Sonifex CM-TBU

Line Powered Telephone Balance Unit

The CM-TBU line-powered telephone balance unit is compatible with all analogue direct exchange lines and provides a 4-wire communications system to interface with the telephone network.

The unit is supplied with a connector and cable kit that enables connections to be made to both UK Telecom or the universal RJ11 sockets used in most telephone networks around the world.

Features of the CM-TBU:

• Isolated, full-duplex 4-wire interface to direct non-digital telephone exchange lines.
• Line powered, requiring no battery or external power. 
• Simple optimization of sidetone rejection with any country's telephone system.
• LED's indicating ''Ring'', ''Line Hold'' and ''Limit'' 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 RJ11 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 extruded aluminium case with XLR3 male & female 4-wire connectors.