Useful information for installing, configuring and testing...
"Testing and setting up hybrid transformer units
Using and setting up fixed mobile radio sets with switch and line equipment.
Interfacing to a Yeasu VRX - 7000 Base station
Making Network Connections, and Cross-over lead details
There is no workaround not having the correct test equipment. But if you need to know those 600Ω levels
Connecting the TRip units to other devices
Selective Calling Tones Used in DRC-1 & DS32
If you cannot view the PDF files above then you may need to install Adobe Reader.