NT1ACE4User Manual
2NT1ACE
4UserManual 61200242L1-1
TheU interface complies with ANSI T1.601 and ITU-
T1.430Recommendation Standard. The S/T interface com-
plieswith ANSI T1.605 and ETSI ETS 300012 Standard.
The ADTRAN NT1 ACE4is a stand-alone unit and is pow-
eredby an external power supply (the ADTRAN power
supply,part number 336012VUR01).
LED Indicators
Table1-1 describes th e status of the LEDs located on the
frontpanel of the NT1 ACE4.ThereisaREADYand
ERRORin dicator for eachport of the NT1 ACE 4.
Table 1-1. Status Indicators
Ifan ERROR in dicator is illuminated, check the flash rate of
theREADY indicat orto determine the source of the error. A
faster8 H z flash rate (8 flashes per second) indicates a net-
workproblem. A slower 1 Hz flash rate (1 flash per second)
indicates an S/T interface problem.
LED Color Description
READY Green S/TandU interfaces are
ready to place call.
ERROR Red S/Tor U interface not
ready.