American Telecom AM64/128A - Manual (Page 18)

Menu Operation - Test Menu AM64/128A User Manual
18
5.4 Test Menu
1. Local loop
2. Loop back
3. Remote loop
4. Binary pattern
5. Data error test
6. In service error test
7. Lamp test
8. Self Test
9. Comms channel loop
5.4.1 Local loop
This is a loop applied within the local BBM. It loops data back to the DTE from a point as close to the
interface connector as possible. This loop can be applied in two ways
(1) From the Menu.
(2) Direct from the DTE - see section 5.4.1.2.
5.4.1.1 Local loop from menu
The top level display shows T > Loc Loop Off
Pressing SELECT sets the loop T > Loc Loop On
The top display in the status menu will display Loop Active and the TM LED should also light up.
The data flow with the loop applied is shown in fig 5.4.1.1.
Figure 5.4.1.1