A3Lb Test Procedures - ADC HiGain H2TU-C-202 User Manual

Testing
H2TU-C HLU HLU HLU
H2TU-C HLU HLU HLU
H2TU-C
HLU HLU HLU
H2TU-C
HLU HLU HLU
FF1E
NLOC
1111000
4-in-7
HLU HLU HLU
H2TU-C
3F1E
CREM
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
RLB
HLU HLU HLU
H2TU-C
* Set the NLBP option to AIS to send AIS (indicated by an all ones pattern) for any network loopback.
=
A3LB loopback code.
GNLB loopback codes.

A3LB Test Procedures

Figure 29 on page 46
A3LB commands shown.
The H2TU-C can be looped back by sending the Addressable Office Repeater (AOR) LPBK activation code
1111-1111-0001-1110 (FF1E) for at least 5 seconds. This causes the H2TU-C to enter the NLOC state. The
Loopback Time-Out setting determines the duration of this loopback unless it is overridden by the reception of a
second identical 16-bit loopup command before the timer expires. When this time-out override state exists, the
only method to loop the H2TU-C down is to issue one of the three loopdown commands listed in
automatic time-out mode is restored during subsequent loopback sessions.
Table 25 on page 47 summarizes the codes required to execute Addressable 3 (A3LB) repeater loopback
commands. All code sequences must be present for at least 5 seconds.
46
Loopbacks Toward Network
=
=
Loopbacks Toward Customer
Loopbacks From H2TU-R Front Panel
Figure 29. Loopback Modes
is a graphical representation of the various loopback configurations with the associated
HDSL2 SPAN
HDSL2 SPAN
HDSL2 SPAN
HDSL2 SPAN
HDSL2 SPAN
HDSL2 SPAN
HDSL2 SPAN
HDSL2 SPAN
June 6, 2003
LTPH-UM-1208-01
TLOS*
HRU-412 HRU-412
LOGIC HRU-412 All ones
H2TU-R
SMJK*
HRU-412 HRU-412
2-in-5 All ones
11000 HRU-412
H2TU-R
SMJK*
HRU-412 HRU-412
1-in-6 All ones
HRU-412
100000
H2TU-R
=
FF02
NREM* NREM
1110000 3-in-7
HRU-412 HRU-412 HRU-412 HRU-412
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
1111100 5-in-7
HRU-412 HRU-412 HRU-412 HRU-412
5 IN 7 5 IN 7 5 IN 7
H2TU-R
HRU-412 HRU-412 HRU-412
LLB
H2TU-R
H0033-A
Table 25. The
H2TU-C-202 List 7G