Loopback Testing - ADC HiGain H2TU-C-231 List 1E Quick Installation

L
OOPBACK
Initiate loopback testing from the monitor screen or use the MODE and SEL buttons. The
inband codes below can also be sent by a test set.
Loopback Inband Code
NLOC 1111-1111-0001-1110 (FF1E) DSX-1 signal is looped back to the network at the H2TU-C.
NREM 1111-1111-0000-0010 (FF02) DSX-1 signal is looped back to the network at the H2TU-R.
SMJK 1111-1111-0100-1000 (FF48);
100000; 11000
CREM 0011-1111-0001-1110 (3F1E) Signal from customer is looped back to the customer at H2TU-C.
CLOC 0011-1111-0000-0010 (3F02) Signal from customer is looped back to the customer at H2TU-R.
Loopdown 1111-1111-0010-0100 (FF24);
11100; 100
For more information about the HiGain HDSL2 maintenance screens, refer to the
H2TU-C-231 List 1E technical practice, document number 152-231-115-xx. Copies of this
publication or the technical practice can be downloaded from the ADC website at
www.adc.com. To order a hard copy, please contact your sales representative.
Message Description
(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 FEEDOPEN A line-power open condition.
LOSW The HDSL2 loop has lost sync.
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.
(c)
LAIS Local Alarm Indication Signal.
(c)
RAIS Remote Alarm Indication Signal.
(c)
TRCI An RAI alarm (yellow) from the CPE with an error-free signal from the line unit or network.
(c)
RRAI An RAI alarm (yellow) from the Customer Premises Equipment (CPE) with errors from
the line unit or network.
(c)
xxxx-DBER A system DS1 Bit Error Rate (BER) alarm. (xxxx denotes either TUC or TUR.)
(c)
PRMF H2TU-R Performance Report Messaging BER threshold exceeded at far end.
(c)
PRMN H2TU-R Performance Report Messaging BER threshold exceeded at near end.
xxxx-HBER A system HDSL2 Block Error Rate (BER) alarm. (xxxx denotes either TUC or TUR.)
xxxx-MAL The margin on the HDSL2 loop has dropped below the threshold setting. (xxxx denotes
either TUC or TUR.)
xxxx-LA The attenuation on the HDSL2 loop has exceeded the maximum threshold value. (xxxx
denotes either TUC or TUR.)
(a) Front-panel alarm messages are listed in order of priority. ALRM displays prior to any alarm message.
Pressing the SEL button 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 pins 20 and 21.
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-231 List 1E DSX-1 output ports to the
cross-connect panel must be grounded at both ends.
T
ESTING
H2TU-C
1111110
NLOC CREM
1111000
Network
* When enabled, TLOS is an automatic loopback
that occurs with an LOS at the remote DS1 input.
Table 1. A4LB Loopback Commands
Description
DSX-1 signal is looped back to the network at the H2TU-R
SmartJack module. (Choose any one of the three commands.)
Deactivates any of the above loopbacks. (Choose any one of the
three commands.)
Table 2. Front-Panel Alarm Messages
H2TU-R
TLOS*
NREM
CLOC
1111100
1110000
11000
SMJK
Customer
Premises
(a)