Methods, systems, and apparatus for handling secure-voice-communication sessions

A method comprising:

• establishing an unsecured-voice-communication session over a base network;
• during the unsecured-voice-communication session, receiving input that initiates a secure-voice-communication session;
• terminating the unsecured-voice-communication session;
• using the base network to handle at least one call-management task associated with the secure-voice-communication session;
• and
• connecting to the secure-voice-communication session.

A system comprising:

• a secure-session-setup module installed on a secure-application subsystem and programmed to:
• receive, from a first voice-communication device, a first request to establish a secure-voice-communication session with a second voice-communication device;
• receive, from a second voice-communication device, a second request to establish the secure-voice-communication session with the first voice-communication device;
• and
• establish the secure-voice-communication session between the first and second voice-communication devices.