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PCI/ISA Multiport

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SystemBase Co., Ltd.

16F Daerung Post Tower-1, 212-8, Guro-dong, Guro Gu, Seoul
Contact name
Jerry Jin

Quick Information

  • Model Number : Multi-4



  • Multiport board for PCs
  • Fully compatible with PC serial COM ports
  • Four DB-9/DB-25 Female connectors
  • RI (No. 9) signal line can supply power. (In case of DB-9 panel only)
  • Full modem signals
  • Built-in surge protector, Tx/Rx LEDs
  • Interfacing mode (RS232/RS422/RS485) is selectable depending on panels.


No. of ports 4
Comm. speed Up to 921.6Kbps
Bus interface PCI (3.3V & 5V), PCI-X, ISA
Line interface RS232/RS422/RS485
Connector DB-9/DB-25 Female
IRQ Automatic setting
I/O address Automatic setting
Comm. controller SystemBase UART (16C554)
Protective device Surge protector
Operating system Windows 95/98/NT/2000/XP, SCO Unix, Linux, OS2(*), DOS(*) (* in case of ISA only)
Dimension 135 x 84 x 26mm(DB-9)
Weight(panel) 220g(DB-9)


  • Four serial ports can be installed with one PCI slot.
  • Additional power is not required for lower-power devices such as scanners (5V or 12V selectable).
  • Communication status can be monitored through LEDs.
  • Interfacing mode is selectable only by replacing a panel instead of the board or device drivers.
  • The built-in, high-performance surge protector enables high stability against electric shock.

Ordering Information

Model Description Package
Multi-4/PCI RS232 4-port RS232 PCI Card & Panel

Related CD is provided
(Including drivers and a user's manual).

44-pin cable is also provided (1M).

Multi-4/PCI RS422 4-port RS422 PCI Card & Panel
Multi-4/PCI RS485 4-port RS485 PCI Card & Panel
Multi-4/ISA RS232, RS422, RS485 4-port RS232, RS422, RS485 ISA Card & Panel

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