ADTRAN T200 H2TU-R Installation And Maintenance Manual page 3

Label
1222026L7
STAT
STAT
DLOS
DLOS
RLOS
RLOS
HLOS
HLOS
DSL
DSL
HCRC
ARM/LBK
(YEL) (GRN)
B8ZS
AIS / LP
(OFF) (GRN)
O
P
T
CPE LOS
LBK
TX
M
O
N
RX
HCRC
ARM/LBK Off ........................ Unit is not in the armed or loopback state.
B8ZS
AIS/LP
61222026L7-5B
Table 2. Front Panel Indicators
Condition Description
Off ........................ Indicates no power present at H2TU-R.
Blinking Green ..... The unit is in the process of acquiring HDSL2 synchronization.
Solid Green .......... Normal Operation: HDSL2 synchronization is achieved.
Off ........................ DSX-1 signal is present at the H2TU-C.
Red ....................... Loss of DSX-1 signal into the H2TU-C.
Off ........................ DS1 signal is present at the H2TU-R.
Red ....................... Loss of DS1 signal into the H2TU-R from the CPE.
Off ........................ Normal operation: HDSL2 synchronization on the Loop.
Blinking Red ......... GFI or overcurrent condition detected.
Solid Red .............. Loss of HDSL2 synchronization on the Loop.
Off ........................ Unit is in the process of acquiring HDSL2 synchronization, or
HDSL2 synchronization has been lost as evidenced by the Red
HLOS indicator.
Green ................... Normal operation: Indicates good signal quality on the Loop. No
routine maintenance or verification is required.
Yellow ................... Marginal operation: Indicates marginal signal quality on the Loop.
Degraded conditions suggest verification of key HDSL2
parameters. For details, refer to the Troubleshooting Guide in
section 8 of this practice.
Red ....................... Alarm condition: Indicates poor signal quality on the Loop.
Requires prompt troubleshooting of HDSL2 circuit, including
verification of pulse attenuation, insertion loss, and other
parameters. For details, refer to the Troubleshooting Guide in
section 8 of this practice.
Blinking ................ Pulse attenuation (ATTEN on Span Status Screen) on Loop is
above the recommended threshold for quality service. If the pulse
attenuation is 30 dB or below, the DSL LED will remain solid. As
described above, the signal quality (margin) on the Loop is
indicated by the color of the DSL LED. For instance, if the signal
quality on the Loop is good and the pulse attenuation is bad, the
LED will Blink Green. If the signal quality is marginal and the
pulse attenuation is good, the LED will be Solid Yellow.
Off ........................ Normal operation: No HDSL2 CRC error detected within the last
24 hours on the Loop (no local loop trouble).
Blinking Yellow .... One or more HDSL2 CRC errors are being detected on the Loop
(local loop trouble).
Solid Yellow ......... Four or more HDSL2 CRC errors have occurred on the Loop
within the last 30 minutes. After a HDSL2 CRC error occurs, the
HCRC LED will remain Yellow for 30 minutes. If no HDSL2
CRC errors occur within a rolling 30 minute interval, the HCRC
LED will extinguish.
Yellow ................... Arming sequence has been detected. In this state, the unit is armed
(ready for loopback), but not in loopback.
Green ................... A loopback is active on this specific unit.
Off ........................ Indicates AMI line code.
Green ................... Indicates B8ZS line code.
Green ................... Indicates loopback will occur upon customer loss of signal.
Off ........................ Indicates AIS will be sent to the network upon customer loss of signal.
Section 61222026L7-5, Issue 2 3