Our website provides a free download of TTI CertSoft 22.214.171.124. The program lies within System Utilities, more precisely Device Assistants. The actual developer of the free software is Terahertz Technologies Inc.
From the developer:
FTE5100, 7500, and 8000 Video Inspection Systems can be used to test fiber optic connections.
You may want to check out more software, such as Pari-tty, TTi Waveform Manager Plus or CallTTY, which might be similar to TTI CertSoft.