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COM Port Requirements
SEHI User’s Guide 3-5
3.3 COM PORT REQUIREMENTS
The RJ45 COM port supports access to a Local Management Console.
The Console port supports a Digital Equipment Corporation, VT320
terminal or PC emulation of the VT320 terminal. Figure 3-2 shows the
pinouts for the RJ45 COM port.
Figure 3-2 COM Port Pinouts
3.4 TRANSCEIVER REQUIREMENTS
When connecting an external network segment through a transceiver to
the SEHI with an EPIM-A, the following requirements must be met:
• The transceiver or Ethernet device to which the module is 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 when it is connected 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 the SQE test interpret the
SQE test pulse as a collision.
1. Transmit Data
2. Data Carrier Detect
3. Data Set Ready
4. Receive Data
5. Signal Ground
6. Data Terminal Ready
7. Request To Send
8. Clear To Send
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COM
165201
SEHI Book Page 5 Friday, April 19, 1996 10:46 AM