Advertisement
L
OOPBACK
Initiate loopback testing from the HiGain maintenance menus or use the MODE and SEL
pushbuttons. The inband codes shown below can be sent by a test set.
CREM
NLOC
NDU1
HLU
Network
Loopback
Inband Code
NLOC
1111000
NDU1
110000
NDU2
111000
NDU3
1010001
NDU4
1010010
NREM
1110000
SMJK
11000
CREM
1111110
CDU1
111100
CDU2
111110
CDU3
1011001
CDU4
1011010
CLOC
1111100
Loopdown
11100
Copies of this publication or the user manual (LTPH-UM-1193-01) can
be downloaded from the ADC website at www.adc.com. To order a
hard copy, please contact your sales representative.
Code
Description
VER xxxx
The release revision of the firmware (appears during the System Settings review mode).
LIST xxxx
The model number of the product (appears during the System Settings review mode).
FRM xxxx
Indicates the type of frame pattern being received from the DSX-1, where xxxx is SF,
ESF, UNFR, or NONE.
CODE xxxx
The line code setting, where xxxx is Alternate Mark Inversion (AMI) or Bipolar with
8-Zero Substitution (B8ZS).
PLEV xxxx
Indicates the HDSL line voltage in its LOW (-140 Vdc), HIGH (±112 Vdc), or DIS
(disabled) state.
T
ESTING
CDU1
CDU2
NDU2
HDU1
HDU2
GNLB Loopback Commands
Description
DSX-1 signal is looped back to DSX-1 at HLU.
Query to initiate loopback at doubler 1 to the network.
Query to initiate loopback at doubler 2 to the network.
Query to initiate loopback at doubler 3 to the network.
Query to initiate loopback at doubler 4 to the network.
DS1 signal is looped back to DS1 at HRU.
Signal from DS1 is looped back at the HRU by the HRU
SmartJack module.
Signal from customer is looped back to the customer at the HLU.
Query to initiate loopback at doubler 1 to the customer premises.
Query to initiate loopback at doubler 2 to the customer premises.
Query to initiate loopback at doubler 3 to the customer premises.
Query to initiate loopback at doubler 4 to the customer premises.
Signal from customer is looped back to the customer at the HRU.
Loops down any of the above loopback commands.
System Configuration Codes
CDU3
NDU3
NDU4
HDU3
HDU4
CDU4
NREM
CLOC
SMJK
TLOS
HRU
Customer
Premises
H0346-A
Advertisement
