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Industrial 8 Port RS232 Serial Splitter Switch Box with Power Adapter for Sharing PCs and Capture Data COM Port Expander 1x8 - Newegg.com
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DTECH 8 Port Rs232 Serial Splitter Switch With Power Adapter for Sharing Pcs an for sale online | eBay
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Serial Port Splitter One distribute Four Rs232 Hub 1 divided into 4 Serial Port Switcher Expander RS232 Hub concentrator|Instrument Parts & Accessories| - AliExpress
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