Fig. 428. Terminal Apparatus. Chelsea Office
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Fig. 429. Floor Plan, Automatic Office, Lansing, Michigan
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Another view of the terminal-room apparatus is given in Fig. 428. This is taken from the point marked B on the floor plan of Fig. 423. At the right may be seen the message registers on which the calls of the subscribers in this office are counted as a basis for the bills for their service. At the extreme left is shown the private-line test board. Through this board run all of the lines leased for private use, and also all of the order wire or call lines passing through this office. The purpose of such an arrangement is to facilitate the testing of such line wires. At the right of this private-line test board is shown a four-position wire chief's desk, upon which are provided facilities for making all of the tests inside and outside.

Fig. 430. Line-Switch Units
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Fig. 431. Automatic Apparatus at Lansing Office
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The main frame is shown at the right of Fig. 428, just to the right of a gallery from which a step-ladder leads. The left-hand side of this frame is the line or protector side, but the portion toward the observer in this picture is unequipped. These equipped protector strips carry 400 pairs of terminals each, and the consequent length of these strips makes necessary the gallery shown, in order that all of them may be readily accessible.