Patton electronic 1060 AC Powered - Manual (Page 7)

5.2.2 REMOTE ANALOG LOOP
The second test mode is Remote Analog Loop. To enter this
mode, set one of the Model 1060s (local) in test mode by depressing
the "Loopback Test" switch. Any characters sent from the remote 1060
will be returned to it (see Figure 5). If no characters are echoed back,
check the wiring between the two Model 1060s. Be sure to wire the
units according to the instructions in Section 4.0 Installation.
Figure 5. Loopback Test Modes
11 12
RD
TD
TD
RD
Local 1060
In Normal Mode
Remote 1060
In Normal Mode
TX+
TX-
RX-
RX+
RX+
RX-
TX-
TX+
RD
TD
TD
RD
Local 1060
In Loopback Mode
Remote 1060
In Normal Mode
RX+
RX-
TX-
TX+
TX+
TX-
RX-
RX+
5.0 OPERATION
Once you have configured each Model 1060 properly and
connected it, simply plug in the AC power adapter to get it running;
there is no power switch on the Model 1060. You can monitor the
operation of the Model 1060 using the front panel LED indicators and
built-in loopback test modes.
5.1 LED INDICATORS
The Model 1060 incorporates six front panel LEDs that show the
status of the modem:
1. The power LED glows when AC power is applied to the modem.
2. The loopback test LED glows when the loopback test switch
has been depressed and is in a test mode.
3. The tri-state TD and RD indicators blink red and green with data
activity. Solid red indicates a low RS-232 logic level and no color
indicates no activity on the line. Note: RS-232 devices idle in a low
state, so the LED will glow red if the connections are correct and the
RS-232 device is in an idle state.
4. The control in and control out indicators glow red for a "low"
signal and green for a "high" signal. The specific pin number
associated with these indicators will vary according to the switch
settings you have selected (see Section 3.0 Configuration).
5.2 LOOPBACK TEST MODES
Select the test modes by depressing the "Loopback Test" switch.
When in loopback mode, the "Loopback Test" LED will glow red. Two
tests are possible using this switch: Local Analog Loop (LAL), and
Remote Analog Loop (RAL).
5.2.1 LOCAL ANALOG LOOP
The first test mode is Local Analog Loop (V.54 Loop 3). Any data
sent to the local Model 1060 in this mode will be echoed (returned)
back to the user device. For example, characters typed on the
keyboard of a terminal will appear on the terminal screen (see Figure 5
on the following page).