Cabletron Systems SEH-24 User Manual

Also see for SEH-22: User guide

CONNECTING TO THE NETWORKPage 4-115. Check that the PWR LED on the EPIM-A is on. If the LED is noton, contact Cabletron Systems Technical Support.6. If the PWR LED is on with the AUI cable disconnected, continuewith the following checks:a. Check the AUI connections for proper pinouts. The pinouts forthe transceiver connection are listed in Chapter 2.b. Check the cable for continuity.c. Reconnect the AUI cable to the SEH and the device.If the LED is still not on after reconnecting the segment, contactCabletron Systems Technical Support.4.1.7 Connecting an AUI Cable to an EPIM-XCaution: The signal quality error (SQE) switch remains in the OFFposition for most network connections. However, some Data TerminalEquipment (DTE) requires SQE. Refer to your DTE manual for SQErequirement information.To connect an EPIM-X to a device not requiring SQE:1. Check that the SQE LED on the EPIM-X is off. If the SQE LED ison, check the position of the SQE switch.Note: If the SQE light remains on, even though the SQE switch isin the OFF position, contact Cabletron Technical Support.2. Attach one end of an AUI cable, no longer than 50 meters in length,to the port located on the EPIM-X (Figure 4-7) and the other end tothe intended node.