Cabletron Systems STHI User Manual
STHI Overview
Page 1-4
Active Circuitry
3
On each TCU port, STHI hubs provide active circuitry which filters,
equalizes, and amplifies all received signals before transmitting them to
the next point on the ring. The result is enhanced signal integrity and
extended maximum station lobe cable distances.
equalizes, and amplifies all received signals before transmitting them to
the next point on the ring. The result is enhanced signal integrity and
extended maximum station lobe cable distances.
Daughter Board Upgrade Kit
4
The following daughter board upgrade kits may be used to expand STHI
hubs from 12 to 24 TCU ports:
hubs from 12 to 24 TCU ports:
•
TR-UTP-UGKT for STHI-22.
•
TR-STP-UGKT for STHI-42.
1.2.3
RI & RO Ports
The STHI incorporates a pair of RI/RO port sockets for Token Ring Port
Interface Modules (TPIMs). This Ring In / Ring Out port pair allows for
the expansion of the main ring to other hubs. Refer to Section 5.6.3,
Interface Modules (TPIMs). This Ring In / Ring Out port pair allows for
the expansion of the main ring to other hubs. Refer to Section 5.6.3,
, for the
procedure to enable RI/RO ports.
Essentially, TPIMs are media adapters which enable their host modules to
expand their network connections to other media types. The TPIM models
listed in Table 1-2 are produced by Cabletron Systems and may be
installed in the RI/RO port sockets on the STHI. Refer to Section 3.1,
expand their network connections to other media types. The TPIM models
listed in Table 1-2 are produced by Cabletron Systems and may be
installed in the RI/RO port sockets on the STHI. Refer to Section 3.1,
Table 1-2. TPIMs, Supported Media, and Connectors
TPIM Media
Type
Connector
TPIM-T1
Shielded Twisted Pair
DB9
TPIM-T2
Unshielded Twisted Pair
RJ45
TPIM-T4
Shielded Twisted Pair
RJ45
TPIM-F2
Multimode Fiber
ST
TPIM-F3
Single Mode Fiber
ST