IBM 8239 TOKEN RING STACKABLE HUB

IBM 8239 TOKEN RING STACKABLE HUB : Summary

All hubs in the stack are manageable from a single point using out-of-band access, available on both models, or in-band access via the Model 1. A Model 1 is required for network management functions. Information is accessed either through the terminal interface or an SNMP-compatible application. The 8239 is supported by IBM's Nways® Workgroup Manager for Windows NT®; Nways Manager for AIX®; and Nways Manager for HP-UX. The 8239 offers many or more of the same network management features as multifunction switching hubs but at a much lower price per port. If all your desktop LAN's are Token Ring, the 8239's high performance and low cost-per-port make it an attractive choice.

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IBM 8239 TOKEN RING STACKABLE HUB

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IBM 8238 NWAYS TOKEN RING STACKABLE HUB

The IBM 8238 Token-Ring Stackable Hub addresses the emerging, higher functionality needs of both main office telecommunications closets and those of mission-critical remote sites.

The IBM 8238 delivers state-of-the-art fault tolerance at an affordable price. Our instant beaconing recovery distributes the beaconing recovery to each hub so that beaconing fault detection and recovery occur within moments.

When physical changes are required in the stack of an 8238 - either to add, remove, or change an expansion unit or base unit - the 8238's design permits hot swapping. These units can be added or removed without powering down the stack and without interfering with ring activity. Finally, the 8238's automatic speed detection feature makes sure that every station entering the ring is operating at the same speed as the ring. Any station that attempts to enter the ring while operating at the wrong speed is prevented from entering and disrupting the operation of the ring.