User guide

Aries Reference Manual Section 4 – Probes
Radio Systems Information Ltd. Page 77
5.6 Packet Data Testing
The probe may be configured to test Packet Data performance on the TETRA network.
The probe attempts to create a Packet Data connection typically every 1 minute or as specified by the user
in the probe configuration. The probe will attempt to download a test file using ftp protocol from the server
specified in the probe configuration. If the probe is unable to establish an Packet Data connection then an
error is reported. If the file is downloaded then the probe will check that the file has been received with no
errors and reports the time taken for the test file to be received.
The test file is typically 1kbyte and consist of pseudo-random data with the 2
nd
half of the file being a copy
of the first half – this allows any errors to be detected without the probe knowing in advance what the test
file data is. The test file should be in a non-password protected folder on the server so that the probe can
simply download the file using ftp protocol.
Note that the Aries probe will only attempt to download the test file – it does not attempt to upload data to
the server by changing the file or creating a new file.