The Terminating Trunk Transmission (TTT) (non-interactive) feature provides for extension number access to three tone sequences that can be used for trunk transmission testing from the far end of the trunks.
The three test types should have extension numbers assigned on the Maintenance-Related System Parameters screen:
Test Type 100:___ Test Type 102:___ Test Type 105:___
Test Type 100 provides:
5.5 seconds of 1004-Hz tone at 0dB
Quiet until disconnect; disconnect is as per the administered time interval.
Test Type 102 provides:
9 seconds of 1004-Hz tone at 0dB
1 second of quiet
This cycle is repeated until disconnect; disconnect is forced after 24 hours.
