ADTRAN 203019L1 - Manual (Page 18)

2 NT1 ACE User Manual 61203019L1-1
NT1 ACE User Manual
The U-interface complies with ANSI T1.601 and
ITU-TI.430 Recommendation Standard. The S/T-interface
complies with ANSI T1.605 and ETSI ETS 300012 Stan-
dard.
The ADTRAN NT1 ACE is a stand-alone unit. An external
power source must be provided for the NT1 ACE. External
power is supplied by the ADTRAN Power Supply, part
number 336048VUR-2. The two S/T bus connectors on the
rear of the unit enable the NT1 ACE to supply power to the
TE.
LED Indicators
Table 1 describes the status of the LEDs located on the front
panel of the NT1 ACE.
Table 1. Status Indicators
If the ERROR indicator is illuminated, check the flash rate of
the READY indicator to determine the source of the error. A
faster 8 Hz flash rate indicates a network problem. A slower
1 Hz rate indicates an S/T interface problem.
LED Color Description
READY Green S/T- and U-interfaces ready to place call
ERROR Red S/T- or U-interface not ready
POWER Green Unit has power