TELEPHONES TX55, TX56, TX57 & TX58
|The four low profile terminals titled TX55 to TX58 are intended for use on "THE
PENTARA 100 Phone System".
The terminals are approved for connection to existing Herald Phone Systems and were not offered until stocks of TX51 and TX52 terminals were exhausted.
The terminals use electronic speech circuits in conjunction with specialised handset transducers and therefore it was not possible to fit or use any of the facility handsets available.
These terminals have continuously variable volume controls for the tone sounder and an internal link for altering the pitch of the tone sounder, but none of the new terminals have Power Failure working capability.
TX55 - Standard Terminal (Basic 4-wire terminal)
Seven programmable facility buttons with associated LED's are available and the instrument incorporates a monitor loudspeaker. In addition to the 12 button keypad there are dedicated buttons for Recall, Transmit, Program, Hold and Monitor.
Unlike previous Herald terminals, the monitor amplifier will be cancelled after making a
hands free call when the handset is lifted.
TX56 - Standard Loudspeaking Terminal
Last revised: November 01, 2010