PART B - UNIT LEVEL MAINTENANCE ON TELEPHONE TERMINALS
10. Unit level maintenance starts with the operator of the equipment. The operator installs the
equipment and connects the telephones. When the equipment doesn't perform as expected, the operator
tests the equipment to determine what went wrong. So operator maintenance is a must.
11. Operator maintenance for the multiplexer-combiner is performed on a weekly basis. (TM 11-
5805-707-12 identifies the maintenance that is to be performed.)
12. PMCS is performed to ensure the equipment is mission ready and to keep serious problems from
suddenly happening. PMCS should be performed weekly if--
a. You are the assigned operator and have not operated the item since the last weekly PMCS.
b. You are operating the equipment for the first time.
NOTES: Use your PMCS chart to get the number for the TM Item Number column of
DA Form 2404 when recording results of PMCS. (See Figure 2-2.)
If the equipment must be in operation all the time, check and service those items that can
be checked and serviced without disrupting operation. Make the complete checks and
services when the equipment can be shut down or when order wire channels are
c. You would perform before maintenance prior to installation.
13. Routine checks are not listed as PMCS and should be performed as the need arises. Some routine
Checking for frayed cables
Storing items not in use
Checking for loose nuts, bolts, and screws