IC207A/8A-Manual 7/12/00 9:31 AM Page 8
ACTIVE STAR HUB
2. Introduction
2.1 Description
The IBM® 5250 Express protocol, capable of TCP/IP support, is quickly becoming the “de facto” standard for AS/400® 5250 PC emulation. With the Active Star Hub from Black Box, you’re guaranteed an upgrade path (via firmware) to the new protocol for far less cost than completely replacing the hub.
The Hub is a state-of-the-art dual active star that has two host-port connections and 14 device-port connections. It was designed with protocol-transparent criteria and is available with either RJ-11 or RJ-45 connectors. This standards-based, flexible UTP star solution is a low-cost alternative to expensive and rigid twinaxial daisychain cabling. Each device port is isolated, assuring that problems won’t be transmitted throughout the entire network. Digital Phase Lock Loop and signal conditioning, noise suppression, and proven interoperability assure reliable and transparent connections with all models of IBM AS/400, 3X, and compatible terminals, printers, emulation cards, and remote controllers.
2.2 Features
•Proven interoperability with 5250 compatibles.
•Standards-based 5250 “star” hub distribution allows greater flexibility for adds, moves, and changes.
•Meets or exceeds EIA/TIA wiring recommendations.
•Advanced noise filtering and signal conditioning allows the use of lesser-grade cabling systems.
•Polarity insensitive as long as host and device polarities are the same.
•Guaranteed firmware upgrade path to the IBM 5250 Express protocol for up to 800% throughput enhancement.
