can optionally be rolled over for one month.

* Optional busy lamps component. Unlike the Asterisk "hint" mechanism, this works on a cluster with multiple Asterisk machines handling calls.

* Many smaller improvements based on customer feedback.