Key telephone line circuit tone-on-hold arrangement

Details Key telephone line circuit tone-on-hold arrangement Key telephone line circuit tone-on-hold arrangement

H - Electricity

04

M

379/33

H04M 1/72 (2006.01) H04M 3/428 (2006.01) H04M 9/00 (2006.01)

Patent

CA 1083734

KEY TELEPHONE LINE CIRCUIT TONE-ON-HOLD ARRANGEMENT Abstract of the Disclosure There is disclosed a circuit for generating tone signals from clocking signals present on each key telephone line circuit. The tone signals are transformer coupled onto the communication leads by an optional plug-in board arrangement. In present installations music-on-hold is provided by connecting an external music source to each line card. There is also disclosed an arrangement for utilizing the optional plug-in board to provide either tone-on-hold or music-on-hold by simply reversing a plug-in connector. - 1 -

283167

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