Home | Product Index | Order | Technical Support | Contact Us Coax to Fiber Optic Modems and Multiplexers for IBM SNA Networks Product Description 2870 1 Coax Port to Fiber 3700 4-32 Port Mux 3799 4 Port Mux Click for IBM Mark meaning and disclaimers. IBM and e-business Mark are TM's of IBM Corp. S.I. Tech is a registered trademark of S.I. Tech, Inc. ©2007 Copyright S.I. Tech, Inc. All copy and images.