Deployment Guidelines; Front Panel Leds; Table 5. Front Panel Leds - ADTRAN Total Access 3000 Installation And Maintenance Practice

Deployment Guidelines

The number of powering pairs required for powering a DSLAM is dependent on the total resis-
tance in the loop serving the powering pairs. For more information, refer to "Line Powering" in
the specific DSLAM Installation and Maintenance Practice.

Front Panel LEDs

The 4-Pair Line Power Unit Access Module provides front panel LEDs to display status infor-
mation. The 4-Pair Line Power Unit LEDs and status descriptions are shown in
Label Status
POWER
UNDER VOLTAGE
GROUND FAULT
OVERLOAD
UNDER CURRENT
61181500L2-5B

Table 5. Front Panel LEDs

Description
Off LPU has completely failed or the shelf has no power
Green LPU is In Service and supplying power
Yellow LPU is Out of Service-Maintenance or
Out of Service-Unassigned
Red LPU has failed self-test
Flashing LPU is being accessed (terminal, four-character display,
(all colors) TFTP, etc.)
Off Voltage normal: ±145 volts per T/R (±5%)
Red Less than 115 VDC per T or R
Less than 230 VDC per T/R pair
Off No ground fault
Red Ground fault detected
Off No overload
Red Greater than 0.4 amps at 290 VDC
Off Current normal
Red Less than 0.004 amps
Installation
Table 5.
9