As of January 2021, ECL supports the Asterisk PBX. The open source PBX is fully local! Fully responsive. Fully virtual.  Not cloud-based.

Asterisk can handle an unlimited number of users.  It is free from vendor license and operational encumbrances.

Asterisk is also free from hacker-infected and complex public cloud infrastructure.

We can upgrade 3CX, Panasonic, Mitel, and other cloud base PBXs to Asterisk.

Contact Sales for more info.