Loopback Modes - ADC H4TU-C-388-L1 User Manual

LTPH-UM-1122-02, Issue 2
H4TU-C HLU HLU HLU
H4TU-C HLU HLU HLU
H4TU-C
HLU HLU HLU
H4TU-C
SPAN 4
FF1E
NLOC D3D3 ‡
1111000
4-in-7
HLU HLU HLU
H4TU-C
3F1E
CREM
D3D3 ‡
1111110
6-in-7
All ones HLU HLU HLU
H4TU-C
HLU HLU HLU HLU HLU HLU HLU HLU HLU HLU HLU HLU HLU HLU HLU
All ones
H4TU-C
HLU HLU HLU
All ones
H4TU-C
H4TU-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 loopback codes.
‡ A5LB loopback codes.
GNLB loopback codes.
H4TU-C-388 List 1
Loopbacks Toward Network
HDSL4 SPAN
HDSL4 SPAN
HDSL4 SPAN
=
FF04
C741 ‡
1 NDU1 U D C
2-in-6
6 i n 4
SPAN 1
110000
0 0 1 1 1 1
H4D1
9 0 - 4 U D H
=
HDSL4 SPAN
=
Loopbacks Toward Customer
HDSL4 SPAN
HDSL4 SPAN
=
3F04
C741 ‡
CDU1
4-in-6
SPAN 1
111100
H4D1
Bidirectional (Dual) Loopbacks
H4D1
D1LB
Figure 29. Loopback Modes
September 12, 2003
=
FF06
C754 ‡
1 NDU2 U D C
3-in-6
6 i n 4
SPAN 2 SPAN 3
111000
0 0 1 1 1 1
H4D2
9 0 - 4 U D H
=
3F06
C754 ‡
CDU2
5-in-6
SPAN 2 SPAN 3
111110
H4D2
H4D2
D2LB
TLOS*
HRU-412 HRU-412
LOGIC All ones
HRU-412
H4TU-R
SMJK*
HRU-412 HRU-412
2-in-5
11000 HRU-412 All ones
H4TU-R
=
FF02
NREM* NREM
C742 ‡
1110000 HRU-412 HRU-412 HRU-412 HRU-412 3-in-7
3 in 7
HRU-412 HRU-412 All ones
HRU-412
H4TU-R
All ones
H4TU-R
CLOC
HRU-412 HRU-412
H4TU-R 5 IN 7
All ones
HRU-412
H4TU-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 H4TU-R
H4TU-R
H4TU-R
RULB
Testing
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