Switchvox - Does Switchvox support SIP encryption

Switchvox supports TLS/SRTP as a SIP Transport option for D-Series phone extensions on Switchvox Version 7.3.1 and higher.
This encrypts the communication between the D-Series phones and Switchvox.
TLS/SRTP is supported on line 1 of a Sangoma phone, for Main and Additional phone extensions.

Please refer to this KB Switchvox - Release Notes Version 7.3.1 Jan 6, 2020 for more information.

If you need to provide even higher security, to include any remote phones, a VPN connection should be setup between remote phone networks and the Switchvox server.