Toshiba DK Cards I***
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Toshiba DK IMDU Remote Maintenance Subassembly

The IMDU is an optional modem that connects to a PIOU or PIOUS to link the system to off-site programming and maintenance equipment, such as a DKAdminPC. The IMDU has an internal maintenance channel and does not require a dedicated CO line or station port. Data transmission speed can be set at 300 or 1200 bps full duplex.

Toshiba BVPU Voice over IP