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Table 4. Front-Panel System Information Messages (Scroll Mode)
Code
Description
CODE xxxx
Line code (AMI, B8ZS).
FRM xxxx
Frame pattern received from the
DSX-1 (SF, ESF, or UNFR).
LATT xx
Loop attenuation (0 to 40 dB). Default
is 35.
(a) To scroll through system information messages, press the MODE pushbutton for 3 or more seconds.
L
OOPBACK
Initiate loopback testing from the maintenance menus, the front-panel MODE and SEL
pushbuttons, or a test set. Inband codes used by a test set are shown in the table below.
Network
Toward Customer
Loopback
Inband Code
NLOC
1111000
NREM
1110000
(a)
COLB
(a)
RULB
CREM
1111110
CLOC
1111100
SMJK
11000
Loopdown
11100
(a) Dual loopbacks can be initiated only from the front-panel MODE and SEL pushbuttons.
Copies of this publication or the user manual (LTPH-UM-1181-01)
can be downloaded from the ADC website at www.adc.com. To
order a hard copy, please contact your sales representative.
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
HDSL2
DSX-1
NLOC
CREM
* When enabled, TLOS is an automatic loopback
that occurs with an LOS at the remote DS1 input.
Table 5. 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.
Code
Description
LIST xx
Product list number.
MARG xx
Margin threshold (0 to 15 dB). Default
is 4.
VER x.xx
Firmware version.
H2TU-R
DS1
NREM
CLOC
SMJK
TLOS*
Toward Network
(a)
Customer
Premises
H0025-B
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