A3Lb And A4Lb Test Procedures - ADC HiGain HLU-200 List 2D User Manual

GNLB Loopback Test Procedures
A3LB A4LB T
AND
The HLU-200 can be looped back by sending the Addressable Office Repeater (AOR) LPBK activation code
1111(F) 1111(F) 0001(1) 1110(E) for at least 5 seconds. This causes the HLU-200 to enter the NLOC state. The
Loopback Time-out option can be set by the user to:
•
NONE (0 minutes)
•
20 minutes
•
60 minutes
•
120 minutes
These selections determine the duration of this loopback, unless it is overridden by the reception of a second
identical 16-bit loop-up command before the timer expires. When this time-out override state exists, the only way
to loop the HLU-200 down is to issue one of the three loopdown commands listed in Step 2. The automatic
time-out mode is restored during subsequent loopback sessions.
Table 11, "Addressable 3 and 4 (A3LB and A4LB) Repeater Loopback Commands," on page 34
codes required to execute Addressable 3 and 4 (A3LB and A4LB) repeater loopback commands. All code
sequences must be present for at least 5 seconds. The abbreviations used in
•
LU = Loop Up
•
LD = Loop Down
•
NI = Network Interface
• CI = Customer Interface
• ESF-DL = Extended Super Frame Data Link
Table 11. Addressable 3 and 4 (A3LB and A4LB) Repeater Loopback Commands
Position
HLU-200 LU FROM NI
HLU-200 LU from CI
HDU DOUBLER 1 FROM NI
HDU DOUBLER 1 FROM CI
HDU DOUBLER 2 FROM NI
HDU DOUBLER 2 FROM CI
HRU LU FROM NI
HRU LU FROM CI
HRU LU FROM NI
HRU LU FROM NI
HRU LU FROM NI (ESF-DL)
HLU and HRU LD FROM NI OR CI
HLU and HRU LD FROM NI OR CI
HLU and HRU LD FROM NI OR CI (ESF-DL)
(a) The left-most bit arrives first in all sequences. The detection algorithm functions reliably with a random
-3
10 Bit Error Ratio (BER) on the facility. The entire arming and loopback sequence can be initiated at the
remote HRU location.
(b) This is the HEX number for the 4-bit group.
34
P
EST ROCEDURES
Name
NLOC
CREM
NDU1
CDU1
NDU2
CDU2
NREM
CLOC
SMJK
SMJK
SMJK
Loopdown
Loopdown
Loopdown
February 10, 1999
150-200-124-02, Issue 2
Table 11 are as follows:
(a)
Code
(b)
1111(F) 1111(F)0001(1)1110(E)
0011(3)1111(F)0001(1)1110(E)
1111 1111 0000 0100 (FF04)
0011 1111 0000 0100 (3F04)
1111 1111 0000 0110 (FF06)
0011 1111 0000 0110 (3F06)
1111(F)1111(F)0000(0)0010(2)
0011(3)1111(F)0000(0)0010(2)
11000 11000 11000 ...
100000 100000 100000...
1111(F)1111(F)0100(4)1000(8)
11100 11100 11100 ...
100 100 100 ...
1111(F)1111(F)0010(2)0100(4)
summarizes the
HLU-200 List 2D