- Matching Transformer Line Input- Used as an input-matching transformer it connects telephone systems to most public address amplifiers for telephone paging. In addition it functions as an output-matching transformer to feed program material over a 600-ohm telephone line for "music-on-hold". It is compatible with any amplifier having a 25V output connection.- Hi-Z 10k-ohm primary impedance- Lo-Z 600-ohm secondary impedance balanced with center tap- Matches high-to-low impedance or low-to-high impedance- Adapts line level signals to microphone inputs- Phono jack or screw terminatls for Hi-Z side- Screw terminals for Lo-Z side- Steel enclosure w/mounting ears allows easy mounting