Toshiba Serial Interface Unit.

(Model # RSIU)
Toshiba Serial Interface Unit.

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1 per system to provide from 1 to 4 RS-232 serial ports for SMDI, MIS, SMDR call accounting PC, 280Admin/280Backup PC or maintenance terminal, external modem, or CTI PC. RSIU comes standard with 1 RS-232 port. Accepts up to 3 RSIS subassemblies, or 2 RSIS and 1 RMDS modem subassembly.
SKU Condition
RSIU Unused
RSIU-R Refurbished