Table of Contents
Advertisement
CHAPTER 3: FRONT PANEL FEATURE ACCESS
EIA Data Communication Port Status Display
The EIA Data Communication Port Status display shows the state of critical EIA-232D leads listed
below:
Data Terminal Ready (DTR)
Data Set Ready (DSR)
Data Carrier Detect (DCD)
Request to Send (RTS)
Clear to Send (CTS)
Transmit Data (TD)
Receive Data (RD).
Press [
] from the (Home) display to display EIA Port Status. The EIA port status is the second
NEXT/NO
item in the main menu.
The display on the 7500 will look something like the EIA Status display that is depicted in Figure 7.
The abbreviated names of the leads appear above the display.
Typical EIA Status Display (Dual Port Async DCE Configuration)
Figure 7:
The first display position, the Port ID position, indicates Port 1 status on the top half of the display
and Port 2 status on the bottom half. Port 1 is the main port; Port 2 is the port on the optional Second
Asynchronous Interface board. If you have only one port, the lower half of the display is left blank.
The DTR through CTS positions display the status of the EIA control leads DTR (Pin 20), DSR (Pin
6), DCD (Pin 8), RTS (Pin 4), and CTS (Pin 5). The display shows a triangle symbol when the lead is
On, and a dot (.) when the lead is Off or not connected.
The TD and RD positions display the status of the EIA data leads TD (Transmit Data, Pin 2), and
RD (Receive Data, Pin 3). The display shows a triangle symbol when asynchronous data is being
transmitted or received. When asynchronous data is not being transmitted or received, the display
shows a dot.
14
Advertisement
Table of Contents
