Add to Cart Compare Quick view CTCUnion ET100A Ethernet bridge for V.35/X.21/RS530/RS449/RS232 2Mbps sync ports MSRP: $595.00 Now: $380.00 Was: Important note: ET100A supports RS530 interface directly (no cable needed). If you need to use V.35, X.21, RS-449 or RS-232 interfaces, you need an adapter cable. We offer one such cable free with each product. Please contact us for availability of these... ET100A MSRP: $595.00 Now: $380.00 Was: Add to Cart Compare Quick view