H2Tu-C Front Panel Operation; Table 9. H2Tu-C Front Panel Led Indications; Table 10. H2Tu-R Front Panel Led Indications - ADTRAN HDSL2 Installation And Maintenance Practice

H2TU-C Front Panel Operation

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
Front Label
Panel
DSL
DSX/DS1
1181113L2
DSL
DSX/DS1
ALM
ALM
ESF/ SF
(YEL) (GRN)
B8ZS/AMI
(YEL) (GRN)
ESF/SF
LBK
B8ZS/AMI
TX
E
Q
RX
LBK
Front Label
Panel
DSL
H T UR
1223024L2
DS1
LOCAL
ALM
DSL
DS1
ALM
ESF/SF
ESF/ SF
(YEL) (GRN)
B8ZS/ AMI
(YEL) (GRN)
LLB/ RLB
(YEL) (GRN)
B8ZS/AMI
LLB/RLB
LOC
L
B
K
16
Table 9 for the H2TU-C and

Table 9. H2TU-C Front Panel LED Indications

Status Description
DSL sync, no errors currently detected, and signal margin ≥ 2 dB
Green
Red No DSL sync, errors being detected, or signal quality < 2 dB
Green DSX-1 signal is present and synchronized and no errors are
detected
Red No DSX-1 signal, or signal is present with errors
Off No alarm condition detected
Red Loss of DSX-1 signal to the unit
Yellow Loss of DS1 signal to the remote
Off Unit is provisioned for unframed data
Green Unit is provisioned for SF data
Yellow Unit is provisioned for ESF data
Green Unit is provisioned for AMI line code
Yellow Unit is provisioned for B8ZS line code
Off Unit is not in loopback
Yellow Unit loopback is active toward network or customer

Table 10. H2TU-R Front Panel LED Indications

Status
Green DSL sync, no errors currently detected, and signal margin > 2 dB
No DSL sync, errors being detected, or signal margin ≤ 2 dB
Red
Green DS1 signal is present and no errors currently being detected
Red No DS1 signal or framing mismatch
Off No active alarm present
Red Loss of DS1 signal to the unit
Yellow Loss of DSX signal to the H2TU-C
Off Unit is provisioned for UNFRAMED data
Green Unit is provisioned for SF data
Yellow Unit is provisioned for ESF data
Green Unit is provisioned for AMI line code
Yellow Unit is provisioned for B8ZS line code
Off Unit is NOT in loopback
Green Active remote loopback from the H2TU-C toward the customer
Yellow This unit is in loopback (network and/or customer)
HDSL2 for General Distribution Installation and Maintenance Practice
Table 10
Description
for the H2TU-R.
61223HDSL2L2-5B