Specifications

Introduction
RADring
Installation & Operation Manual
1-2 General Description 8/11/98 12:03
RADring Hub
The RADring hub is a compact 3U high, 19" enclosure accepting up to 20
modules. These include:
•
Token Ring (TR) passive access modules
•
TR active access modules
•
TR Ring In/Ring Out modules
•
TR repeater modules
•
TR Elementary Bridge modules
•
Ethernet 10BaseT modules
•
Ethernet fiber-optic modules
•
Ethernet AUI modules
•
Ethernet extension modules
•
System modules
Table 1-1 lists the features of these modules.
The hub incorporates one or two power supplies and a common logic
module (CML) which can optionally include network management support
(CML/NM). In-band management support is provided by the Ethernet or
Token Ring In-band agent (CML/IB) module. Mixed installations of Token
Ring and Ethernet are supported.
Token Ring: The RADring can be installed as either a single centralized
access center, capable of supporting up to 80 Token Ring lobe connections
without Ring In/Ring Out (RI/RO) modules, or as part of a larger network,
through connection of additional hubs (or other IEEE 802.5 compatible
access units) via Ring In/Ring Out modules.
Multiple rings can co-exist as independent LANs within the same hub
irrespective of speed (4 or 16 Mbps) or media. Ring In/Ring Out modules,
access modules or local elementary bridge modules can all function to
isolate rings within the same hub, using split bus configuration.
Ethernet: Supports up to 80 10BaseT ports. Each Ethernet module can be
defined as a separate segment, or as a part of a global segment, through the
hub backplane.
RADring Modules
RADring accommodates a variety of different module types. The modules
are designed for operation over standard shielded twisted pair cables,
unshielded twisted pair cables, fiber optic, and coaxial cable, and are
compatible with IBM Token Ring equipment for 4 and 16 Mbps. Diagnostic
LEDs on each module indicate power, management and activity status. All
modules can be inserted and removed under hot plug in/plug out
conditions without network disruption. All Ring In/Ring Out modules and
repeaters incorporate automatic cable break protection and bypass
features.