Loopback Testing - ADC HiGain H2TU-C-319 List 1 Quick Installation

L
OOPBACK
Initiate loopback testing from the HiGain maintenance terminal screen or use the MODE
and SEL buttons. The inband codes below can also be sent by a test set.
H2TU-C
1111110
NLOC
1111000
Network
Loopback Inband Code
NLOC 1111000
NREM 1110000
SMJK 11000
CREM 1111110
CLOC 1111100
Loopdown 11100
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Message Description
System Alarm Messages
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.
(b)
LAIS Local AIS Signal.
(b)
RAIS Remote AIS Signal.
(b)
LRAI An RAI condition is detected at the remote and the signal from the line unit is error-free.
(b)
RRAI An RAI (yellow) alarm from the Customer Premises Equipment (CPE) with a failure
from the network.
(b)
DBER A system DS1 Bit Error Rate (BER) alarm.
(b)
PRMF H2TU-R Performance Report Messaging BER threshold exceeded at far end.
(b)
PRMN H2TU-R Performance Report Messaging BER threshold exceeded at near end.
HBER A system HDSL2 Block Error Rate (BER) alarm.
MAL The margin on the HDSL2 loop has dropped below the threshold setting.
LA The attenuation on the HDSL2 loop has exceeded the maximum threshold value.
Line-power Alarm Messages
PWR FEED SHRT A short between the Tip and Ring of the HDSL2 pair.
PWR FEED GND The HDSL2 loop is grounded.
PWR FEED OPEN A line-power open condition.
(a) System 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) Does not activate the alarm relay access pin H.
(c) Line-power alarm messages display repeatedly as long as the alarm condition exists and are not included
in the priority order of the system alarm messages.
T
ESTING
CREM
110000
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.
Signal from customer is looped back to the customer at the H2TU-C.
Signal from customer is looped back to the customer at the H2TU-R.
Deactivates any of the above loopbacks.
Front-panel Alarm Messages
(a)
(c)
H2TU-R
TLOS
NREM
CLOC
1111100
1110000
11000
SMJK
Customer
Premises