TOSHIBA (PIOU1A) V.4 Option Serial Interface PIOU
The Toshiba PIOU1A Card is an option serial interface and external zone paging unit.
This Toshiba PIOU1A interfaces with SMDR, local terminal or external modem. It contains relay control, BGM mute control, tape recorder control or night ring relay, and 4-zone page interface.
Use one per Toshiba DK40i or DK424i phone system.
Accepts IMDU Internal modem
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