PairGain HiGain HLU-319 Manual page 43

150-319-142-01
Table 4. Addressable 1, 2, 5 (A1LB, A2LB, A5LB) Repeater Loopback
Name
TIME-OUT OVERRIDE
FAR END NI ACTIVATE Unblock AIS and
IOR POWER DOWN
(HLU)
* The left most bit arrives first in all sequences. The detection algorithm functions
reliably with a random 10
DOWN code must remain present for the duration of the power down mode.
When this code is removed, the HiGain system returns to its normal unlooped
and unarmed state. Note that the entire arming and loopback sequence can be
initiated at the remote HRU location.
** This is the HEX number for the 4-bit group.
†The HRU identifies CREM with 231 bit errors, including the frame bits. When
framed data is being sent in the AUTO framing mode, the number of the 231 bit
errors detected by the test set varies from 229 to 231, depending on whether or
not the test set counts frame errors as bit errors, and on the number of frame bits
contained in the block of 231 error bits.
‡The HRU generates this bit pattern in a series of discontinuous bursts containing
20 bit errors each, including frame bits. Those test sets that do not count frame
error bits as data bit errors will indicate fewer bits than the HRU transmits for this
CI loopback.
HLU-319 List 4B
December 22, 1997
Commands* (Continued)
Description
Loopback
Time-out Override
pass 2-in-5
Removes HDSL
line power
-3
Bit Error Ratio (BER) on the facility. The IOR POWER
PairGain Engineering - Plant Series
Code
1101(D)0101(5)1101(D)0110(6)
1100(C)0101(5)0101(5)0100(4)
0110(6)0111(7)0110(6)0111(7)
Revision 01
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