Specifications

RADring
Installation & Operation Manual Functional Description
3/11/98 12:33 RI/RO Modules Functional Description 2-31
The (nominal) output level is 4 V ptp (on 150 ohms), while the minimum
input level is 200 mV ptp. The input impedance used by the TCR is
150 15 ohms for STP and 100 10 ohms for UTP. Design rules with TCR are
provided in Chapter 6.
U
T
P
S
T
P
TCR
U
T
P
S
T
P
TCR
U
T
P
S
T
P
TCR
TCR(RI)
TCR(RI)
TCR(RO)
TCR
S-TAU
Figure 2-22 TCR Application
TFR Fiber-optic
Repeater Module
The TFR Fiber-optic repeater module extends the distance between
adjacent RADring hubs up to 3km (1.9 miles) over multimode fibers.
Module configuration is switch-selectable for either Ring In or Ring Out
operation and is displayed by means of RI/RO front panel indicators. The
TFR functions also as the terminating card of the lobe access module cards,
enabling coexistence of independent networks on the same hub.
The TFR can operate in conjunction with the TFR-16, either as a stand-alone
unit or installed in the RI/RO port of a TAU, to enable fiber-optic connection
to an adjacent TAU. The TFR also enables remote connection of the
RADring hub to a fiber-optic lobe interface of a central concentrator, such as
a Fiber Optic TAU or RADring equipped with a TL-2/F module, for satellite
configuration.