Loopback Testing - ADC HiGain H2TU-C-388 List 2 Quick Installation

L
OOPBACK
Initiate loopback testing from the maintenance menus or use the MODE and SEL
pushbuttons. The in-band codes shown below can be sent by a test set.
Network
Loopback In-Band Code
NLOC 1111000
NREM 1110000
SMJK 11000
CREM 1111110
CLOC 1111100
Loopdown 11100
Copies of this publication or the technical practice (LTPH-TP-1115-xx) can be downloaded
from the ADC website at www.adc.com. To order a hard copy, please contact your sales
representative.
Message Description (listed in priority order)
(b)
PWR FEED SHRT A short between the Tip and Ring of the HDSL2 pair.
(b)
PWR FEED GND The HDSL2 loop is grounded.
(b)
PWR FEED OPEN A line-power open condition.
LOSW The HDSL2 loop has lost synchronization.
LLOS No signal is detected at the DSX-1 input to the H2TU-C.
RLOS No signal is detected at the DS1 input to the H2TU-R.
LAIS Line Alarm Indication Signal.
RAIS Remote Alarm Indication Signal.
LRAI An RAI condition is detected at the remote and the signal from the line unit is
error-free.
RRAI An RAI alarm (yellow) from the Customer Premises Equipment (CPE) with errors from
the line unit or network.
xxx-LOF DS1 input does not contain ESF or SF frame pattern setting of the FRMG option. (xxx
denotes either TUC or TUR.)
xxx-DBER A system DS1 Bit Error Rate (BER) alarm. (xxx denotes either TUC or TUR.)
PRMF H2TU-R Performance Report Messaging BER threshold exceeded at far end.
PRMN H2TU-R Performance Report Messaging BER threshold exceeded at near end.
xxx-HBER A system HDSL2 Block Error Rate (BER) alarm. (xxx denotes either TUC or TUR.)
xxx-MAL The margin on the HDSL2 loop has dropped below the threshold setting. (xxx denotes
either TUC or TUR.)
xxx-LA The attenuation on the HDSL2 loop has exceeded the maximum threshold value. (xxx
denotes either TUC or TUR.)
(a) Front-panel alarm messages are listed in order of priority.
Pressing the SEL 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.
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 H2TU-C-388 List 2 DSX-1 output ports to the
cross-connect panel must be grounded at both ends.
T
ESTING
H2TU-C
DSX-1
1111110
NLOC CREM
1111000
* When enabled, TLOS is an automatic loopback
that occurs with an LOS at the remote DS1 input.
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-R SmartJack
module.
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.
Deactivates any of the above loopbacks.
Front-Panel Alarm Messages
H2TU-R
DS1
TLOS*
NREM
CLOC
1111100
1110000
11000
SMJK
Customer
Premises
(a)
ALRM
displays prior to any alarm message.