encountered, proceed to (6) below.
(3) Notify local maintenance personnel of the
problem and request the multiplex equipment be
is local. If the fault is
trouble by substituting for the defective channel
equipment. If the noise is found to be across the entire
group, consider patching at the group level, replacing
defective equipment, or if the outage may be long in
duration, (i.e., longer than 10 minutes), rerouting cir-
cuits in accordance with established procedures and
at this point indicates the fault lies between the
level patch panel and the signal source. This
(5) After the fault is cleared, restore any rerouted
Figure 4-81. Noise burst on a local subscriber circuit, fault isolation flow chart (sheet 1 of 3).