Trouble locating and clearing procedures (continued) 1-331
DMS-100 Family NA100 Trouble Locating and Clearing Procedures Volume 2 of 2 LET0015 and up
Running a C7BERT
(continued)
To activate link fault sectionalization, type
>LFSLOOP START link_no element_type loopback_type
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 1 DS0DP LATCH 1
68
Your next step depends on the generated response.
ATTENTION
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.
If the response
Do
is Link nn: LFS ON complete
is Looped back at element mm
step 79
Link nn: LFS ON complete Looped back at element
mm WARNING: Physical loop may exist as confir-
mation byte not received.
step 79