Telephone base unit

FIG. 1 is a front perspective view of a telephone base unit of the present invention;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a first side view thereof;

FIG. 5 is a second side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken line showing of telephone base unit is included for the purpose of illustrating environment and forms no part of the claimed design.

I claim the ornamental design for a telephone base unit, as shown and described.

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