We claim the ornamental design for a repeater for communications apparatus, as shown and described.
FIG. 1 is a front perspective view of a repeater for communications apparatus showing our new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left-side elevational view thereof;
FIG. 5 is a right-side elevational view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken lines in the figures depict environmental subject matter and form no part of the claimed design. In addition, the unshaded surfaces that directly adjoin the claimed solid line edges form no part of the claimed design.