The Transmitter Steering Systems document you were looking for is no longer available.
You may find what you are looking for on the Radio System Monioring pages: https://ctiproducts.com/MCN_Systems.html
Datasheet for the TSAM™ Transmitter Steering Unit: https://ctiproducts.com/documents/mcn/datasheets/TSAMDataSheet.pdf
The following documentation may reference TSAM: