A1Lb, A2Lb, And A5Lb Test Procedures; Loopback Modes - ADC HiGain H2TU-C-231 List 3F User Manual

Testing
H2TU-C HLU HLU HLU
H2TU-C HLU HLU HLU
H2TU-C
HLU HLU HLU
FF1E
NLOC D3D3 ‡
1111000
4-in-7
HLU HLU HLU
H2TU-C
3F1E
CREM
D3D3 ‡
1111110
6-in-7
All ones HLU HLU HLU
H2TU-C
HLU HLU HLU HLU HLU HLU HLU HLU HLU HLU HLU HLU HLU HLU HLU
All ones
H2TU-C
H2TU-C
HLU HLU HLU
COLB
* Set the NLBP option to AIS to send AIS (indicated by an all ones pattern) for any network loopback.
=
A3LB and A4LB loopback codes.
‡ A1LB, A2LB, and A5LB loopback codes.
GNLB loopback codes.

A1LB, A2LB, and A5LB Test Procedures

Using the codes listed in
if enabled). A tester at the customer premises can activate CLOC or CREM loopbacks.
Use the test procedure for verifying the integrity of the HDSL2 channels at every module location as well as the
DS1 channels to the customer and the local DSX-1 interface.
For information regarding the 16-bit DBDB command for retrieving information on the circuit's
margin and pulse attenuation, see
Parameters" on page
56
Loopbacks Toward Network
HDSL2 SPAN
HDSL2 SPAN
HDSL2 SPAN
=
HDSL2 SPAN
=
Loopbacks Toward Customer
HDSL2 SPAN
HDSL2 SPAN
Figure 32. Loopback Modes
Table 23 on page 58, a network tester can activate NLOC or NREM loopbacks (or SMJK,
"Payload Retrieval of Margin and Pulse Attenuation
27.
June 12, 2002
LTPH-UM-1149-01
TLOS*
HRU-412 HRU-412
LOGIC All ones
HRU-412
H2TU-R
SMJK*
HRU-412 HRU-412
2-in-5 All ones
11000 HRU-412
H2TU-R
=
FF02
NREM* NREM
C742 ‡
1110000 HRU-412 HRU-412 HRU-412 HRU-412 3-in-7
3 in 7 All ones
HRU-412 HRU-412
HRU-412
H2TU-R
CLOC
HRU-412 HRU-412 H2TU-R
5 IN 7
All ones
HRU-412
H2TU-R
=
3F02
CLOC CLOC CLOC CLOC
C742 ‡
1111100 5-in-7
HRU-412 HRU-412 HRU-412 HRU-412
5 IN 7 5 IN 7 5 IN 7
HRU-412 HRU-412 HRU-412 H2TU-R
H2TU-R
RULB
H2TU-C-231 List 3F