Figure 1-13. Linesman bag.
Tags are important for circuit marking. You do not install a wire line without identifying the
line. All wire lines must be identified per the local signal operating instructions (SOI).
Circuits are designed by individual circuit numbers, switchboard designators, or a
combination of the two. Field wire lines are numbered consecutively and no two lines are given the
Tagging of field wire lines is necessary because tags often provide the only method of
distinguishing one line from another. Tagging simplifies the turning over of wire systems to relieving
units, makes line tracing easier, and simplifies maintenance. If tags, normally issued as a field item, are
not available, a unit is expected to improvise substitute tags. Every unit is responsible for ensuring that
its lines are adequately labeled.
Placement of tags will be discussed later. Some examples of tags and how they are
identified are shown in Figure 1-14.
Telephone set TA-312/PT is a small, rugged, waterproof, portable field telephone that was
designed primarily for operation in the field on a local battery system. (See Figure 1-15.) However, the
telephone will also operate on a common battery system and common battery signaling system.