H2Tu-C Front Panel Operation; Table 9. H2Tu-C Front Panel Led Indications - ADTRAN 1181113L2 Installation And Maintenance Practice

H2TU-C Front Panel Operation HDSL2 for General Distribution Installation and Maintenance Practice
H2TU-C FRONT PANEL OPERATION
LED indicators mounted on the front panel of the unit provide status of the HDSL2 circuit
Each indicator is described in Table 9 for the H2TU-C and Table 10 for the H2TU-R.
Table 9. H2TU-C Front Panel LED Indications
Description
■FV'rM.I
DSL
• Green
• Red
DSL sync, no errors currently detected, and signal margin >2 dB
No DSL sync, errors being detected, or signal quality < 2 dB
1 _
DSX/DS1
• Green DSX-1 signal is present and synchronized and no errors are
|dsl
• Red No DSX-1 signal, or signal is present with errors
gDSXIDSI
Salm
1
ALM
O Off
• Red
Yellow
No alarm condition detected
Loss of DSX-1 signal to the unit
Loss of DS1 signal to the remote
ESF/SF
O Off
• Green
• Yellow
Unit is provisioned for unframed data
Unit is provisioned for SF data
Unit is provisioned for ESF data
m
B8ZS/AMI
Yellow
Unit is provisioned for AMI line code
Unit is provisioned for B8ZS line code
LBK
O Off
• Yellow
Unit is not in loopback
Unit loopback is active toward network or customer
61223HDSL2L2-5B