Specifications

Functional Description
RADring
Installation & Operation Manual
2-14 Module Functional Description 3/11/98 12:33
2.6 Module Functional Description
General
All RADring modules support both 4 and 16 Mbps Token Ring over the
following media:
UTP (100
Ω
)
Regular Unshielded Twisted Pair such as IBM Type 3 and
AT&T SYSTIMAX PDS 1010. Use of UTP requires media
filter at active stations (if it is not supported by the
station's adapter card). UTP connection is via RJ-45
connectors.
Enhanced UTP
(100
Ω
)
Enhanced performance Unshielded Twisted Pair such as
AT&T SYSTIMAX PDS 1061 or 2061. UTP connection is
via RJ-45 connectors. Use of enhanced UTP also requires
media filters at active stations.
Screened UTP
(100
Ω
)
Screened UTP ensures immunity of the signal from
external interference. It also ensures RFI compliance.
Screened UTP is commonly defined for 100W and uses
a shielded RJ-45 plug and socket to ensure continuity of
the shield. 150 versions of the modules can be provided
upon special request.
Coaxial Cable
(93
Ω
)
Coaxial cable can be used only on the lobes. RG-62
option is available. The use of coax also requires a (TXC)
balun to be used at the station interface. Both transmit
and receive signals are carried on a single coaxial cable.
Connection is via a single BNC connector.
STP (150
Ω
)
Shielded Twisted Pair as defined by IBM Types 1, 2, 6 or
9. Connection is via a 9-pin D-type connector, enabling
connection to the patch panel via the standard station
cable.
Fiber-optic
Fiber-optic cables can be either 50/125 micron,
62.5/125 micron or 100/140 micron multimode fiber.
Special options are also available for single mode fiber
modules. Connection is via SMA or ST connectors.
Impedance matching of each module to the 150 ohm backplane enables
mixing of different media in the same hub and on the same ring. This
prevents problems of signal reflections, distortion and power loss due to
mismatching.
Active UTP modules all incorporate integrated media filters for compliance
with RFI regulations.