CHAPTER 2:
INSTALLATION
Page 2-2
ST-500 INSTALLATION GUIDE
2.3
Installation Site
To install the ST-500 transceiver, a minimum area of 17.8-cm (7-in) high
by 20.3-cm (8-in) wide by 10.2-cm (4-in) deep is recommended to pro-
vide enough space for the transceiver, tap, and Attachment Unit Inter-
face (AUI) cable connections.
Ensure that the installation site meets the environmental conditions
specified in Appendix A.
2.4
Setting the SQE (Heartbeat Test ) Switch
If the tap is already installed on the transceiver, remove the two flat-head
screws securing the tap to the transceiver case. Then remove the tap to
gain access to the SQE switch. Refer to Figure 2-1 for the location of the
SQE switch and how to set it to enable (ON) or disable (OFF) the heart-
beat test feature.
Note:
The ST-500 transceiver is shipped with the SQE switch ON.
Ensure that the SQE switch is OFF whenever connecting the transceiver
to a repeater AUI. Otherwise, network problems (excess collisions) will
result.
Figure 2-1. SQE Switch
SQE
SWITCH
ON
OFF
