Nortel North American DMS-100 Instruction Manual page 346

If link fault sectionalization (LFS) is activated, an anomaly in the NT9X78BA and
NT9X78CA cards can cause latch past to occur. When the last DS0DP is a BA or CA
paddle board, LFS may latch past the last DS0DP link.
For example, if the fifth and last device in a link is a BA or CA card, LFS may latch the
sixth or seventh DS0DP.
Before running this procedure, check the number and type of devices on a link. This
information helps reduce the link diagnosis time.
68
DMS-100 Family NA100 Trouble Locating and Clearing Procedures Volume 2 of 2 LET0015 and up
Trouble locating and clearing procedures (continued)
To activate link fault sectionalization, type
>LFSLOOP START
occurrence
and press Enter.
where
link_no
is the number of the link you want to test (0 to 15)
element_type
is the type of network element that the loopback will use
(DS0DP, OCUDP, CSU, NEI, or DSU)
loopback_type
is if the loopback latches or does not latch (LATCH or
NONLATCH)
occurrence
is the occurrence of the element type where link fault
sectionalization will initiate (1 to 16)
Example input:
>LFSLOOP START
Your next step depends on the generated response.
If the response
is Link nn: LFS ON complete
is Looped back at element mm
Link nn: LFS ON complete Looped back at element
mm WARNING: Physical loop may exist as confir-
mation byte not received.
Running a C7BERT
ATTENTION
link_no element_type
1 DS0DP LATCH
(continued)
loopback_type
1
Do
step 79
step 79
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