Cabletron Systems STHI - Manual (Page 21)

Operating Specifications
Page 2-3
• UTP cables that contain Token Ring signals should not be
simultaneously used for applications which may impress high
voltages (greater than 5 volts) with sharp rise or fall times, since the
noise coupling from such signals could directly cause errors on the
Token Ring network.
• Where practical, dedicated cable should be used for Token Ring
signals.
• Work area wall plates and outlets used for the Token Ring network
should be clearly labeled as Token Ring network lobe connections.
2.2 Operating Specifications
Cabletron Systems reserves the right to change these specifications
without notice.
2.2.1 Hubstack Interconnect Cables
Cabletron’s HubSTACK Interconnect cables (Part Number 9380141) must
be used when interconnecting STH devices with the STHI.
2.2.2 TCU and COM Ports
The STHI hub’s network ports are female RJ45 connectors. The pinouts
shown in Figure 2-1 are common to all STHI and STH TCU ports.
Figure 2-1. TCU pinouts
On STHI models -42/-44, each RJ45 connector is encased in a metallic
shield which provides a means of connection for the STP cable shield.
MALE
RJ45
8
7
6
5
4
3
2
1
Cable Shield*
Cable Shield*
*Cable Shield
not used
with UTP cabling
TX+
RX-
RX+
TX-