• Professional Audio Equipment Distributors
  • Portland Maine (207) 773-2424

Line Powered Telephony Units

  • Sonifex CM-TBU Line Powered Telephone Balance Unit

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    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 high degree of separation between send and receive signals makes it suitable for use in telephone IFB (interrupted foldback) applications and the high drive capacity at the 4-wire [more]

  • Sonifex CM-TLL Line Powered Telephone Line Listen Unit

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    The CM-TLL provides a low-loss interface to receive audio from a telephone line. The line-powered unit is compatible with all analogue direct exchange lines and includes an LED indication of incoming calls. The unit is intended to be used with an earpiece amplifier to receive an audio feed by telephone from a studio. The line [more]