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SerialComm SER-FIBER-SM-ST Fiber Modem RS-232/485/422

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SERIAL COMM - ETH-FIBER-MM St SERIAL Fiber Modem Unit Only

Esteem 192C Wireless Modem RS 232/422/485

B&B ELECTRONICS RS-232 MODEL 9PFLST PORT POWERED FIBER OPTIC MODEM with Cables

Cardinal 2400 DATA/FAX Modem – Vintage External Unit (Made in USA)