Loopback modes, Figure 29 on, Figure 29. loopback modes – ADC HDSL4 User Manual
Page 58
Testing
LTPH-UM-1031-03, Issue 3
50
September 12, 2003
H4TU-C-319 List 1
Figure 29.
Loopback Modes
All ones
All ones
All ones
SPAN 4
SPAN 3
SPAN 1
CDU1
4 in 6
111100
HDU-409
NDU2
SPAN 2
CDU1
4 in 6
111100
HDU-409
NDU1
H4D1
H4D2
All ones
All ones
HDSL4 SPAN
HLU
HLU
HLU
C742
‡
All ones
HDSL4 SPAN
D3D3
‡
HLU
HLU
HLU
CREM
HRU-412
5 IN 7
CLOC
HRU-412
HDSL4 SPAN
HLU
HLU
HLU
HRU-412
HRU-412
5 IN 7
CLOC
HRU-412
HRU-412
5 IN 7
CLOC
HRU-412
HRU-412
5 IN 7
CLOC
HRU-412
HRU-412
CLOC
All ones
HLU
HLU
HLU
HLU
HLU
HLU
HLU
HLU
HLU
HLU
HLU
HLU
HLU
HLU
HLU
D3D3
‡
NLOC
HRU-412
HDSL4 SPAN
HLU
HLU
HLU
HRU-412
HRU-412
3 in 7
NREM
HRU-412
HRU-412
HRU-412
HRU-412
HDSL4 SPAN
HDSL4 SPAN
HLU
HLU
HLU
HLU
HLU
HLU
HRU-412
HRU-412
HRU-412
HRU-412
HRU-412
HRU-412
C742
‡
11000
2-in-5
H4TU-C
H4TU-C
NREM*
SMJK*
TLOS*
LOGIC
Loopbacks Toward Customer
CI-Customer Interface
DSX-1
Loopbacks Toward Network
* Set the NLBP option to AIS to send AIS (indicated by an all ones pattern) for any network loopback.
SPAN 1
SPAN 2
CDU1
SPAN 3
H4D1
CDU2
H4D2
H4TU-R
H4TU-R
H4TU-R
H4TU-R
H4TU-R
H4TU-R
H4TU-R
All ones
H4TU-C
H4TU-C
H4TU-C
H4TU-C
H4TU-C
H4TU-R
H4TU-C
C741
‡
C741
‡
C754
‡
C754
‡
FF04
FF06
2-in-6
110000
3-in-6
111000
FF02
1110000
3-in-7
FF1E
1111000
3F04
3F06
3F1E
6-in-7
1111110
3F02
1111100
4-in-6
111100
5-in-6
111110
5-in-7
=
=
=
=
=
=
=
=
=
A3LB loopback codes.
‡ A5LB loopback codes.
4-in-7
GNLB loopback codes.
HLU
HLU
HLU
H4D1
D1LB
H4D2
D2LB
H4TU-C
H4TU-R
Bidirectional (Dual) Loopbacks
COLB
RULB