Prospect Electronics - Telephone Balance Unit type TC22

The TC22 line-powered telephone balance unit provides a high degree of separation between send and receive signals, enabling 4-wire communications systems to interface with the telephone network. In telephone IFB applications, the high drive capacity at the 4-wire output enables a presenter's earpiece to be connected directly to the unit without an external amplifier.

• Isolated, full-duplex 4-wire interface to non-digital telephone direct exchange lines.

• The unit is line powered, requiring no battery or external power.

• Simple optimization of sidetone rejection with any country’s telephone system.

• LED's indicate "ring" and "off hook" conditions.

• Input level control with line-sensing limiter and limit indicator.

• High drive output with level control for direct feed to presenter’s earpiece, etc.

• Loop-through British & American line sockets provide universal connection to line and telephone set.

• Connection to the telephone set is maintained while the unit is in use.

• Small, rugged metal case with XLR3 male & female 4-wire connectors.