GET http://IP address:port/prefix/control/telemetry/session/keepalive/[server_name]/[device_name]/[telemetry_name]?session_id=[id],
where server_name - Server name (see Get server list);
device_name - device name (see Get list of video sources (cameras));
telemetry_name - name of telemetry device (see Get list of telemetry devices for specified video source);
id - id of captured session (see Acquire telemetry control session).
Such request is to be sent not less than once in 10 seconds in order to keep the session alive. Otherwise telemetry control fails.