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61200060L1-1
•
V.54 Inband PLB - indicates inband transmission of V.54
loopup pattern in channels occupied by DTE data only.
This choice should be used for public fractional network
•
ANSI FDL LLB - initiates the transmission of an FDL
Line loopup code toward the far end.
•
AT&T Inband LLB - activates the line loopback using
inband code
•
ANSI FDL PLB - initiates the transmission of an FDL
payload loopup code toward the far end
•
AT&T PLB - indicates the transmission of the PLB
maintenance on the FDL
Only V.54
LOOPBACKS
full T1 stream including the FDL is not transported to the far end
(unless it is a private network).
5.
Use the up and down scroll keys to select.
6.
Press
to record selection. The cursor returns to the
ENTER
2 in front of R
7.
Use the up and down scroll keys to select 1)L
L
or 3)P
OOPBACK
3)PATTERN - Sets the pattern for the test and initiates the
transmission of the pattern. The test is terminated by
selecting
. There are four patterns available.
NONE
•
3.24 All DS0s - generates a 3 in 24 pattern
•
511 Active DS0s - generates a 511 test pattern and inserts
the pattern into currently active channels
•
1:8 ALL DS0s - generates a 1 in 8 pattern in all DS0s
•
All Ones - generates an all ones pattern in every channel
•
None - terminates pattern generation
8.
Use the up and down scroll keys to select; for example,
511 ACTIVE DS0s.
9.
Press
to record selection. The TSU starts to
ENTER
generate a 511 test pattern and inserts the pattern into all
DS0s.
TSU User Manual
can be used with fractional T1 since the
L
EMOTE
OOPBACK
.
ATTERN
Chapter 3. Operation
.
OCAL
3-27
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