ADC HiGain H2TU-C-319 List 3F Quick Installation page 5

L
OOPBACK
Initiate loopback testing from the maintenance menus or use the MODE and LBK
pushbuttons. The inband codes shown below can be sent by a test set.
Network
Downstream
Loopback Inband Code
NLOC 1111000
NREM 1110000
(a)
COLB
(a)
RULB
CREM 1111110
CLOC 1111100
SMJK 11000
Loopdown 11100
(a) Dual loopbacks are only initiated from the MODE and LBK pushbuttons.
Message
(b)
PWR FEED SHRT
(b)
PWR FEED GND
(b)
PWR FEED OPEN
LOSW
LLOS
RLOS
(c)
LAIS
(c)
RAIS
(c)
TRCI
(c)
RRAI
(c)
xxx-DBER
(c)
PRMF
(c)
PRMN
xxx-HBER
xxx-MAL
xxx-LA
(a) Front-panel alarm messages are listed in order of priority.
Pressing the LBK pushbutton initiates an Alarm Cutoff (ACO) message.
(b) Message displays repeatedly as long as the alarm condition exists, and is not included in the priority order.
(c) Does not activate the alarm relay access on pin H.
To comply with the intrabuilding wiring requirements of GR-1089
CORE, Section 4.5.9, the shields of the ABAM-type cables that
connect the line unit DSX-1 output ports to the cross-connect
panel must be grounded at both ends.
T
ESTING
H2TU-C
DSX-1
NLOC CREM
* When enabled, TLOS is an automatic loopback
that occurs with an LOS at the remote DS1 input.
Table 1. GNLB Loopback Commands
Description
DSX-1 signal is looped back to the network at the H2TU-C.
DSX-1 signal is looped back to the network at the H2TU-R.
DSX-1 signal is looped back to the network at the H2TU-C and signal from the
customer is looped back to the customer at the H2TU-C.
DSX-1 signal is looped back to the network at the H2TU-R and signal from the
customer is looped back to the customer at the H2TU-R.
DS1 signal from customer is looped back to the customer at the H2TU-C.
DS1 signal from customer is looped back to the customer at the H2TU-R.
DSX-1 signal is looped back to the network at the H2TU-R SmartJack module.
Deactivates any of the above loopbacks.
Table 2. Front-Panel Alarm Messages
Description
A short between the Tip and Ring of the HDSL2 pair.
The HDSL2 loop is grounded.
A line-power open condition.
The HDSL2 loop has lost synchronization.
No signal is detected at the DSX-1 input to the H2TU-C.
No signal is detected at the DS1 input to the H2TU-R.
Line Alarm Indication Signal.
Remote Alarm Indication Signal.
An RAI alarm (yellow) from the Customer Premises Equipment (CPE) with an
error-free signal from the line unit or network.
An RAI alarm (yellow) from the CPE with errors from the line unit or network.
A system DS1 Bit Error Rate (BER) alarm. (xxx denotes either Transmission Unit
Central Office [TUC] or Transmission Unit Remote End [TUR].)
H2TU-R Performance Report Messaging BER threshold exceeded at far end.
H2TU-R Performance Report Messaging BER threshold exceeded at near end.
A system HDSL2 Block Error Rate (BER) alarm. (xxx denotes either TUC or TUR.)
The margin on the HDSL2 loop has dropped below the threshold setting.
(xxx denotes either TUC or TUR.)
The attenuation on the HDSL2 loop has exceeded the maximum threshold value.
(xxx denotes either TUC or TUR.)
H2TU-R
DS1
NREM
CLOC
SMJK
TLOS*
Upstream
(a)
ALRM displays prior to any alarm message.
Customer
Premises