Cabletron Systems STHI Operating Specifications, Hubstack Interconnect Cables, TCU and COM Ports

Operating Specifications

•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.

2.2.1Hubstack Interconnect Cables

Cabletron’s HubSTACK Interconnect cables (Part Number 9380141) must be used when interconnecting STH devices with the STHI.

2.2.2TCU 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.

Cable Shield*

TX+

	8
RX-	7
	6
	5	MALE
	4	RJ45
RX+	3
	2
	1

*Cable Shield not used

with UTP cabling

TX-

Cable Shield*

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.

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