Loopback Testing; Front-Panel Alarm Messages - ADC HiGain H2TU-C-319 List 4E Quick Installation

P
ROVISIONING (C
5 Once the H2TU-C is successfully installed and provisioned, access the Monitor or
Performance menus to clear the Performance and Alarm History screens to ensure
useful data.
L
OOPBACK
Initiate loopback testing from the HiGain maintenance terminal screen or use the MODE
and LBK pushbuttons. The inband codes below (except COLB and RULB) can also be sent
by a test set.
Loopback Inband Code
1111000
NLOC
NREM 1110000
SMJK 11000
CREM 1111110
CLOC 1111100
Loopdown 11100
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Message
(b)
PWR FEED SHRT
(b)
PWR FEED GND
(b)
PWR FEED OPEN
LOSW
MTA
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. 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 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 H2TU-C-319 List 4E DSX-1 output ports to the
cross-connect panel must be grounded at both ends.
ONTINUED
T
ESTING
H2TU-C
DSX-1
1111110
NLOC CREM
1111000
Network
* 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

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. The span closest to the network has highest
priority.
Indicates that the H2TU-C is in a metallic test access state.
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 LED) from the Customer Premises Equipment (CPE) with an
error-free signal from the line unit or network.
An RAI alarm (yellow LED) from the CPE with errors from the line unit or network.
A system DS1 Bit Error Rate (BER) alarm. (xxx denotes either TUC or 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
TLOS*
NREM
CLOC
1111100
1110000
11000
SMJK
Customer
Premises
(a)