Paradyne 7511 User Manual

3-17511-A2-GB20-00 June 1997Monitoring the DSUs3Selecting a DSUThe 7511 comprises two DSUs, designated DSU A and DSU B. The DSU A andDSU B LEDs designate which DSU is selected. To select the other DSU formonitoring or testing, press the A/B switch on the faceplate.Front Panel LEDsThe network activity and the status of the DSUs are reflected in the faceplate’slight-emitting diodes (LEDs).InitializationWhen the card first receives power, a self-test begins and the LEDs exhibit thefollowing behavior:1. All LEDs except A Alarm and B Alarm are initialized to off.2. All LEDS turn on momentarily.3. All LEDs turn off momentarily.4. The Alarm and OK LEDs are turned off or on depending on the test results.LED GroupsThe LEDs can be divided into five logical groups: Status Network DSU selection Test Port