Cabletron Systems SEHI-24, SEHI-22, SEHI-32, SEHI-34 manual Com, Transceiver Requirements

Models: SEHI-24 SEHI-32 SEHI-34 SEHI-22

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INSTALLATION REQUIREMENTS/SPECIFICATIONS

2.4COM PORT REQUIREMENTS

The RJ45 COM port supports access to a Local Management Console. The Console port supports a Digital Equipment Corporation, VT 320™ terminal or PC emulation of the VT 320™ terminal. Figure 2-8 shows the pinouts for the RJ45 COM port.

1 2 3 4 5 6 7 8

COM

1. Transmit Data

5.

Signal Ground

2.

Data Set Ready

6.

Data Terminal Ready

3.

Not Used

7.

Not Used

4.

Not Used

8.

Not Used

Figure 2-8. COM Port Pinouts

2.5TRANSCEIVER REQUIREMENTS

When you connect an external network segment, via a transceiver, to the SEHI with an EPIM-A, the following requirements must be met:

The transceiver or Ethernet Device to which the module will be connected must meet IEEE 802.3 standards, and/or Ethernet Version 1.0 or Version 2.0 standards.

The Signal Quality Error (SQE) test function on the transceiver must be disabled if you connect it to a repeater or to an Ethernet Version 1.0 device. In addition, some Version 2.0 equipment does not support the SQE test. Devices that do not support SQE test interpret the SQE test pulse as a collision.

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Cabletron Systems SEHI-24, SEHI-22, SEHI-32, SEHI-34 manual Com, Transceiver Requirements