Sonifex CM-TBU Line Powered Telephone Balance Unit

From Sonifex, the CM-TBU Line Powered Telephone Balance Unit is compatible with all analog direct exchange lines and provides a four-wire communications system to interface with the telephone network. The high degree of separation between send and receive signals makes this balance unit suitable for use in telephone IFB (interrupted foldback) applications. The high drive capacity at the four-wire output enables a presenter's earpiece to be connected directly to the unit without an external amplifier. This compact balance unit is powered from the telephone line and provides an interface to a four-wire circuit with separate level control of send and receive signals.