Section 150-619-100
Revision 01
Page 23
ADDRESSABLE 2 (A2LB) REPEATER LOOPBACK COMMANDS
C
OMMAND
D
ESCRIPTION
C
ODE
ARMING or NI LPBK (in-band)
Arming code
11000 11000 ...
ARMING or NI LPBK (ESF data link)
Arming code
1111 1111 0100 1000 (FF48)
IR LPDN or DISARM (in-band)
Disarming code
11100 11100 ...
DISARM (ESF data link)
Disarming code
1111 1111 0010 0100 (FF24)
IOR LPBK
(NLOC and CREM 231 errors)
HLU Loop-up
1101 0011 1101 0011 (D3D3)
ILR-2 LPBK
(NREM and CLOC 20-bit errors)
HRU Loop-up
1100 0111 0100 0010 (C742)
IR LPDN
Loop-down (HLU or HRU)
1001 0011 1001 0011 (9393)
IR QUERY LPBK
Query Loopback
1101 0101 1101 0101 (D5D5)
IR ALTERNATE QUERY LPBK
Alternate Query Loopback
1101 0101 1110 1010 (D5EA)
TIME-OUT OVERRIDE
Loopback Time- out Override
1101 0101 1101 0110 (D5D6)
FAR END NI ACTIVATE
Unblock AIS and pass 2 in 5
1100 0101 0101 0100 (C554)
IOR POWER-DOWN (HLU)
Removes VHDSL line power
0110 0111 0110 0111 (6767)
Note
The left-most bit arrives first in all sequences. The detection algorithm functions reliably with a random 10
-3
Bit
Error Ratio (BER) on the facility. The IOR Power-down code must remain present for the duration of the power-
down mode. When this code is removed, the HiGain-2 system returns to its normal unlooped and unarmed state.
6. After testing is complete, send the universal
Intelligent Repeater Loop-down (IR LPDN) code
if the system is to loop down but remain Armed.
Send the disarm code 11100 if all the equipment
is to be looped down, disarmed, and returned to
normal operation. The Armed mode has an
automatic time-out of 120 minutes.
7. All of the above loopbacks can also be initiated
from the front panel of the HLU-619 with the
Mode and SEL push buttons (see paragraph
8.01).
